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1. Adsorption of Neutral Red onto Mn-impregnated activated carbons prepared from Typha orientalis

Author:
Zhang, Jian; Shi, Qianqian; Zhang, Chenglu; Xu, Jingtao; Zhai, Bing; Zhang, Bo
Source:
Bioresource technology 2008 v.99 no.18 pp. 8974-8980
ISSN:
0960-8524
Subject:
Typha orientalis; activated carbon; phosphoric acid; manganese; inorganic salts; adsorption; dyes; anions; additives; surface area; porosity; functional properties; lactones; phenols; chemical structure; pH; sorption isotherms; equations; mathematical models; wastewater treatment
Abstract:
... Activated carbon was prepared from an inexpensive and renewable carbon source, Typha orientalis, by H₃PO₄ activation and then impregnated with different Mn salts and tested for its Neutral Red (NR) adsorption capacities. The amount of Mn impregnated in the activated carbon was influenced by the anion species. Impregnation with Mn decreased the surface area, changed the pore size and crystal struct ...
DOI:
10.1016/j.biortech.2008.05.018
PubMed:
18599290

2. Biodiesel synthesis and conformation of lipase from Burkholderia cepacia in room temperature ionic liquids and organic solvents

Author:
Yun Liu; Dawei Chen; Yunjun Yan; Cheng Peng; Li Xu
Source:
Bioresource technology 2011 v.102 no.22 pp. 10414-10418
ISSN:
0960-8524
Subject:
Burkholderia cepacia; anions; biodiesel; cations; mass transfer; solvents; temperature; triacylglycerol lipase
Abstract:
... Biodiesel synthesis and conformation of Burkholderia cepacia lipase (BCL) were studied in 19 different room temperature ionic liquids (RTLLs) with a range of cation and anion structures. Overall, anion selection had a greater influence on biodiesel conversion than cation choice. RTILs containing Tf₂N⁻and PF₆ ⁻ anions were suitable reaction media, while RTIL of [OmPy][BF₄] was the best reaction med ...
DOI:
10.1016/j.biortech.2011.08.056
PubMed:
21955878

3. Biogenic N-P-codoped TiO₂: Synthesis, characterization and photocatalytic properties

Author:
Han, Ting; Fan, Tongxiang; Chow, Suk-Kwun; Zhang, Di
Source:
Bioresource technology 2010 v.101 no.17 pp. 6829-6835
ISSN:
0960-8524
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; anions; cations; crops; crystals; irradiation; lamps; metals; nitrogen; oxides; phosphorus; red light; seeds
Abstract:
... Four typical kinds of crop seeds are studied as non-metallic bio-precursors to synthesize biogenic N-P-codoped TiO₂ (BNP-TiO₂). The as-prepared BNP-TiO₂ samples are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen-adsorption measurement and UV-Vis spectroscopy. The results show that BNP-TiO₂ possesses single anatase phase with mesopore structures, and nitr ...
DOI:
10.1016/j.biortech.2010.03.107

4. Biological catalyzed denitrification by a functional electropolymerization biocarrier modified by redox mediator

Author:
Huijuan Liu; Jianbo Guo; Jiuhui Qu; Jing Lian; Yankai Guo; William Jefferson; Jingliang Yang
Source:
Bioresource technology 2012 v.107 no. pp. 144-150
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; Raman spectroscopy; anions; carbon; catalytic activity; denitrification; durability; electrodes; scanning electron microscopes
Abstract:
... Electropolymerization biocarriers were prepared by the electropolymerization of polypyrrole (PPy) on an active carbon felt (ACF) electrode using doping anions anthraquinone-2-sulfonate (AQS) or Na₂SO₄. The functional electropolymerization biocarrier (ACF/PPy/AQS) with AQS was used as an immobilized redox mediator for the denitrification process. The characteristics of the electropolymerization bio ...
DOI:
10.1016/j.biortech.2011.12.071
PubMed:
22257858

5. Biosorbents prepared from wood particles treated with anionic polymer and iron salt: Effect of particle size on phosphate adsorption

Author:
Eberhardt, Thomas L.; Min, Soo-Hong
Source:
Bioresource technology 2008 v.99 no.3 pp. 626-630
ISSN:
0960-8524
Subject:
adsorbents; anions; polymers; iron; phosphates; adsorption; water pollution; carboxymethylcellulose
Abstract:
... Biomass-based adsorbents have been widely studied as a cost-effective and environmentally-benign means to remove pollutants and nutrients from water. A two-stage treatment of aspen wood particles with solutions of carboxymethyl cellulose (CMC) and ferrous chloride afforded a biosorbent that was effective in removing phosphate from test solutions. FTIR spectroscopy of the biosorbent samples showed ...
Handle:
10113/13294
DOI:
10.1016/j.biortech.2006.12.037
PubMed:
17336059

6. Building a better Mousetrap I: Using Design of Experiments with unconfounded ions to discover superior media for growth and lipid production by Chlorella sp. EN1234

Author:
Patrick C. Hallenbeck; Melanie Grogger; Megan Mraz; Donald Veverka
Source:
Bioresource technology 2015 v.184 pp. 82-89
ISSN:
0960-8524
Subject:
Chlorella; ammonium compounds; anions; biomass production; cations; chlorides; culture media; experimental design; lipid content; lipids; nitrates; nitrogen; nitrogen content; phosphates; potassium; sodium
Abstract:
... An unconfounded Scheffe Mix approach was used to probe important ions and their interactions in supporting biomass and lipid production by Chlorella sp. EN1234. Six major cations and anions; NH4+, NO3−, Na+, K+ PO4− and Cl− were examined. Piepel plots and RSM analysis showed that in a number of cases, the major media anions PO4− and Cl− negatively influence final cell densities, and that maximal c ...
DOI:
10.1016/j.biortech.2014.10.144

7. Competitive migration behaviors of multiple ions and their impacts on ion-exchange resin packed microbial desalination cell

Author:
Kuichang Zuo; Lulu Yuan; Jincheng Wei; Peng Liang; Xia Huang
Source:
Bioresource technology 2013 v.146 pp. 637-642
ISSN:
0960-8524
Subject:
anions; cations; desalination; electrical conductivity; electrodes; hardness; ion exchange; resins; salts
Abstract:
... Mixed ion-exchange resins packed microbial desalination cell (R-MDC) could stabilize the internal resistance, however, the impacts of multiple ions on R-MDC performance was unclear. This study investigated the desalination performance, multiple ions migration behaviors and their impacts on R-MDCs fed with salt solution containing multiple anions and cations. Results showed that R-MDC removed multi ...
DOI:
10.1016/j.biortech.2013.07.139
PubMed:
23982060

8. Design and application of a novel ionic liquid with the property of strengthening coenzyme regeneration for whole-cell bioreduction in an ionic liquid-distilled water medium

Author:
Jun Li; Pu Wang; Jin Huang; Jia Sun
Source:
Bioresource technology 2015 v.175 pp. 42-50
ISSN:
0960-8524
Subject:
anions; catalytic activity; cationic surfactants; cations; cysteine; ethanol; ionic liquids; tetramethylammonium compounds
Abstract:
... Focusing on the task-specific properties of ionic liquids (ILs), a novel IL was designed by combining the quaternary ammonium cationic surfactant, [N1,1,1,1]+, with benign amino acid anion ([Cys]−), and was successfully employed in whole-cell-catalyzed bioreduction by Trichodermaasperellum ZJPH0810 using an ionic liquid-distilled water medium. As expected, based on better understanding about the e ...
DOI:
10.1016/j.biortech.2014.10.059

9. Development and optimization of single and combined detoxification processes to improve the fermentability of lignocellulose hydrolyzates

Author:
Daniel Ludwig; Manfred Amann; Thomas Hirth; Steffen Rupp; Susanne Zibek
Source:
Bioresource technology 2013 v.133 pp. 455-461
ISSN:
0960-8524
Subject:
Coriolus versicolor; anions; aqueous solutions; detoxification (processing); laccase; lignocellulose; phenolic acids; polymerization; reaction kinetics; wheat straw
Abstract:
... In this work, an enzyme catalyzed detoxification process of lignocellulose hydrolyzates with immobilized laccase from Trametes versicolor was developed and optimized. Further, the immobilized laccase significantly reduced the amount of toxic phenolic compounds in the xylan rich fraction (XRF) by polymerization within 1h. The insoluble products precipitated onto the carrier surface and could be rev ...
DOI:
10.1016/j.biortech.2013.01.053
PubMed:
23454802

10. Effects of ions and phosphates on alkaline phosphatase activity in aerobic activated sludge system

Author:
Xie, Chunsheng; Lu, Rongjie; Huang, Yan; Wang, Qian; Xu, Xinhua
Source:
Bioresource technology 2010 v.101 no.10 pp. 3394-3399
ISSN:
0960-8524
Subject:
activated sludge; alkaline phosphatase; anions; heavy metals; metal ions; models; phosphates; phosphorus; wastewater; wastewater treatment
Abstract:
... The influence of metal ions, anions, ortho-phosphate, polyphosphate and organic phosphorus on the activity and kinetics of alkaline phosphatase in aerobic activated sludge taken from a local municipal wastewater treatment plant was investigated. Results suggested that there were three impact models of heavy metals on alkaline phosphatase activity (APA) and most inorganic anions were relatively inn ...
DOI:
10.1016/j.biortech.2009.12.047
PubMed:
20093006

11. Effects of selected ionic liquids on lipid production by the oleaginous yeast Rhodosporidium toruloides

Author:
Qitian Huang; Qian Wang; Zhiwei Gong; Guojie Jin; Hongwei Shen; Shan Xiao; Haibo Xie; Shuhong Ye; Jihui Wang; Zongbao K. Zhao
Source:
Bioresource technology 2013 v.130 pp. 339-344
ISSN:
0960-8524
Subject:
cell growth; residual effects; yeasts; lipids; anions; pH; biotransformation; Rhodosporidium; technology
Abstract:
... Lignocellulosic biomass pretreatment with ionic liquids (ILs) has been emerged as a new technology, but the effects of residual ILs on the downstream biotransformation remain largely unknown. Here, three typical ILs were tested for their effects on lipid production by the oleaginous yeast Rhodosporidium toruloides AS 2.1389. When cultures were maintained at pH 6.0 in the presence of 30mM ILs, [Emi ...
DOI:
10.1016/j.biortech.2012.12.022
PubMed:
23313678

12. Effects of temperature and pH on adsorption of basic brown 1 by the bacterial biopolymer poly(γ-glutamic acid)

Author:
Inbaraj, B. Stephen; Chiu, C.P.; Ho, G.H.; Yang, J.; Chen, B.H.
Source:
Bioresource technology 2008 v.99 no.5 pp. 1026-1035
ISSN:
0960-8524
Subject:
acids; activation energy; adsorption; anions; biopolymers; dyes; energy; entropy; equations; ion exchange; models; pH; sorption isotherms; temperature
Abstract:
... Poly(γ-glutamic acid) (γ-PGA), an extracellular polymeric substance (EPS) synthesized by Bacillus species, was explored to study its interaction with the basic brown 1 dye by conducting a systematic batch adsorption study as affected by two critical parameters, temperature and pH. Adsorption isotherms were closely predicted by Temkin equation among the eight isotherm models tested. The rate of ads ...
DOI:
10.1016/j.biortech.2007.03.008

13. Efficient removal of Cr(VI) from water by quaternized chitin/branched polyethylenimine biosorbent with hierarchical pore structure

Author:
Xingtang Liang; Xiaoyu Fan; Runmei Li; Shirong Li; Shukun Shen; Daodao Hu
Source:
Bioresource technology 2018 v.250 pp. 178-184
ISSN:
0960-8524
Subject:
adsorption; amines; ammonium; anions; biosorbents; biosorption; chitin; chromium; crosslinking; electrostatic interactions; epichlorohydrins; kinetics; pH; polyethyleneimine; sorption isotherms
Abstract:
... A novel chitin-based biosorbent (QCP) was synthesized by cross-linking quaternized chitin and branched polyethylenimine with the aid of epichlorohydrin for efficient removal of Cr(VI) from water. Because it possessed both quaternary ammonium groups and amino groups as well as the hierarchical pore structure, QCP presented a maximum adsorption capacity of 387.7 mg/g according to the Langmuir isothe ...
DOI:
10.1016/j.biortech.2017.10.071

14. Efficient simultaneous removal of cadmium and arsenic in aqueous solution by titanium-modified ultrasonic biochar

Author:
Mingke Luo; Hai Lin; Yinhai He; Bing Li; Yingbo Dong; Liang Wang
Source:
Bioresource technology 2019 v.284 pp. 333-339
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; anions; aqueous solutions; arsenic; biochar; biosorbents; cadmium; cations; energy-dispersive X-ray analysis; ion exchange; pH; scanning electron microscopy; sorbents; surface area; titanium dioxide; ultrasonics; wastewater
Abstract:
... Simultaneous removal of cations and anions in wastewater has always been a great concerned environmental problem. In this study, a friendly and inexpensive biosorbent to simultaneously remove Cd(II) and As(V) from aqueous solution was synthesized by ultrasonic biochar and nanoscale TiO2 (TD), and the obtained sorbent was named as BCTD. The maximum sorption capacities of Cd (72.62 mg/g) and As (118 ...
DOI:
10.1016/j.biortech.2019.03.108

15. Engineered hydrochar composites for phosphorus removal/recovery: Lanthanum doped hydrochar prepared by hydrothermal carbonization of lanthanum pretreated rice straw

Author:
Lichun Dai; Bo Wu; Furong Tan; Mingxiong He; Wenguo Wang; Han Qin; Xiaoyu Tang; Qili Zhu; Ke Pan; Qichun Hu
Source:
Bioresource technology 2014 v.161 pp. 327-332
ISSN:
0960-8524
Subject:
adsorbents; adsorption; adverse effects; anions; hydrochars; hydrothermal carbonization; lanthanum; pH; phosphorus; rice straw; sorption isotherms; synergism; wastewater
Abstract:
... Engineered hydrochar composites (EHC) were synthesized by hydrothermal carbonization (HTC) of lanthanum pretreated rice straw. The as-prepared composite with about 30% lanthanum content showed greater P removal potential than La(OH)3, indicating the synergistic effect of hydrochar and lanthanum in P removal. The adsorption results showed that EHC showed great P adsorption capacities (>50mgPg−1) in ...
DOI:
10.1016/j.biortech.2014.03.086

16. Esters production via carboxylates from anaerobic paper mill wastewater treatment

Author:
Carlos I. Cabrera-Rodríguez; Mónica Moreno-González; Florence A. de Weerd; Vidhvath Viswanathan; Luuk A.M. van der Wielen; Adrie J.J. Straathof
Source:
Bioresource technology 2017 v.237 pp. 186-192
ISSN:
0960-8524
Subject:
acetates; adsorption; anaerobic digestion; anion exchange resins; anions; bicarbonates; butyrates; calcium; cations; desorption; esterification; lactic acid; methanol; pH; propionic acid; pulp and paper mills; wastewater; wastewater treatment
Abstract:
... This paper describes a new option for integrated recovery and esterification of carboxylates produced by anaerobic digestion at a pH above the pKa. The carboxylates (acetate, propionate, butyrate, valerate and lactate) are recovered using a strong anion exchange resin in the bicarbonate form, and the resin is regenerated using a CO2-expanded alcohol technique, which allows for low chemicals consum ...
DOI:
10.1016/j.biortech.2017.02.030

17. Evaluation of a new peat-based sorbent for metals capture

Author:
Al-Faqih, Laith; Johnson, Pauline D.; Allen, Stephen J.
Source:
Bioresource technology 2008 v.99 no.5 pp. 1394-1402
ISSN:
0960-8524
Subject:
anions; heavy metals; industrial wastes; ion exchange; leaching; pH; sorption; sorption isotherms; stormwater; water content
Abstract:
... A new peat-based sorbent was evaluated for the capture of heavy metals from waste streams. The media is a pelletted blend of organic humic material targeted for the capture of soluble metals from industrial waste streams and stormwater. The metals chosen for the media evaluation were Cd, Cu, Ni, and Zn due to their occurrence and abundance in waste streams and runoff. Sorption tests included an ev ...
DOI:
10.1016/j.biortech.2007.01.059
PubMed:
17448654

18. Feasibility of iron loaded ‘okara’ for biosorption of phosphorous in aqueous solutions

Author:
T.A.H. Nguyen; H.H. Ngo; W.S. Guo; J. Zhang; S. Liang; K.L. Tung
Source:
Bioresource technology 2013 v.150 pp. 42-49
ISSN:
0960-8524
Subject:
adsorption; anions; aqueous solutions; biosorption; byproducts; iron; models; pH; phosphorus; soybeans; wastewater
Abstract:
... This study investigated the feasibility of using soybean milk by-products (okara) as a sustainable biosorbent for phosphate removal in water and wastewater. The results show that raw okara could hardly decontaminate phosphate from aqueous solutions. Hence, in this work, okara was modified by being cationized using FeCl3 0.25M (namely iron loaded okara, ILO) to enhance the phosphorus adsorption cap ...
DOI:
10.1016/j.biortech.2013.09.133
PubMed:
24144598

19. Heat-treated Escherichia coli as a high-capacity biosorbent for tungsten anions

Author:
Takashi Ogi; Takahiko Makino; Ferry Iskandar; Eishi Tanabe; Kikuo Okuyama
Source:
Bioresource technology 2016 v.218 pp. 140-145
ISSN:
0960-8524
Subject:
Escherichia coli; adsorption; amino acids; anions; biosorbents; biosorption; cell suspension culture; free amino acids; heat treatment; quantitative analysis; tungsten; zeta potential
Abstract:
... Adsorption performance in the biosorption of tungsten using Escherichia coli cells can be significantly improved by using cell suspensions that have been heat-treated at ⩽100°C. In the case of E. coli cells suspension heated at 100°C, the aqueous tungsten ions concentration rapidly decreased from 0.8mmol/L to practically zero within 1h. This biosorption time is much shorter than that of non-heat t ...
DOI:
10.1016/j.biortech.2016.06.076

20. High organic loading treatment for industrial molasses wastewater and microbial community shifts corresponding to system development

Author:
Kyohei Kuroda; Tomoaki Chosei; Nozomi Nakahara; Masashi Hatamoto; Takashi Wakabayashi; Toshikazu Kawai; Nobuo Araki; Kazuaki Syutsubo; Takashi Yamaguchi
Source:
Bioresource technology 2015 v.196 pp. 225-234
ISSN:
0960-8524
Subject:
acidification; anions; bacteria; biochemical oxygen demand; biological treatment; cations; chemical oxygen demand; community structure; microbial communities; molasses; organic compounds; sludge; wastewater; wastewater treatment
Abstract:
... Molasses wastewater contains high levels of organic compounds, cations, and anions, causing operational problems for anaerobic biological treatment. To establish a high organic loading treatment system for industrial molasses wastewater, this study designed a combined system comprising an acidification tank, a thermophilic multi-stage (MS)-upflow anaerobic sludge blanket (UASB) reactor, mesophilic ...
DOI:
10.1016/j.biortech.2015.07.070

21. High-efficiency cell disruption and astaxanthin recovery from Haematococcus pluvialis cyst cells using room-temperature imidazolium-based ionic liquid/water mixtures

Author:
Sun-A Choi; You-Kwan Oh; Jiye Lee; Sang Jun Sim; Min Eui Hong; Ji-Yeon Park; Min-Sik Kim; Seung Wook Kim; Jin-Suk Lee
Source:
Bioresource technology 2019 v.274 pp. 120-126
ISSN:
0960-8524
Subject:
Haematococcus pluvialis; ambient temperature; anions; antioxidants; astaxanthin; energy conservation; hexane; ionic liquids; lipids; sulfates
Abstract:
... Energy-saving, high-efficiency cell disruption is a critical step for recovery of thermolabile antioxidant astaxanthin from Haematococcus pluvialis cyst cells of rigid cell-wall structure. In this study, as room-temperature green solvents, 10 types of 1-ethyl-3-methylimidazolium ([Emim])-based ionic liquids (ILs) were compared and evaluated for their abilities to disrupt H. pluvialis cyst cells fo ...
DOI:
10.1016/j.biortech.2018.11.082

22. Hydrothermal decomposition of glucose and fructose with inorganic and organic potassium salts

Author:
Xiaoyu Wu; Jie Fu; Xiuyang Lu
Source:
Bioresource technology 2012 v.119 no. pp. 48-54
ISSN:
0960-8524
Subject:
anions; bromides; chlorides; equations; fluorides; fructose; glucose; hydroxymethylfurfural; inorganic acids; iodides; nitrates; organic salts; phosphates; sulfates
Abstract:
... The effects of 15 inorganic and organic acid potassium salts on hydrothermal decomposition of glucose, fructose and 5-hydroxymethylfurfural (5-HMF) were investigated at 180°C. The rate constants for glucose, fructose and 5-HMF decomposition with anions were calculated by a pseudo first-order equation, and the impact factors of the rate constants were calculated, to demonstrate the catalytic effect ...
DOI:
10.1016/j.biortech.2012.05.113
PubMed:
22728181

23. Immobilizing Cr3+ with SO3H-functionalized solid polymeric ionic liquids as efficient and reusable catalysts for selective transformation of carbohydrates into 5-hydroxymethylfurfural

Author:
Hu Li; Qiuyun Zhang; Xiaofang Liu; Fei Chang; Yuping Zhang; Wei Xue; Song Yang
Source:
Bioresource technology 2013 v.144 pp. 21-27
ISSN:
0960-8524
Subject:
anions; atmospheric pressure; catalysts; catalytic activity; cellulose; fructose; glucose; hydroxymethylfurfural; ion exchange resins; melting point; metals; silica; solvents
Abstract:
... A series of functional polymeric ionic liquids (FPILs) were prepared by coupling of SO3H-functionalized polymeric ionic liquids with different counterpart anions containing or excluding CrCl3·6H2O, and characterized by SEM, FT-IR, XRD, NH3-TPD, TG, melting point, ICP-AES, and TEM. The catalytic activity of the prepared solid FPILs was investigated for the conversion of biomass including fructose, ...
DOI:
10.1016/j.biortech.2013.06.063

24. Influence of two different alcohols in the esterification of fatty acids over layered zinc stearate/palmitate

Author:
Eduardo José Mendes de Paiva; Marcos Lúcio Corazza; Maria Rita Sierakowski; Johan Wärnå; Dmitry Yu. Murzin; Fernando Wypych; Tapio Salmi
Source:
Bioresource technology 2015 v.193 pp. 337-344
ISSN:
0960-8524
Subject:
activation energy; anions; catalysts; esterification; ethanol; ionic liquids; models; palmitates; stearic acid; temperature; zinc
Abstract:
... In this work, esterification of fatty acids (oleic, linoleic and stearic acid) with a commercial zinc carboxylate (a layered compound formed by simultaneous intercalation of stearate and palmitate anions) was performed. Kinetic modeling using a quasi-homogeneous approach successfully fitted experimental data at different molar ratio of fatty acids/alcohols (1-butanol and 1-hexanol) and temperature ...
DOI:
10.1016/j.biortech.2015.06.079

25. Lignin dissolution in dialkylimidazolium-based ionic liquid–water mixtures

Author:
Yantao Wang; Ligang Wei; Kunlan Li; Yingchong Ma; Ningning Ma; Shan Ding; Linlin Wang; Deyang Zhao; Bing Yan; Wenying Wan; Qian Zhang; Xin Wang; Junmei Wang; Hui Li
Source:
Bioresource technology 2014 v.170 pp. 499-505
ISSN:
0960-8524
Subject:
acetates; anions; bromides; bromine; cations; ionic liquids; lignin; solubility
Abstract:
... Lignin dissolution in dialkylimidazolium-based ionic liquid (IL)–water mixtures (40wt%–100wt% IL content) at 60°C was investigated. The IL content and type are found to considerably affect lignin solubility. For the IL–water mixtures except 1-butyl-3-methylimidazolium tetrafluoroborate ([C4C1im]BF4), the maximum lignin solubility can be achieved at 70wt% IL content. Lignin solubility in IL–water m ...
DOI:
10.1016/j.biortech.2014.08.020

26. Novel betaine-amino acid based natural deep eutectic solvents for enhancing the enzymatic hydrolysis of corncob

Author:
Yuan Liang; Wenjing Duan; Xiaoxi An; Yingyun Qiao; Yuanyu Tian; Haifeng Zhou
Source:
Bioresource technology 2020 v.310 pp. 123389
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; amino acids; anions; betaine; biomass; cations; cellulose; corn cobs; digestibility; enzymatic hydrolysis; lignin; nuclear magnetic resonance spectroscopy; solubility; solvents; water content; xylan
Abstract:
... A novel natural deep eutectic solvent (NDES) with water content ranging from 65 to 93 wt%, in which betaine (Bet) acts as the cation and amino acids (AAs) as the anions, was prepared by a simple and green chemical route. [Bet][AA] NDES showed excellent xylan and lignin solubility, however, scare cellulose solubility. A mild and facile pretreatment process with [Bet][AA] NDES was carried out at 60  ...
DOI:
10.1016/j.biortech.2020.123389

27. One-pot synthesis of levulinic acid from cellulose in ionic liquids

Author:
Yue Shen; Jian-Kui Sun; Yu-Xuan Yi; Bo Wang; Feng Xu; Run-Cang Sun
Source:
Bioresource technology 2015 v.192 pp. 812-816
ISSN:
0960-8524
Subject:
acidity; anions; catalytic activity; cellulose; chlorides; ionic liquids; levulinic acid; sulfates; synthesis
Abstract:
... A simple and effective route for the production of levulinic acid (LA) from cellulose has been developed in SO3H-functionalized ionic liquids. The effects of ionic liquid structures, reaction conditions and combination of metal chlorides with ILs on the yield of LA were investigated, where the highest yield of 39.4% was obtained for 120min in the presence of 1-(4-sulfonic acid) butyl-3-methylimida ...
DOI:
10.1016/j.biortech.2015.05.080

28. Organic ionic salt draw solutions for osmotic membrane bioreactors

Author:
Katie S. Bowden; Andrea Achilli; Amy E. Childress
Source:
Bioresource technology 2012 v.122 no. pp. 207-216
ISSN:
0960-8524
Subject:
anions; biodegradation; bioreactors; carbon; diffusivity; laboratory techniques; magnesium chloride; organic salts; screening; sodium chloride
Abstract:
... This investigation evaluates the use of organic ionic salt solutions as draw solutions for specific use in osmotic membrane bioreactors. Also, this investigation presents a simple method for determining the diffusion coefficient of ionic salt solutions using only a characterized membrane. A selection of organic ionic draw solutions underwent a desktop screening process before being tested in the l ...
DOI:
10.1016/j.biortech.2012.06.026
PubMed:
22771022

29. Preferring cellulose of Eichhornia crassipes to prepare xanthogenate to other plant materials and its adsorption properties on copper

Author:
Tan, Liangfeng; Zhu, Duanwei; Zhou, Wenbing; Mi, Weijie; Ma, Lixiao; He, Wenting
Source:
Bioresource technology 2008 v.99 no.10 pp. 4460-4466
ISSN:
0960-8524
Subject:
Eichhornia crassipes; adsorption; anions; cellulose; copper; equations; pH; sodium
Abstract:
... Choosing bio-material of Eichhornia crassipes from five plant materials through comparison on their exchangeable capacity to copper and carboxyl content, cellulose xanthogenate was prepared by raw fiber of E. crassipes with NaOH and CS₂. The exchange adsorption properties of the product on copper were investigated and the optimum preparing condition was obtained. The results showed that the adsorp ...
DOI:
10.1016/j.biortech.2007.08.022
PubMed:
17928220

30. Preparation of agricultural by-product based anion exchanger and its utilization for nitrate and phosphate removal

Author:
Xu, Xing; Gao, Bao-Yu; Yue, Qin-Yan; Zhong, Qian-Qian
Source:
Bioresource technology 2010 v.101 no.22 pp. 8558-8564
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; adsorption; amines; anions; aqueous solutions; byproducts; nitrates; nitrogen content; nuclear magnetic resonance spectroscopy; phosphates; resins; temperature; wheat straw
Abstract:
... To develop the agricultural by-product adsorbent that possesses anionic exchangeable function, the performance of a new anion exchanger prepared from wheat straw (WS) was evaluated in this study. Wheat straw anion exchanger (WS-AE) was prepared by the grafting of aminated intermediate onto WS. Results indicate that reaction time and temperature in the chemical modification process both affected th ...
DOI:
10.1016/j.biortech.2010.06.060
PubMed:
20599377

31. Preparation, characterization, adsorption kinetics and thermodynamics of novel magnetic chitosan enwrapping nanosized γ-Fe₂O₃ and multi-walled carbon nanotubes with enhanced adsorption properties for methyl orange

Author:
Zhu, H.Y.; Jiang, R.; Xiao, L.; Zeng, G.M.
Source:
Bioresource technology 2010 v.101 no.14 pp. 5063-5069
ISSN:
0960-8524
Subject:
adsorption; anions; carbon nanotubes; chitosan; crosslinking; energy; enthalpy; entropy; magnetic fields; models; pH; sorption isotherms; temperature
Abstract:
... A novel magnetic composite bioadsorbent composed of chitosan wrapping magnetic nanosized γ-Fe₂O₃ and multi-walled carbon nanotubes (m-CS/γ-Fe₂O₃/MWCNTs) was prepared under relative mild conditions and was characterized. Adsorption of methyl orange (MO) onto m-CS/γ-Fe₂O₃/MWCNTs was investigated with respect to pH, initial MO concentration, coexisting anions and temperature. Results of characterizat ...
DOI:
10.1016/j.biortech.2010.01.107

32. Product-oriented decomposition of lignocellulose catalyzed by novel polyoxometalates-ionic liquid mixture

Author:
Nan Shi; Dong Liu; Qiang Huang; Zhongshan Guo; Ruixue Jiang; Feng Wang; Qingtai Chen; Min Li; Guobo Shen; Fushan Wen
Source:
Bioresource technology 2019 v.283 pp. 174-183
ISSN:
0960-8524
Subject:
acids; aldehydes; anions; catalysts; esters; ionic liquids; ketones; lignocellulose; liquids; oxidants; phenols; temperature
Abstract:
... Lignocellulose was oxidatively decomposed in a newly developed polyoxometalates-imidazolium ionic liquid mixture. Aromatic compounds covering acids, esters, ketones, aldehydes, and phenols were selectively produced under various conditions. 4-Hydroxylbenzoic acid was dominatingly yielded under low temperature and high oxidant concentration. Phenolic compounds were mainly generated at high temperat ...
DOI:
10.1016/j.biortech.2019.03.048

33. Removal and recovery of phosphorus from water by means of adsorption onto orange waste gel loaded with zirconium

Author:
Biswas, Biplob K.; Inoue, Katsutoshi; Ghimire, Kedar N.; Harada, Hiroyuki; Ohto, Keisuke; Kawakita, Hidetaka
Source:
Bioresource technology 2008 v.99 no.18 pp. 8685-8690
ISSN:
0960-8524
Subject:
oranges; plant byproducts; food processing wastes; water pollution; eutrophication; phosphorus; adsorption; gels; zirconium; remediation; kinetics; pH; anions; sorption isotherms; phosphates; sodium hydroxide; continuous systems; waste utilization
Abstract:
... Orange waste, an available biomass, was immobilized with zirconium(IV) to investigate its feasibility for phosphate removal from an aquatic environment. Kinetics, effects of pH and foreign anions, and the adsorption isotherm for phosphate have been examined. The adsorption capacity has been compared to that of two commercially available adsorbents such as zirconium ferrite and MUROMAC XMC 3614. Th ...
DOI:
10.1016/j.biortech.2008.04.015
PubMed:
18524574

34. Removal of chromium(VI) from water and wastewater using surfactant modified coconut coir pith as a biosorbent

Author:
Namasivayam, C.; Sureshkumar, M.V.
Source:
Bioresource technology 2008 v.99 no.7 pp. 2218-2225
ISSN:
0960-8524
Subject:
adsorbents; adsorption; agricultural wastes; anions; bromides; chromium; coconuts; coir; effluents; pith; surfactants
Abstract:
... Coconut coir pith, an agricultural solid waste was used as biosorbent for the removal of chromium(VI) after modification with a cationic surfactant, hexadecyltrimethylammonium bromide. Optimum pH for Cr(VI) adsorption was found to be 2.0. Reduction of Cr(VI) to Cr(III) occurred to a slight extent during the removal. Langmuir, Freundlich and Dubinin Radushkevich (D-R) isotherms were used to model t ...
DOI:
10.1016/j.biortech.2007.05.023
PubMed:
17601729

35. Selective conversion of cellulose to levulinic acid via microwave-assisted synthesis in ionic liquids

Author:
Huifang Ren; Yonggui Zhou; Li Liu
Source:
Bioresource technology 2013 v.129 pp. 616-619
ISSN:
0960-8524
Subject:
acidity; anions; catalysts; catalytic activity; cellulose; esterification; levulinic acid
Abstract:
... A highly selective approach to produce levulinic acid from cellulose was developed via microwave-assisted synthesis in SO3H-functionalized ionic liquids (SFILs). The effects of reaction conditions and ionic liquid structures on the yield of levulinic acid have been investigated, where the highest yield of 55.0% was obtained. The catalytic activities of SFILs depend on the anions and decrease in th ...
DOI:
10.1016/j.biortech.2012.12.132
PubMed:
23337540

36. Sorption of Pb(II) onto a mixture of algae waste biomass and anion exchanger resin in a packed-bed column

Author:
Dumitru Bulgariu; Laura Bulgariu
Source:
Bioresource technology 2013 v.129 pp. 374-380
ISSN:
0960-8524
Subject:
effluents; resins; lead; continuous systems; models; anions; pH; biomass; wastewater; desorption
Abstract:
... Sorption of Pb(II) was studied by using a biosorbent mixture of algae waste biomass and Purolite A-100 resin in a packed-bed column. Mixing these two components was done to prevent the clogging of the column and to ensure adequate flow rates. Increasing of solution flow rate and initial Pb(II) concentration make that the breakthrough and saturation points to be attained earlier. The experimental b ...
DOI:
10.1016/j.biortech.2012.10.142
PubMed:
23262014

37. Study of the adsorption of Cr(VI) by tannic acid immobilised powdered activated carbon from micro-polluted water in the presence of dissolved humic acid

Author:
Xujin Gong; Weiguang Li; Ke Wang; Jinhua Hu
Source:
Bioresource technology 2013 v.141 pp. 145-151
ISSN:
0960-8524
Subject:
activated carbon; adsorption; anions; chromium; humic acids; pH; sorption isotherms; tannins
Abstract:
... The adsorption of Cr(VI) (0.500mg/L) onto food-grade tannic-acid immobilised powdered activated carbon (TA-PAC) in the presence of dissolved humic acid (DHA) was investigated at 280K as a function of pH, along with the adsorption capacities and the adsorption isotherms for chromium ions. The results showed that the presence of DHA improved the adsorption capacities of Cr(VI) and its reduction prod ...
DOI:
10.1016/j.biortech.2013.01.166
PubMed:
23453800

38. Surface modification of Corynebacterium glutamicum for enhanced Reactive Red 4 biosorption

Author:
Mao, Juan; Won, Sung Wook; Vijayaraghavan, K.; Yun, Yeoung-Sang
Source:
Bioresource technology 2009 v.100 no.3 pp. 1463-1466
ISSN:
0960-8524
Subject:
Corynebacterium glutamicum; anions; biomass; cell walls; crosslinking; desorption; models; pH; primary amines; reactive dyes
Abstract:
... This study reports the possibility of enhancing the reactive dye biosorption capacity of Corynebacterium glutamicum via its cross-linking with polyethylenimine (PEI). The amine groups in the cell wall of C. glutamicum were found to electrostatically interact with reactive dye anions. Thus, cross-linking the biomass with PEI enhanced the primary and secondary amine groups, thereby increased the bio ...
DOI:
10.1016/j.biortech.2008.07.053
PubMed:
18782665

39. Synergistic conversion of glucose into 5-hydroxymethylfurfural in ionic liquid–water mixtures

Author:
Xinhua Qi; Masaru Watanabe; Taku M. Aida; Richard L. Smith
Source:
Bioresource technology 2012 v.109 no. pp. 224-228
ISSN:
0960-8524
Subject:
anions; catalysts; chlorides; ethanol; fructose; glucose; hydroxymethylfurfural; methanol; solvents
Abstract:
... A method for converting glucose into 5-hydroxymethylfurfural (5-HMF) without using chromium-containing catalysts was developed. The method uses ionic liquid–water mixtures with a ZrO₂ catalyst. Addition of a certain amount of water (10–50wt.%) into the 1,3-dialkylimidazolium chloride ionic liquid promoted the formation of 5-HMF from glucose compared with that in either pure water or in the pure io ...
DOI:
10.1016/j.biortech.2012.01.034
PubMed:
22306075

40. Synthesis of a chitosan-linked calix[4]arene chelating polymer and its sorption ability toward heavy metals and dichromate anions

Author:
Tabakci, Mustafa; Yilmaz, Mustafa
Source:
Bioresource technology 2008 v.99 no.14 pp. 6642-6645
ISSN:
0960-8524
Subject:
anions; cations; chelates; chitosan; heavy metals; pH; polymers; sorption
Abstract:
... This communication describes preparation, characterization, and the evaluation of sorption properties of a calix[4]arene-based chitosan polymer (C[4]BCP). C[4]BCP was used to sorption studies of some heavy metal cations (Co²⁺, Ni²⁺, Cu²⁺, Cd²⁺ , Hg²⁺ and Pb²⁺) and dichromate anions (Cr₂O₇ ²⁻/HCr₂O₇ ⁻) as sorbent material. Also the supporting material (chitosan) was used for comparison in these exp ...
DOI:
10.1016/j.biortech.2007.11.066
PubMed:
18171613

41. Using Fe(III)-coagulant-modified colloidal gas aphrons to remove bio-recalcitrant dissolved organic matter and colorants from cassava distillery wastewater

Author:
Ming Zhang; Li Xie; Zhou Wang; Xiaoli Lu; Qi Zhou
Source:
Bioresource technology 2018 v.268 pp. 346-354
ISSN:
0960-8524
Subject:
anions; cassava; coagulants; color; decolorization; dissolved organic carbon; distillery effluents; dyes; electrostatic interactions; iron; microbubbles; pH
Abstract:
... Efficient removal of bio-recalcitrant dissolved organic matter (DOM) and colorants is essential for discharging or reusing the distillery wastewater. The present work adopted a novel microbubble system – Fe(III)-coagulant-modified colloidal gas aphrons (CGAs) in flotation as tertiary treatment of the bio-chemically treated cassava distillery wastewater. Approximately 93% of bio-recalcitrant color ...
DOI:
10.1016/j.biortech.2018.08.010

42. A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

Author:
T.A.H. Nguyen; H.H. Ngo; W.S. Guo; T.V. Nguyen; J. Zhang; S. Liang; S.S. Chen; N.C. Nguyen
Source:
Bioresource technology 2014 v.169 pp. 291-298
ISSN:
0960-8524
Subject:
adsorption; anions; aqueous solutions; biosorbents; biosorption; byproducts; desorption; hydrochloric acid; iron; phosphates; phosphorus; sodium hydroxide; soymilk; zirconium
Abstract:
... Cationization of agricultural by-products using metal salts is widely used to activate their phosphorous capture ability. This study developed three kinds of new metal loaded soybean milk by-product ‘okara’ for phosphorus biosorption. A comparative study among these biosorbents was carried out with respect to their performances in terms of affinity, stability and reusability. Zirconium loaded okar ...
DOI:
10.1016/j.biortech.2014.06.075

43. The removal of nitrogen and phosphorus from reject water of municipal wastewater treatment plant using ferric and nitrate bioreductions

Author:
Guo, Cheng Hong; Stabnikov, Viktor; Ivanov, Volodymyr
Source:
Bioresource technology 2010 v.101 no.11 pp. 3992-3999
ISSN:
0960-8524
Subject:
activated sludge; public water supply; acetates; electrons; nitrogen; wastewater treatment; cations; anions; phosphates; denitrification; nitrates; phosphorus
Abstract:
... Reject water, which is the liquid fraction produced after dewatering of anaerobically digested activated sludge on the municipal wastewater treatment plants (MWWTPs), contributes up to 80% of the nitrogen and phosphorus loads to the MWWTP. It was proposed to combine the removal of nitrogen from reject water using the sequential biooxidation of [formula removed] and bioreduction of [formula removed ...
DOI:
10.1016/j.biortech.2010.01.039
PubMed:
20138755

44. A study in the adsorption of Fe²⁺ and [formula removed] on pine needles based hydrogels

Author:
Chauhan, Ghanshyam S.; Chauhan, Sandeep; Kumar, Sunil; Kumari, Anita
Source:
Bioresource technology 2008 v.99 no.14 pp. 6464-6470
ISSN:
0960-8524
Subject:
Fourier transform infrared spectroscopy; acrylamides; adsorbents; adsorption; anions; biodegradability; cations; conifer needles; hydrocolloids; hydrolysis; ionic strength; nitrogen; pH; temperature; water uptake
Abstract:
... Novel supports for use as cation and anion adsorbents were prepared from lignocellulosics using pine needles and their carboxymethylated forms by network/hydrogel formation with acrylamide and N,N-methylene bisacrylamide. The hydrogels thus prepared were further functionalized by partial alkaline hydrolysis with 0.5N NaOH and were characterized by FTIR, SEM and nitrogen analysis. Adsorption of Fe² ...
DOI:
10.1016/j.biortech.2007.11.044