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You searched for: Journal Bioresource technology Remove constraint Journal: Bioresource technology Subject anions Remove constraint Subject: anions Subject term cations Remove constraint Subject term: cations
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1. 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

2. 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

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. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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

13. 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