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1. (Re) thinking Towards a Sustainable Analytical Chemistry: Part I: Inorganic Elemental Sample Treatment, Part II: Alternative Solvents and Extraction Techniques

Author:
Ana P.R. Santana; Patricia de Andrade Nascimento; Taciana G.S. Guimarães; Iohanna M.N. Ribeiro Menezes; Daniel F. Andrade; Andrea Oliveira; Mario H. Gonzalez
Source:
Trends in analytical chemistry 2022 pp. 116596
ISSN:
0165-9936
Subject:
Raman spectroscopy; X-radiation; alkali treatment; atomic absorption spectrometry; chemical analysis; chemometrics; combustion; digestion; fluorescence; liquid-liquid extraction; microwave treatment; toxicity; ultrasonic treatment; ultraviolet radiation
Abstract:
... Currently, there is a huge demand for the development of analytical methods for chemical analysis. Sustainable methods have aroused the interest of researchers in the last years. This paper reviews important technologies for digestion and solid-liquid extraction approaches, with emphasis in emerging greener methods for the elemental analysis of different samples. Analytical technologies such as Mi ...
DOI:
10.1016/j.trac.2022.116596

2. A Unique Bacterial Pelletized Cultivation Platform in Rhodococcus opacus PD630 Enhanced Lipid Productivity and Simplified Harvest for Lignin Bioconversion

Author:
Bing Xu; Qiang Li; Yuanqiao Pu; Shangxian Xie; Arthur J. Ragauskas; Jorge Arreola-Vargas; Zhi-Hua Liu; Joshua S. Yuan
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.3 pp. 1083-1092
ISSN:
2168-0485
Subject:
Rhodococcus opacus; absorbance; agitation; alkali treatment; bacteria; biomass; biotransformation; carbon; carbon nitrogen ratio; centrifugation; energy; fermentation; flocculants; green chemistry; lignin; lipid content; lipids; liquids; nitrogen content; pelleting; pellets; total soluble solids; viscosity
Abstract:
... Pelletized liquid cultivation has been widely explored because of its advantages in biomanufacturing, such as easier biomass harvesting, higher product yield, and lower medium viscosity and energy consumption. In this study, we discovered that the nonfilamentous bacterium Rhodococcus opacus PD630 could form pellets during the fermentation of alkaline pretreatment liquor containing lignin as a carb ...
DOI:
10.1021/acssuschemeng.1c05239

3. A green extraction method for gelatin and its molecular mechanism

Author:
Xin Feng; Tingwei Liu; Liang Ma; Hongjie Dai; Yu Fu; Yong Yu; Hankun Zhu; Hongxia Wang; Hongxia Tan; Yuhao Zhang
Source:
Food hydrocolloids 2022 v.124 pp. 107344
ISSN:
0268-005X
Subject:
alkali treatment; collagen; fish skin; freeze-thaw cycles; gel strength; gelatin; gelatinization; hydrocolloids; hydrogen bonding; ice
Abstract:
... In this work, a green extraction method of gelatin was proposed to replace traditional acid and alkali treatment by microwave-rapid freezing-thawing coupling method. The mechanism of rapid gelatinization of fish skin collagen induced by microwave-rapid freezing-thawing coupling was examined systematically. The results showed that the dense structure of fish skin collagen fibers became loose, the c ...
DOI:
10.1016/j.foodhyd.2021.107344

4. A green pretreatment approach of corn stalk wastes for obtaining micro/nano-cellulose fibers, monosaccharides and lignin fractions

Author:
Shibo Yang; Keli Chen; Zhengliang Zhu; Qingqing Guan; Huajing Zhou; Liang He
Source:
Renewable energy 2022 v.194 pp. 746-759
ISSN:
0960-1481
Subject:
alkali treatment; biomass; biorefining; corn; corn stover; energy; enzymatic hydrolysis; ethanol; lignin; lignocellulose; liquids; pith; renewable energy sources; ultrasonics
Abstract:
... Efficient separation of carbohydrates and lignin from lignocellulosic biomass, and further high-value conversion are still the main challenge of biorefinery. Oxygen-enhanced alkali treatment as a green method for separating polysaccharides and lignin from gramineous materials with environmental, economic and low energy consumption. Herein, oxygen-enhanced alkali technology was used to pretreatment ...
DOI:
10.1016/j.renene.2022.05.137

5. A novel preparation strategy of emulsion gel solely stabilized by alkaline assisted steam-cooking treated insoluble soybean fiber

Author:
Xiujie Zhao; Bifen Chen; Zhehao Sun; Tongxun Liu; Yongjian Cai; Lihua Huang; Xinlun Deng; Mouming Zhao; Qiangzhong Zhao
Source:
Food hydrocolloids 2022 v.129 pp. 107646
ISSN:
0268-005X
Subject:
adsorption; alkali treatment; crosslinking; crystal structure; droplets; emulsions; gels; hydrocolloids; microstructure; modulus of elasticity; oil-water interface; oils; okara; soybeans; wettability
Abstract:
... In this work, the insoluble soybean fiber, which was derived from okara facilely prepared by alkaline assisted steam-cooking treatments (AST-ISF), was used to prepare emulsion gels through regulating oil volume fraction (φ, 0.1–0.6) and ISF concentration (c, 0.05%–0.5%). AST-ISF was mainly composed of insoluble fiber (82.99 ± 0.24%), and most proteins were removed by alkaline treatment. AST endowed ...
DOI:
10.1016/j.foodhyd.2022.107646

6. A perspective on the combination of alkali pre-treatment with bioaugmentation to improve biogas production from lignocellulose biomass

Author:
Kwame O. Donkor; Lalitha D. Gottumukkala; Richen Lin; Jerry D. Murphy
Source:
Bioresource technology 2022 v.351 pp. 126950
ISSN:
0960-8524
Subject:
alkali treatment; anaerobic digestion; bioaugmentation; biodegradability; biofertilizers; biogas; biomass; bioprocessing; circular economy; digestibility; energy; feedstocks; gas production (biological); greenhouse gases; lignocellulose; methane; methane production
Abstract:
... Anaerobic digestion (AD) is a bioprocess technology that integrates into circular economy systems, which produce renewable energy and biofertilizer whilst reducing greenhouse gas emissions. However, improvements in biogas production efficiency are needed in dealing with lignocellulosic biomass. The state-of-the-art of AD technology is discussed, with emphasis on feedstock digestibility and operati ...
DOI:
10.1016/j.biortech.2022.126950

7. A techno-economic perspective on a microwave extraction process for efficient protein recovery from agri-food wastes

Author:
Cristina Barrios; Marina Fernández-Delgado; Juan C. López-Linares; María Teresa García-Cubero; Mónica Coca; Susana Lucas
Source:
Industrial crops and products 2022 v.186 pp. 115166
ISSN:
0926-6690
Subject:
alkali treatment; antioxidant activity; biorefining; kale; microwave treatment; wastes
Abstract:
... Different agri-food wastes (brewer´s spent grain (BSG), spent coffee ground (SCG) and kale stems) have been proposed as excellent sources of protein-enriched extracts with an antioxidant capacity. The optimization of the microwave-assisted hydrothermal and alkali extraction has been compared in this study. From a technical and economic point of view, the extraction of BSG under optimal conditions ...
DOI:
10.1016/j.indcrop.2022.115166

8. A universal synthesis of MOF-Hydroxyl for highly active oxygen evolution

Author:
Wenjing Dai; Junshuang Zhou; Ying Bian; Zhuoran Hao; Yunpeng Cao; Jiajia Xiao; Huiyang Gou; Faming Gao
Source:
Journal of colloid and interface science 2022 v.623 pp. 318-326
ISSN:
0021-9797
Subject:
alkali treatment; electron microscopy; oxidation; oxygen production; porous media
Abstract:
... Since of their adjustable pore structure and variety of metal sites, MOFs materials have infinite possibilities, but their low intrinsic activity hinders them from being employed in electrolytic water. The sulfurization and oxidation of MOFs has proven to be a feasible technique for producing highly active catalytic materials. Here, the MOFs are completely converted to hydroxide by treatment with ...
DOI:
10.1016/j.jcis.2022.05.051

9. Advancements in detection and removal of antibiotic resistance genes in sludge digestion: A state-of-art review

Author:
Zehao Zhang; Xuan Li; Huan Liu; Arash Zamyadi; Wenshan Guo; Haiting Wen; Li Gao; Long D. Nghiem; Qilin Wang
Source:
Bioresource technology 2022 v.344 pp. 126197
ISSN:
0960-8524
Subject:
aerobic digestion; alkali treatment; antibiotic resistance; digestion; ferric chloride; iron; people; sludge; thermal hydrolysis; wastewater treatment
Abstract:
... Sludge from wastewater treatment plants can act as a repository and crucial environmental provider of antibiotic resistance genes (ARGs). Over the past few years, people’s knowledge regarding the occurrence and removal of ARGs in sludge has broadened remarkably with advancements in molecular biological techniques. Anaerobic and aerobic digestion were found to effectively achieve sludge reduction a ...
DOI:
10.1016/j.biortech.2021.126197

10. Alkali Extraction to Detoxify Rice Husk-Derived Silica and Increase Its Biocompatibility

Author:
Ji Yeon Park; Wonsik Mun; Jinyoung Chun; Byoung-In Sang; Robert J. Mitchell; Jin Hyung Lee
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.24 pp. 7811-7817
ISSN:
2168-0485
Subject:
alkali treatment; biocompatibility; carbon; combustion; green chemistry; humans; mice; polyethylene glycol; rice; silica; temperature; toxicity; viability
Abstract:
... As interest in natural biogenic silica nanoparticles (NPs) from rice husks grows, it is important to know how their preparation (i.e., combustion, acid leaching, or alkali extraction) impacts their biocompatibility. Acid leaching and alkali extraction both generated highly pure silica NPs (>99.1% SiO₂ vs 93.1% with combustion). However, toxicity tests with six different human and mouse cell lines ...
DOI:
10.1021/acssuschemeng.2c01307

11. Alkali Treatment Influence on Characterization of Setaria Italic (Foxtail Millet) Fiber Reinforced Polymer Composites Using Vacuum Bagging

Author:
R. V. Saikumar Reddy; D. Mohana Krishnudu; P. Rajendra Prasad; P. Venkateshwar Reddy
Source:
Journal of natural fibers 2022 v.19 no.5 pp. 1851-1863
ISSN:
1544-046X
Subject:
Fourier transform infrared spectroscopy; Setaria; Setaria italica; alkali treatment; electron microscopy; epoxides; impact strength; polymers; thermogravimetry
Abstract:
... Natural fiber polymer composites have broad interest in recent times due to low cost and superior mechanical properties. The present study deals with Setaria italic (Foxtail millet) fiber reinforced Lapox L-12 resin polymer composite fabricated by vacuum bagging method. The work examined the differences of NaOH alkali-treated (5% and 10% concentration) and untreated fibers with different weight ra ...
DOI:
10.1080/15440478.2020.1788494

12. Alkali-activation of cellulose nanofibrils to facilitate surface chemical modification under aqueous conditions

Author:
Shingo Yokota; Airi Nishimoto; Tetsuo Kondo
Source:
Journal of wood science 2022 v.68 no.1 pp. 14
ISSN:
1435-0211
Subject:
alkali treatment; atomic force microscopy; cellulose; cellulose nanofibers; hydrophilicity; hydrophobicity; sodium hydroxide; wide-angle X-ray scattering; wood
Abstract:
... In this study, we developed a surface-activation technique for cellulose nanofibrils (CNFs) using mild-alkali and aqueous conditions. CNFs were initially processed using the aqueous counter collision (ACC) method to produce Janus-type amphiphilic CNFs with both hydrophilic and hydrophobic faces on the surface of a single nanofibril (ACC-CNF). Selective functionalization of the hydroxy groups on th ...
DOI:
10.1186/s10086-022-02022-9

13. Alkaline Pretreatments for Sorghum and Miscanthus Anaerobic Digestion: Impacts at Cell Wall and Tissue Scales

Author:
Hélène Laurence Thomas; Helga Felix P. Nolasco; Hélène Carrère; Marc Lartaud; Tuong-Vi Cao; Christelle Baptiste; Jean-Luc Verdeil
Source:
BioEnergy research 2022 v.15 no.2 pp. 792-809
ISSN:
1939-1234
Subject:
Miscanthus giganteus; alkali treatment; anaerobic digestion; biodegradability; bioenergy; biomass; calcium oxide; cell walls; cellulose; delignification; histology; hybrids; lignin; lignocellulose; methane; methane production; research; sclerenchyma; xylem
Abstract:
... Lignocellulosic biomass is hardly degraded during anaerobic digestion. Among a large panel of pretreatments used to improve the biodegradability of this substrate, alkaline pretreatments are recognized as the most efficient to remove lignin and therefore improve the methane production of these substrates. This article uses different histological stains (FASGA, phloroglucinol, Mäule reagent, Congo ...
DOI:
10.1007/s12155-021-10342-9

14. Alkaline pretreatment of Taraxacum kok-saghyz (TK) roots for the extraction of natural rubber (NR)

Author:
David A. Ramirez Cadavid; Upul Hathwaik; Katrina Cornish; Colleen McMahan; Frederick C. Michel
Source:
Biochemical engineering journal 2022 v.181 pp. 108376
ISSN:
1369-703X
Subject:
Taraxacum kok-saghyz; alkali treatment; biocompatible materials; endo-1,4-beta-glucanase; enzymatic treatment; gels; inulin; molecular weight; polygalacturonase; rubber; sodium hydroxide; temperature
Abstract:
... Natural rubber (NR) is an essential biomaterial the supply of which is insecure. Taraxacum kok-saghyz (TK), a rubber-producing dandelion, is an alternative source of NR that has excellent potential for commercial development. Scalable methods for rubber extraction at high yield, quality and purity are needed to meet this potential. We previously developed an aqueous, enzymatic method for the extra ...
DOI:
10.1016/j.bej.2022.108376

15. Alkaline treatment enhances mass transfer in Protein A affinity chromatography

Author:
Nico Lingg; Andreas Daxbacher; Desiree Womser-Matlschweiger; Dietmar Pum; Jürgen Beck; Rainer Hahn
Source:
Journal of chromatography 2022 v.1673 pp. 463058
ISSN:
0021-9673
Subject:
affinity chromatography; alkali treatment; cleaning in place; ligands; mass transfer
Abstract:
... Cycle stability is important for preparative chromatography resins. Up to 200 cycles have been reported for Protein A affinity resins when used under optimized operating conditions. Through engineered ligands, alkaline resistant Protein A resins are available that can withstand repeated cleaning-in-place cycles with even 1 M NaOH. This enables an increase of purification cycles through the reducti ...
DOI:
10.1016/j.chroma.2022.463058

16. An Effective Degumming Technology for Ramie Fibers Based on Microbial Coculture Strategy

Author:
Qi Yang; Shengwen Duan; Lifeng Cheng; Xiangyuan Feng; Ke Zheng; Zhiyuan Liu; Mingqiang Gao; Yuande Peng
Source:
Journal of natural fibers 2022 v.19 no.4 pp. 1555-1565
ISSN:
1544-046X
Subject:
Bacillus cereus; Bacillus subtilis; Dickeya dadantii; alkali treatment; biotechnology; coculture; degumming; fermentation; ramie; temperature; textile industry; weight loss
Abstract:
... Microbial treatment of natural fibers is a preferred alternatives in ramie degumming process as compared to conventional chemical degumming technology with alkaline treatment at high temperature. Usually, it is difficult to degrade the noncellulosic components of ramie bast completely with a single strain in the mono-culturing degumming system. Microbial coculture strategy has been widely used in ...
DOI:
10.1080/15440478.2020.1784819

17. An integrated ICP-MS-based analytical approach to fractionate and characterize ionic and nanoparticulate Ce species

Author:
Yingyan Huang; Judy Tsz-Shan Lum; Kelvin Sze-Yin Leung
Source:
Analytical and bioanalytical chemistry 2022 v.414 no.11 pp. 3397-3410
ISSN:
1618-2642
Subject:
alkali treatment; analytical chemistry; bioaccumulation; biotransformation; ceric oxide; human health; ultrafiltration
Abstract:
... Cerium dioxide nanoparticles (CeO₂ NPs) are widely used in various fields, leading to concern about their effect on human health. When conducting in vivo investigations of CeO₂ NPs, the challenge is to fractionate ionic Ce and CeO₂ NPs and to characterize CeO₂ NPs without changing their properties/state. To meet this challenge, we developed an integrated inductively coupled plasma-mass spectrometr ...
DOI:
10.1007/s00216-022-03958-z

18. Annatto (Bixa orellana L.), a potential novel starch source: antioxidant, microstructural, functional, and digestibility properties

Author:
Vianney Cortés-Viguri; Landy Hernández-Rodríguez; Consuelo Lobato-Calleros; Juan C. Cuevas-Bernardino; Blanca Elizabeth Hernández-Rodríguez; Jose Alvarez-Ramirez; E. Jaime Vernon-Carter
Source:
Journal of food measurement & characterization 2022 v.16 no.1 pp. 637-651
ISSN:
2193-4126
Subject:
Bixa orellana; Fourier transform infrared spectroscopy; X-radiation; absorption; alkali treatment; antioxidant activity; antioxidants; circular economy; defatting; digestible carbohydrates; food composition; food industry; gelatinization; measurement; oils; resistant starch; sodium metabisulfite; solubility; viscoelasticity; viscosity; wastes; water uptake
Abstract:
... Bixin and norbixin are extracted from annatto seeds, and the residual seed waste can be used as a potential source of annatto starch (AS), contributing to the circular economy of the regional communities where the resource is grown/processed. To assess AS suitability as a food ingredient, its physicochemical, antioxidant, microstructural, and functional properties were evaluated after being purifi ...
DOI:
10.1007/s11694-021-01228-7

19. Anti‐oxidant and anti‐fatigue properties of apple pomace polysaccharides by acid or alkali extraction

Author:
Xiangna Chang; Xuefeng Chen; Pin Gong; Wenjuan Yang; Lan Wang; Ning Liu; Yao Su; Yuanyuan Zhao
Source:
International journal of food science & technology 2022 v.57 no.1 pp. 78-91
ISSN:
0950-5423
Subject:
alkali treatment; apple pomace; apples; arabinose; food science; galactose; galacturonic acid; glucose; medicine; polysaccharides; rhamnose; structure-activity relationships; xylose
Abstract:
... The anti‐fatigue effects and structure‐activity relationship of apple polysaccharides (APPs), the active components in apple pomace, remain unknown. We examined the effects of different extraction methods on polysaccharide structures and anti‐fatigue activities. Additionally, the structural and biochemical properties of APPs prepared under acidic (ACAPP) or alkaline (ALAPP) conditions, were charac ...
DOI:
10.1111/ijfs.15200

20. Application of Hydrothermal Alkaline Treatment for Destruction of Per- and Polyfluoroalkyl Substances in Contaminated Groundwater and Soil

Author:
Shilai Hao; Youn Jeong Choi; Rula A. Deeb; Timothy J. Strathmann; Christopher P. Higgins
Source:
Environmental science & technology 2022 v.56 no.10 pp. 6647-6657
ISSN:
1520-5851
Subject:
alkali treatment; foams; groundwater; groundwater contamination; mass spectrometry; perfluorocarbons; remediation; soil; soil treatment; sulfonates; temperature; zwitterions
Abstract:
... Hydrothermal alkaline treatment (HALT) can effectively degrade per- and polyfluoroalkyl substances (PFASs) present in aqueous film-forming foam (AFFF). However, information is lacking regarding the treatment of PFASs in actual groundwater and soil from AFFF-impacted sites, especially for complex soil matrices. Given the lack of studies on direct soil treatment for PFAS destruction, we herein appli ...
DOI:
10.1021/acs.est.2c00654

21. Applying ultrasound-assisted processing to obtain cellulose fibres from rice straw to be used as reinforcing agents

Author:
Pedro A.V. Freitas; Chelo González-Martínez; Amparo Chiralt
Source:
Innovative food science & emerging technologies 2022 v.76 pp. 102932
ISSN:
1466-8564
Subject:
alkali treatment; crystal structure; gum arabic; heat; hydrophilicity; methylcellulose; permeability; polymers; rice straw; thermal properties; ultrasonic treatment; ultrasonics; water vapor
Abstract:
... Rice straw (RS) is one of the most globally abundant agro-industrial residues. For its valorisation, a green combined ultrasound-reflux heating method was applied to obtain cellulose fibres (CF) from RS. The new method produced CF with a higher yield (37%) than the alkaline process (29%), more hydrophilic, and with a lower tendency to aggregate. Despite the slightly different degree of purificatio ...
DOI:
10.1016/j.ifset.2022.102932

22. Biodegradable starch / polyvinyl alcohol composites produced by thermoplastic injection containing cellulose extracted from soybean hulls (Glycine max L.)

Author:
Rubiane Bortolatto; Paulo Rodrigo Stival Bittencourt; Fabio Yamashita
Source:
Industrial crops and products 2022 v.176 pp. 114383
ISSN:
0926-6690
Subject:
Glycine max; alkali treatment; biodegradability; cellulose; deformation; dimensional stability; extrusion; feeds; industry; modulus of elasticity; polyvinyl alcohol; shrinkage; soybean hulls; soybeans; starch; synergism; tensile strength; thermoplastics
Abstract:
... Soybean hull is an agro-industrial residue of extensive generation in the soybean oil-producing industry, where approximately 5% of the processed volume of soy beans is converted into hulls. The main use for soy hulls is animal feed, being of great importance to find more ways of consumption for the hulls. This research proposed a noble application for soy hulls: using the hulls as a source for ex ...
DOI:
10.1016/j.indcrop.2021.114383

23. Biomass, lignocellulolytic enzyme production and lignocellulose degradation patterns by Auricularia auricula during solid state fermentation of corn stalk residues under different pretreatments

Author:
Xiaohong Lu; Fei Li; Xia Zhou; Jinrong Hu; Ping Liu
Source:
Food chemistry 2022 v.384 pp. 132622
ISSN:
0308-8146
Subject:
Auricularia auricula; alkali treatment; biodegradation; biomass; carbon; cellulose; corn stover; food chemistry; growth promotion; lignin; lignocellulases; lignocellulose; mycelium; ozone; solid state fermentation
Abstract:
... Current work proposes an innovative substitute cultivation strategy for Auricularia auricula that connects efficient lignocellulose biodegradation of corn stalk by pretreatment with mycelium growth of Auricularia auricula under solid state fermentation. The growth promotion effect of mycelium was as follows: alkali pretreatment > alkali combined with ozone pretreatment > ozone pretreatment > high- ...
DOI:
10.1016/j.foodchem.2022.132622

24. Cellulose nanocrystals from native and mercerized cotton

Author:
Somia Haouache; Clara Jimenez-Saelices; Fabrice Cousin; Xavier Falourd; Bruno Pontoire; Karine Cahier; François Jérome; Isabelle Capron
Source:
Cellulose 2022 v.29 no.3 pp. 1567-1581
ISSN:
0969-0239
Subject:
alkali treatment; cellulose; cellulose nanofibers; chromatography; cotton; crystal structure; hydrolysis; mercerization; molecular weight; nanocrystals; neutrons
Abstract:
... Nanocelluloses occur under various crystalline forms that are currently being selectively used for a wide variety of high performance materials. In the present study, two cellulose nanofibers (CF-I) were mercerized by alkaline treatment (CF-II) without degradation, the same molar mass of 560,000 g/mol was measured. Both samples were acid hydrolyzed, leading to cellulose nanocrystals in native (CNC ...
DOI:
10.1007/s10570-021-04313-8

25. Characterization of Urena lobata Fibers after Alkaline Treatment for Use in Polymer Composites

Author:
Chioma E. Njoku; Joseph A. Omotoyinbo; Kenneth K. Alaneme; Michael O. Daramola
Source:
Journal of natural fibers 2022 v.19 no.2 pp. 485-496
ISSN:
1544-046X
Subject:
Urena lobata; X-ray diffraction; acid soluble lignin; alkali treatment; cellulose; chemical analysis; hemicellulose; lignin
Abstract:
... In this work, treated and untreated Urena lobata fibers were characterized for use in polymer composites. The Urena lobata fibers were extracted by the water retting method and treated with 6 wt% NaOH solution. The influence of the alkaline treatment was characterized by chemical analysis, tensile tests, Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and infrared spectroscopy (FTIR). ...
DOI:
10.1080/15440478.2020.1745127

26. Characterization of a magnetic hybrid film fabricated by the in-situ synthesis of iron oxide nanoparticles into ethyl cellulose polymer

Author:
Jesús Gabino Puente-Córdova; Martín Edgar Reyes-Melo; Beatriz López-Walle; Isaac Yair Miranda-Valdez; Alejandro Torres-Castro
Source:
Cellulose 2022 v.29 no.7 pp. 3845-3857
ISSN:
0969-0239
Subject:
Fourier transform infrared spectroscopy; alkali treatment; crystal structure; ethyl cellulose; films (materials); maghemite; magnetism; magnetite; manufacturing; particle size; polymers; temperature; thermal stability; thermogravimetry; transmission electron microscopy; viscoelasticity
Abstract:
... This study deals with the fabrication and characterization of a magnetic hybrid film, IONP/EC, comprised of iron oxide nanoparticles and ethyl cellulose. Its manufacture followed two steps: the fabrication of a precursor hybrid film, and its alkaline treatment. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), high-resolution transmission electron microscopy (HRTEM), and the ...
DOI:
10.1007/s10570-022-04528-3

27. Characterization of agar extracted from Gracilaria species collected along Tanzanian coast

Author:
Said A.H. Vuai
Source:
Heliyon 2022 v.8 no.2 pp. e09002
ISSN:
2405-8440
Subject:
agar; alkali treatment; coasts; gel strength; Zanzibar
Abstract:
... The study was conducted to investigate the effect of spatial variation, alkali treatment and the volume of extractant on yield and gel strength of agar for three Gracilaria species (G. salicornia, G. edulis and G. corticata) collected from the Tanzanian coast (Dar es Salaam, Tanga and Zanzibar). Treated and untreated G. corticata showed the highest yield (27 ± 0.7 % and 26.2 ± 1.3 % for treated an ...
DOI:
10.1016/j.heliyon.2022.e09002

28. Characterization of raw and alkali treated cellulosic Grewia Flavescens natural fiber

Author:
Yugesh Mani Tiwari; Saroj Kumar Sarangi
Source:
International journal of biological macromolecules 2022 v.209 pp. 1933-1942
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; Grewia; Weibull statistics; alkali treatment; alkalinization; cellulose; crystal structure; temperature; tensile strength; thermal degradation; thermal stability
Abstract:
... The physicochemical, mechanical, thermal as well as morphological characteristics of alkali treated cellulosic Grewia Flavescens are reported in this paper. Using standard test methods, the chemical constituents of Grewia Flavescens fiber (GFF) are evaluated. Fiber treated in 5% (w/v) NaOH for 45 min soaking time is regarded as optimally surface-modified fiber. After optimal alkalization, there is ...
DOI:
10.1016/j.ijbiomac.2022.04.169

29. Comparative life cycle assessment of enhanced anaerobic digestion of agro-industrial waste for biogas production

Author:
Samson Nnaemeka Ugwu; Kevin Harding; Christopher Chintua Enweremadu
Source:
Journal of cleaner production 2022 v.345 pp. 131178
ISSN:
0959-6526
Subject:
agricultural wastes; alkali treatment; anaerobic digestion; biogas; electricity generation; feedstocks; gas production (biological); iron; life cycle assessment; life cycle costing; magnetite; nanocomposites; okra; pyrroles; swine; transportation
Abstract:
... The enhancement of anaerobic digestion improves biogas production, but it has some environmental implications. The need to achieve a trade-off between the energy gains and environmental sustainability necessitated this research. In this study, a comparative assessment of the potential environmental impacts of biogas production from enhanced anaerobic digestion of agro-industrial wastes with differ ...
DOI:
10.1016/j.jclepro.2022.131178

30. Comparison of different extraction methods on the physicochemical, structural properties, and in vitro hypoglycemic activity of bamboo shoot dietary fibers

Author:
Caidie Tang; Liangru Wu; Fusheng Zhang; Jianquan Kan; Jiong Zheng
Source:
Food chemistry 2022 v.386 pp. 132642
ISSN:
0308-8146
Subject:
adsorption; alkali treatment; alpha-amylase; bamboo shoots; crystal structure; food chemistry; glucose; glycemic effect; oils; particle size; protein content; water holding capacity
Abstract:
... The effect of alkali extraction (AE), enzymatic extraction (EE), ultrasonic-assisted enzymatic extraction (UAEE), and shear homogeneous-assisted enzymatic extraction (SHAEE) on the physicochemical, structural properties, and in vitro hypoglycemic activity of bamboo shoot dietary fibers (BSDF) were investigated and compared. BSDF obtained by AE had the lowest protein content and crystallinity index ...
DOI:
10.1016/j.foodchem.2022.132642

31. Comparison of various delignification/desilication pre-treatments and indigenous fungal cellulase for improved hydrolysis of paddy straw

Author:
Nisha Verma; Monica Sachdeva Taggar; Anu Kalia; Jaspreet Kaur; Mohammed Javed
Source:
3 Biotech 2022 v.12 no.7 pp. 150
ISSN:
2190-572X
Subject:
Penicillium; alkali treatment; biofuels; cellulose; delignification; endo-1,4-beta-glucanase; fungi; hemicellulose; hydrolysis; lignin; rice straw; saccharification; silica; sodium hydroxide; sulfuric acid; value added
Abstract:
... The efficient removal of lignin and silica from paddy straw is essential for its volarization into biofuels and other value-added products. In this work, different chemical pre-treatments viz. acid/alkali, organosolv and deep eutectic solvents were carried out to assess the extent of delignification and desilication of paddy straw. Maximum lignin and silica removal of 96.08 and 95.51% was observed ...
DOI:
10.1007/s13205-022-03211-5

32. Comparison on anaerobic phosphorus release and recovery from waste activated sludge by different chemical pretreatment methods: Focus on struvite quality and benefit analysis

Author:
Haiqing Xu; Liang Guo; Mengchun Gao; Yangguo Zhao; Chunji Jin; Junyuan Ji; Zonglian She
Source:
Science of the total environment 2022 v.825 pp. 154110
ISSN:
0048-9697
Subject:
activated sludge; alkali treatment; ammonia; apatite; chromium; cost analysis; crystallization; environment; eutrophication; fermentation; heavy metals; inorganic phosphorus; magnesium ammonium phosphate; mercury; organic phosphorus; pH; polyacrylic acid; rock phosphate; sodium
Abstract:
... Phosphorus recovery from waste activated sludge (WAS) is expected to alleviate the shortage of phosphate rock and reduce eutrophication. In this study, acid, alkali and sodium polyacrylate (PAAS) were compared to enhance phosphorus release and recovery from WAS. During anaerobic fermentation (AF) stage, the optimal pretreated conditions for ortho-phosphate release were the pH of 4 (AF 12 h), 13 (A ...
DOI:
10.1016/j.scitotenv.2022.154110

33. Conditions for efficient alkaline storage of cover crops for biomethane production

Author:
C. Van Vlierberghe; R. Escudié; N. Bernet; G. Santa-Catalina; S. Frederic; H. Carrere
Source:
Bioresource technology 2022 v.348 pp. 126722
ISSN:
0960-8524
Subject:
Helianthus annuus; alkali treatment; biogas; butyric acid; fermentation; methane; rye; silage; storage time
Abstract:
... An innovative process aiming to combine storage and alkali pretreatment of cover crops was investigated using lime as a low cost and environmental friendly reactant. Different lime loadings and Total Solid concentrations (TS) allowed to highlight the abiotic mechanisms of deacetylation during the early stages of the process. Long-term storage experiments of rye and sunflower cover crops at 100 g.k ...
DOI:
10.1016/j.biortech.2022.126722

34. Controlled Instant Pressure Drop (DIC) Pretreatment to Enhance Fractionation and Enzymatic Saccharification of Poppy Capsule Waste

Author:
Sibel Yağcı; Didem Sutay Kocabaş; Merve Köle; Hatice Neval Özbek
Source:
BioEnergy research 2022 v.15 no.1 pp. 426-438
ISSN:
1939-1234
Subject:
alkali treatment; biofuels; biomass; biorefining; enzymatic hydrolysis; fractionation; hemicellulose; hydrolysis; lignocellulose; research; saccharification; vapor pressure; wastes; water content; xylanases; xylooligosaccharides
Abstract:
... Lignocellulosic biomass is an important resource for biofuels, chemicals, and bioproducts; however, deconstructing its recalcitrant structure is a challenge. In this study, controlled instant pressure drop (DIC)-assisted alkaline pretreatment process of poppy capsule waste (PCW) was developed and statistically optimized with the aim of enhanced fractionation efficiency and production of fermentabl ...
DOI:
10.1007/s12155-021-10288-y

35. Distribution, Dissemination and Fate of Antibiotic Resistance Genes During Sewage Sludge Processing—a Review

Author:
Tingting Cui; Siyuan Zhang; Jinyu Ye; Lei Gao; Manjun Zhan; Ran Yu
Source:
Water, air, and soil pollution 2022 v.233 no.4 pp. 138
ISSN:
0049-6979
Subject:
air; alkali treatment; antibiotic resistance; byproducts; coagulation; land application; microbial communities; rain; sewage sludge; soil pollution; wastewater treatment; water
Abstract:
... Sewage sludge, a common by-product of wastewater treatment plants, is one important repository of antibiotic resistance genes (ARGs). The growing demands of sewage sludge reclamation, such as land application, increase the possibility of introducing ARGs into the environment and even the further dissemination of antibiotic resistance. Previous studies have paid much attention to the removal effici ...
DOI:
10.1007/s11270-022-05597-7

36. Effect of Alkali-treatment on Structural, Thermal, Tensile Properties of Dichrostachys Cinerea Bark Fiber and Its Composites

Author:
P.G Baskaran; M Kathiresan; P Pandiarajan
Source:
Journal of natural fibers 2022 v.19 no.2 pp. 433-449
ISSN:
1544-046X
Subject:
Dichrostachys cinerea; alkali treatment; bark; cellulose; chemical analysis; chemical composition; crystal structure; hemicellulose; lignin; tensile strength; thermal stability; topology
Abstract:
... The effect of alkali-treatment of the chemical composition, structure, thermal stability, tensile strength, and surface topology of dichrostachys cinerea bark fibers (DCFs) was analyzed by Chemical analysis, XRD, FTIR, TGA, SEM, and AFM in this investigation. The alkali treatment of raw DCFs with 5% (w/v) NaOH and 90 min of soaking period were recognized to be optimal by the chemical analysis. It ...
DOI:
10.1080/15440478.2020.1745123

37. Effect of Alkalization on Characterization of Ripe Bulrush (Typha Domingensis) Grass Fiber Reinforced Epoxy Composites

Author:
M. Ramesh; C. Deepa; M. Tamil Selvan; K. Hemachandra Reddy
Source:
Journal of natural fibers 2022 v.19 no.3 pp. 931-942
ISSN:
1544-046X
Subject:
Typha domingensis; X-ray diffraction; alkalinization; epoxides; grasses; thermal stability; thermogravimetry
Abstract:
... Ripe Bulrush fibers (RBFs) is one of the grass fibers that have the potential to replace synthetic fibers. This work focuses on the effect of alkalization on characterization of Ripe Bulrush fiber-reinforced composites (RBRCs). The composites are fabricated by compression molding process and the characterization techniques such as Fourier transform infra-red (FTIR) spectroscopy analysis, X-ray dif ...
DOI:
10.1080/15440478.2020.1764443

38. Effect of Fractionation and Processing Conditions on the Digestibility of Plant Proteins as Food Ingredients

Author:
Andrea Rivera del Rio; Remko M. Boom; Anja E. M. Janssen
Source:
Foods 2022 v.11 no.6 pp. -
ISSN:
2304-8158
Subject:
alkali treatment; bioavailability; digestibility; digestible protein; enzymatic hydrolysis; extrusion; fermentation; fractionation; gelation; lentils; meat; oxidation; peas; plant proteins; soybeans; starch
Abstract:
... Plant protein concentrates and isolates are used to produce alternatives to meat, dairy and eggs. Fractionation of ingredients and subsequent processing into food products modify the techno-functional and nutritional properties of proteins. The differences in composition and structure of plant proteins, in addition to the wide range of processing steps and conditions, can have ambivalent effects o ...
DOI:
10.3390/foods11060870

39. Effect of alkali-treated birch sawdust on the lignocellulase secretion and exo-polysaccharide production by Inonotus obliquus under submerged fermentation and its lignocellulose degradation patterns

Author:
Jiaming Zhang; Xiaohong Lu; Zhezhen Zhao; Mengya Wang; Ping Liu
Source:
Journal of bioscience and bioengineering 2022 v.133 no.1 pp. 33-38
ISSN:
1389-1723
Subject:
Betula; Inonotus obliquus; alkali treatment; cellulose; endo-1,4-beta-glucanase; exopolysaccharides; hemicellulose; laccase; lignin; lignocellulases; lignocellulose; medicinal fungi; mycelium; sawdust; secretion; submerged fermentation; xylanases
Abstract:
... The objectives of this study were to investigate the medicinal mushroom Inonotus obliquus on the production of polysaccharides and changes of extracellular lignocellulolytic enzymes during submerged fermentation using alkali-treated birch sawdust as substrate. Meanwhile, in order to explore the degradation mode of lignocellulose in alkali-treated birch sawdust, degradation analysis of three compon ...
DOI:
10.1016/j.jbiosc.2021.09.013

40. Effect of alkaline and benzoyl chloride treatments on the mechanical and morphological properties of sugar palm fiber-reinforced poly(lactic acid) composites

Author:
SFK Sherwani; SM Sapuan; Z Leman; ES Zainudin; A Khalina
Source:
Textile research journal 2022 v.92 no.3-4 pp. 593-607
ISSN:
1746-7748
Subject:
Arenga pinnata; alkali treatment; automobiles; fabrics; impact strength; research
Abstract:
... The present study deals with the effects of alkaline and benzoyl chloride treatments of sugar palm fibers (SPFs) on the mechanical and morphological properties of SPF-reinforced poly(lactic acid) (PLA) composites. Seven different parameters of SPFs were compared, which were untreated, three alkaline solution concentrations of 4%, 5%, and 6% for alkaline treatment, and 50 ml benzoyl chloride-treate ...
DOI:
10.1177/00405175211041878

41. Effect of alkaline treatment on the removal of contaminants of emerging concern from municipal biosolids: Modelling and optimization of process parameters using RSM and ANN coupled GA

Author:
Abiram Karanam Rathankumar; Vasanth Kumar Vaithyanathan; Kongkona Saikia; Srinidhi Sonai Anand; Vinoth Kumar Vaidyanathan; Hubert Cabana
Source:
Chemosphere 2022 v.286 pp. 131847
ISSN:
0045-6535
Subject:
acute toxicity; alkali treatment; biosolids; experimental design; lethal concentration 50; pH; regression analysis; remediation; seasonal variation
Abstract:
... The current study aimed in enhancing the efficiency of alkaline treatment for CECs remediation in biosolids through the application of RSM and ANN. Due to the seasonal variation of CECs in biosolids, a complete CECs profile over a period of three years were performed. Out of 64 targeted CECs, 13 PhACs (70.1 μg/kg) and 10 pesticides (57.2 μg/kg) were detected in biosolids. In order to enhance the r ...
DOI:
10.1016/j.chemosphere.2021.131847

42. Effect of pretreated cow dung fiber on mechanical and shrinkage properties of cementitious composites

Author:
Kang Li; Zhengxian Yang; Yong Zhang; Yuanxiao Li; Lin Lu; Dongyu Niu
Source:
Journal of cleaner production 2022 v.348 pp. 131374
ISSN:
0959-6526
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; agricultural industry; alkali treatment; cellulose; cow manure; crystal structure; hemicellulose; lignin; shrinkage; tensile strength; thermogravimetry; China
Abstract:
... The proper disposal of cow dung waste has always been a great challenge for the agricultural sector in China and around the world. In this work, the cow dung was processed into a cheap renewable cow dung fiber (CDF) and applied into cementitious composites. The physicochemical properties of raw and alkali pretreated CDF were analyzed by thermogravimetry, Fourier transform infrared spectroscopy, X- ...
DOI:
10.1016/j.jclepro.2022.131374

43. Effectiveness of Tannin Removal by Alkaline Pretreatment on Sorghum Ethanol Production

Author:
Franco Foglia; Caye Drapcho; John Nghiem
Source:
Fermentation 2022 v.8 no.6 pp. -
ISSN:
2311-5637
Subject:
Saccharomyces cerevisiae; alkali treatment; bioethanol; corn; dry milling; endo-1,4-beta-glucanase; enzyme activity; ethanol; ethanol production; fermentation; hybrids; mash
Abstract:
... Sorghum has been proposed as a complement or replacement for corn in ethanol production. One difference between sorghum and corn is the presence of tannins, which may affect enzymatic activity. High-tannin sorghum hybrid XM217 was used to analyze the effect of tannin removal by the alkaline pretreatment of sorghum for ethanol production. A laboratory-scale dry-milling process was used on treated s ...
DOI:
10.3390/fermentation8060274

44. Effects of Alkali Treatment on Mechanical Properties of Chicken Feather Fiber/Chitosan Composites for Packaging Applications

Author:
Sara Orkhis; Said Ettaqi
Source:
Waste and biomass valorization 2022 v.13 no.4 pp. 2309-2320
ISSN:
1877-2641
Subject:
Fourier transform infrared spectroscopy; adhesion; alkali treatment; animal wastes; biocomposites; biomass; biopolymers; chickens; chitosan; hydrophilicity; hydrophobicity; light microscopy; shrimp; shrimp shells; tensile strength
Abstract:
... The composite material was made by assembling chitosan and chicken feather fibers. The chitosan with 83% of deacetylation degree was extracted from shrimp crustaceans with chemical treatments. The composites were produced with treated and untreated fibers. The reinforcements were undergone to an alkali treatment, varying the soaking time 2 h, 4 h and 6 h. The biopolymer was analyzed by physical–ch ...
DOI:
10.1007/s12649-021-01630-8

45. Effects of Alkalization on Physical and Mechanical Properties of Biologically Degummed Okra Bast and Corn Husk Fibers

Author:
G. M. Arifuzzaman Khan; Nazire Deniz Yilmaz; Kenan Yilmaz
Source:
Journal of natural fibers 2022 v.19 no.3 pp. 1126-1136
ISSN:
1544-046X
Subject:
alkali treatment; alkalinization; corn husks; okra
Abstract:
... In this study, biologically degummed okra bast and corn husk fibers were subjected to alkalization processes. Alkalization treatments resulted in decrease of linear density of the biologically degummed fibers. Increment in alkali concentration resulted in an initial increase then a successive decrease in all tensile indicators: initial modulus, breaking tenacity and breaking elongation. 3 g/L NaOH ...
DOI:
10.1080/15440478.2020.1798840

46. Effects of HCl Hydrolyzed Cellulose Nanocrystals From Waste Papers on the Hydroxypropyl Methylcellulose/Cationic Starch Biofilms

Author:
Khashayar Vaezi; Ghasem Asadpour
Source:
Waste and biomass valorization 2022 v.13 no.4 pp. 2035-2051
ISSN:
1877-2641
Subject:
X-ray diffraction; alkali treatment; biocompatible materials; biofilm; biomass; crystal structure; deinking; hydrolysis; methylcellulose; nanocomposites; nanocrystals; polymers; solvents; starch
Abstract:
... PURPOSE: The study reports on the preparation of nanocrystalline cellulose from waste papers (WPNCC), as an environmental friendly approach of source material and investigation of their effects on the morphological, mechanical and barrier properties of the Hydroxypropyl methylcellulose/Cationic starch (HPMC/CS) nanocomposites. METHODS: The HCl hydrolysis followed by alkali treatment and deinking o ...
DOI:
10.1007/s12649-021-01651-3

47. Effects of alkali treatment duration on properties of Khlum fiber for application as a reinforcement material

Author:
S. Sarak; P. Boonsuk; A. Sukolrat; J. Mayakun; K. Kaewtatip
Source:
International journal of environmental science and technology 2022 v.19 no.4 pp. 2337-2344
ISSN:
1735-1472
Subject:
acid treatment; adhesion; alkali treatment; cellulose; chemical composition; color; cream; crystal structure; polymers; thermal stability; wastes
Abstract:
... A novel reinforcement material for polymer composites was prepared from Khlum fiber waste. However, the covering materials on the surface of Khlum fiber could hinder the interfacial adhesion reaction between the Khlum fiber and the polymer matrix. To eliminate these covering materials, the Khlum fiber waste was modified with a commonly used alkali treatment. Alkali treatments for 1 h and 2 h were ...
DOI:
10.1007/s13762-021-03302-5

48. Effects of chemical pretreatments on material solubilization of Areca catechu L. husk: Digestion, biodegradability, and kinetic studies for biogas yield

Author:
Adhirashree Vannarath; Arun Kumar Thalla
Source:
Journal of environmental management 2022 v.316 pp. 115322
ISSN:
0301-4797
Subject:
Areca catechu; alkali treatment; anaerobic digestion; betel nut; biodegradability; biogas; biomass; cellulose; chemical oxygen demand; environmental management; equations; ethanol; gas production (biological); hemicellulose; hulls; lignin; lignocellulose; methane; solubilization; temperature
Abstract:
... This study aimed to understand the pretreatment-aided anaerobic digestion of lignocellulosic residues and to assess the substrate solubilization capacity of pretreatment processes. We evaluated the feasibility of biogas production using chemically pretreated Areca catechu L. (Arecanut husk, AH). AH was pretreated for 24h at two different temperatures—25 °C and 90 °C with four different chemicals v ...
DOI:
10.1016/j.jenvman.2022.115322

49. Effects of enzymatic hydrolysis and alkalization pretreatment on biohydrogen production by chlorella photosynthesis

Author:
Hong Liu; Zhiping Zhang; Chaoyang Lu; Jian Wang; Kaixin Wang; Siyi Guo; Quanguo Zhang
Source:
Bioresource technology 2022 v.349 pp. 126859
ISSN:
0960-8524
Subject:
Chlorella vulgaris; alkali treatment; alkalinization; biohydrogen; biomass; enzymatic hydrolysis; equations; hydrogen production; microalgae; photosynthesis; production technology
Abstract:
... The effects of alkalization pretreatment and enzymolysis on biohydrogen production with Chlorella vulgaris microalgae biomass by photosynthesis were studied, the alkalization pretreatment enzymolysis was to alkalize biomass raw materials before enzymolysis, the biohydrogen production kinetics equation of microalgae biomass was put forward by comparing the biohydrogen process of enzymatic hydrolysi ...
DOI:
10.1016/j.biortech.2022.126859

50. Efficient extraction of critical elements from end-of-life automotive catalytic converters via alkaline pretreatment followed by leaching with a complexing agent

Author:
Nazanin Bahaloo-Horeh; Seyyed Mohammad Mousavi
Source:
Journal of cleaner production 2022 v.344 pp. 131064
ISSN:
0959-6526
Subject:
alkali treatment; oxalic acid; platinum; pulp; temperature; wastes
Abstract:
... Spent automotive catalytic converters are one of the fastest-growing waste streams that could be considered as a potential industrially demanded source of platinum group metals (PGMs), rare earth metals (REEs), and other critical elements. In this research, an integrated recycling approach was proposed based on the characteristics of the waste and its refractory nature. The proposed process focuse ...
DOI:
10.1016/j.jclepro.2022.131064