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You searched for: Journal Journal of chemical technology and biotechnology Remove constraint Journal: Journal of chemical technology and biotechnology Publication Year 2019 Remove constraint Publication Year: 2019 Subject adsorption Remove constraint Subject: adsorption Subject adsorbents Remove constraint Subject: adsorbents
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1. A novel silica xerogel synthesized from volcanic tuff as an adsorbent for high‐efficient removal of methylene blue: parameter optimization using Taguchi experimental design

Author:
Guzel Kaya, Gülcihan; Yilmaz, Elif; Deveci, Huseyin
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.8 pp. 2729-2737
ISSN:
0268-2575
Subject:
Taguchi method; adsorbents; adsorption; ambient pressure; aqueous solutions; desorption; drying; experimental design; hydrochloric acid; methylene blue; pH; porous media; silica; sorption isotherms; temperature; texture; tuff; xerogels
Abstract:
... BACKGROUND: In this study, silica xerogel was synthesized using volcanic tuff instead of expensive silica precursors at ambient pressure drying. The mesoporous silica xerogel with unique structural and textural properties was evaluated as an adsorbent for methylene blue (MB) removal from aqueous solution. Taguchi method was applied to optimize controllable factors (contact time, initial MB concent ...
DOI:
10.1002/jctb.6089

2. Facile synthesis of MnOx‐loaded biochar for the removal of doxycycline hydrochloride: effects of ambient conditions and co‐existing heavy metals

Author:
Liu, Si‐jia; Liu, Yun‐guo; Tan, Xiao‐fei; Liu, Shao‐bo; Li, Mei‐fang; Liu, Ni; Yin, Zhi‐hong; Tian, Si‐rong; Zhou, Ya‐hui
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.7 pp. 2187-2197
ISSN:
0268-2575
Subject:
adsorbents; adsorption; biochar; biomass; chromium; copper; cost effectiveness; doxycycline; electrostatic interactions; heavy metals; ionic strength; manganese monoxide; metal ions; moieties; nanoparticles; pH; pretreatment; pyrolysis
Abstract:
... BACKGROUND: In this study, manganese oxide (MnOₓ) nanoparticle loaded biochar (BC) was applied for doxycycline hydrochloride (DOX) removal from water. Biochar composites were synthesized by either pre‐treating biomass using MnCl₂/KMnO₄/NaOH (PMBC) or inserting MnOₓ ultrafine particles after pyrolysis of biomass (AMBC). In complex water environments, the presence of heavy metals may affect the remo ...
DOI:
10.1002/jctb.6000

3. Volcanic rock‐based ceramsite adsorbent for highly selective fluoride removal: function optimization and mechanism

Author:
Chao, Chunfang; Zhao, Yingxin; Song, Qian; Min, Ji; Wang, Zijian; Ma, Huilin; Li, Xin
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.7 pp. 2263-2273
ISSN:
0268-2575
Subject:
adsorbents; adsorption; adverse effects; aluminum sulfate; anions; aquatic environment; bentonite; bicarbonates; carbonates; chlorides; corn starch; electrostatic interactions; fluorides; kinetics; ligands; models; nitrates; pH; porosity; porous media; sorption isotherms; strength (mechanics); volcanic rocks
Abstract:
... BACKGROUND: While various granular adsorbents have been studied for fluoride removal from water, this study focuses on the optimization of mixture proportions of volcanic rock, bentonite, corn starch and aluminum sulfate using a four‐component simplex‐centroid mixture design (SCMD) method to achieve preferable fluoride removal ratio and ceramsite mechanical strength. To illustrate the adsorption m ...
DOI:
10.1002/jctb.6014

4. Hierarchical Fe3O4‐derived organic/inorganic hybrids constructed by modified bio‐inspired functionalization: efficient adsorbents for water‐soluble methylene blue and mechanism

Author:
Zhan, Yingqing; Zhao, Shumei; Wan, Xinyi; He, Shuangjiang
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.5 pp. 1638-1650
ISSN:
0268-2575
Subject:
adsorbents; adsorption; coprecipitation; dopamine; energy; iron oxides; magnetic materials; magnetism; methylene blue; microstructure; models; nanoparticles; recycling; sorption isotherms; surface area; water solubility
Abstract:
... BACKGROUND: The development of efficient and sustainable adsorbents is still a challenge for dye removal in practical applications. Here a method to prepare hierarchical Fe₃O₄‐derived organic/inorganic hybrid adsorbents for methylene blue removal is demonstrated. Typically, two different structured magnetic nanoparticles were synthesized through solvothermal route and chemical co‐precipitation (na ...
DOI:
10.1002/jctb.5933

5. Optimization and activation of renewable durian husk for biosorption of lead (II) from an aqueous medium

Author:
Ngabura, Mohammed; Hussain, Siti Aslina; Ghani, Wan Azlina WAK; Jami, Mohammed S; Tan, Yen P
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.5 pp. 1384-1396
ISSN:
0268-2575
Subject:
adsorbents; adsorption; biosorbents; biosorption; carbon; durians; hemicellulose; hulls; kinetics; lead; moieties; pH; response surface methodology; sorption isotherms; temperature; water pollution
Abstract:
... BACKGROUND: Biosorption of lead Pb(II) by durian husk activated carbon (DHAC) was investigated. The main aim of this work is to explore the effect of operating variables such as pH, biosorbent dose, temperature, initial metal ion concentration and contact time on the removal of Pb(II) from synthesized aqueous medium using a response surface methodology (RSM) technique. The experimentation was perf ...
DOI:
10.1002/jctb.5882

6. Removal of gaseous methyl tert‐butyl ether using bagasse activated carbon pretreated with chemical agents

Author:
Pongkua, Waleeporn; Dolphen, Rujira; Thiravetyan, Paitip
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.5 pp. 1551-1558
ISSN:
0268-2575
Subject:
adsorbents; adsorption; bagasse; carbon; combustion; gasoline; human health; moieties; nitric acid; potassium hydroxide; sulfuric acid; surface area
Abstract:
... BACKGROUND: Methyl tert‐butyl ether (MTBE), an anti‐knocking reagent emitted from incomplete gasoline combustion can affect human health. Bagasse activated carbon (AC) was modified by H₂SO₄, KOH, CaCl₂/HCl and HNO₃ to increase surface area and surface functional groups which led to enhance MTBE adsorption. RESULTS: The results showed maximum adsorption capacity (Qₘₐₓ) of MTBE by bagasse AC modifie ...
DOI:
10.1002/jctb.5918

7. Efficient and selective adsorption of small polyols by boronic acid functionalized polystyrene adsorbent

Author:
Jia, Yu‐Xiang; Sun, Weizhi; Yin, Chai; Xu, Chao; Yu, Shitao; Mo, Xian
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1259-1268
ISSN:
0268-2575
Subject:
adsorbents; adsorption; alkalinity; aqueous solutions; boiling point; culture media; fermentation; glycerol; hydrophilicity; moieties; pH; phenylboronic acids; polystyrenes; resins
Abstract:
... BACKGROUND: The separation of polyols from fermentation broth remains a challenge due to their high boiling points and strong hydrophilicity, however, they show pH‐dependent reversible interaction with boronic acid, which makes it a perfect moiety for the construction of functional adsorbents for polyols enrichment. RESULTS: Boronic acid functionalized polystyrene adsorbents were successfully synt ...
DOI:
10.1002/jctb.5879

8. Mechanism of adsorption of tetracycline–Cu multi‐pollutants by graphene oxide (GO) and reduced graphene oxide (rGO)

Author:
Zhao, Chuanqi; Hong, Peidong; Li, Yajuan; Song, Xiaoming; Wang, Yinggang; Yang, Yuesuo
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.4 pp. 1176-1186
ISSN:
0268-2575
Subject:
X-ray photoelectron spectroscopy; adsorbents; adsorption; copper; electrostatic interactions; graphene oxide; heavy metals; livestock; moieties; pollutants; poultry industry; tetracycline
Abstract:
... BACKGROUND: The adsorption of single pollutants onto graphene oxide (GO), such as heavy metals or organics, has been widely investigated, however, the simultaneous removal of the antibiotic–heavy metal multi‐pollutants from the intensive livestock and poultry industry has been investigated little. In this study, the GO/reduced GO(rGO) were prepared as adsorbent and the adsorption performance of te ...
DOI:
10.1002/jctb.5864

9. Evaporation‐induced self‐assembly (EISA) synthesized mesoporous bimetallic oxides (MBOs) enabling enhanced co‐uptake of arsenate and fluoride from water

Author:
Li, Feihu; Fu, Jingjing; Jin, Jie; Wang, Silan; Liu, Yangyang; Yang, Meng; Fu, Xiaoru
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.3 pp. 879-891
ISSN:
0268-2575
Subject:
X-ray photoelectron spectroscopy; adsorbents; adsorption; anions; arsenates; arsenic; fluorides; models; oxides; porous media; remediation; wastewater
Abstract:
... BACKGROUND: Simultaneous removal of arsenic and fluoride anions from water by adsorption remains a challenge for environmental remediation practice. To address this issue, four mesoporous bimetallic oxides (MBOs) were prepared via the evaporation‐induced self‐assembly (EISA) method and studied as adsorbents for the co‐uptake of arsenate (As(V)) and fluoride (F⁻) from synthetic wastewater. Adsorpti ...
DOI:
10.1002/jctb.5835

10. Amino‐functionalized material from a bio‐template for silver adsorption: process evaluation in batch and fixed bed

Author:
Romero‐Cano, Luis A; García‐Rosero, Helena; del Olmo‐Iruela, Monsalud; Carrasco‐Marín, Francisco; González‐Gutiérrez, Linda V
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.2 pp. 590-599
ISSN:
0268-2575
Subject:
adsorbents; adsorption; aqueous solutions; citrus peels; grapefruits; melamine; models; nitrogen content; silver; urea
Abstract:
... BACKGROUND: The modification of an organic matrix as a bio‐template (grapefruit peel) using urea and melamine was carried out to introduce amino groups on its surface and favor Ag(I) adsorption in aqueous solution for metal recovery. RESULTS: Adsorption capacity in batch mode was proportional to the nitrogen content within the adsorbents, the maximum being the one obtained with the adsorbent funct ...
DOI:
10.1002/jctb.5806

11. Selective adsorption of uranium from salt lake‐simulated solution by phenolic‐functionalized hollow sponge‐like adsorbent

Author:
He, Yu; Lin, Xiaoyan; Yan, Tingsong; Zhang, Xiaonuo; Zhou, Jian; Chen, Yan; Luo, Xuegang
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.2 pp. 455-467
ISSN:
0268-2575
Subject:
absorbents; adsorbents; adsorption; biomass; carbon; endothermy; heavy metals; hydrothermal carbonization; leather; metal ions; models; moieties; salt lakes; sorption isotherms; thermodynamics; uranium; wastes
Abstract:
... BACKGROUND: Hydrothermal carbonization has become a proficient technique to synthesize carbon materials from biomass owing to its availability and environmental friendliness. Chrome‐tanned leather, a biomass waste that contains numerous functional groups, is a potential adsorbent for separation of heavy metal ions. In the present work, a phenolic‐functionalized hollow sponge‐like adsorbent (HSLW) ...
DOI:
10.1002/jctb.5790

12. A newly synthesized N,O group modified hypercrosslinked resin with effective uptake towards polyphenols from aqueous media: behavior and mechanism

Author:
Xu, Chao; Sun, Weizhi; Qin, Xiaoli; Wang, Chuanhong; Yu, Shitao; Xian, Mo; Liu, Huizhou
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.1 pp. 276-287
ISSN:
0268-2575
Subject:
adsorbents; adsorption; chemical reactions; density functional theory; equations; physical properties; polyphenols; resins; sorption isotherms; surface area; wastewater
Abstract:
... BACKGROUND: A series of hypercrosslinked resins were synthesized by controlling the reaction conditions of the Friedel–Crafts reaction of chloromethylated polystyrene‐co‐divinylbenzene (St‐DVB‐Cl), which realized reasonable adjustment of pore structure, surface area and other physical properties. Based on this, a new N,O modified hypercrosslinked resin (St‐DVB‐NB‐AC₂O) was successfully prepared by ...
DOI:
10.1002/jctb.5773

13. Efficient adsorption of oil in water by hydrophobic nonwoven fabrics coated with cross‐linked polydivinylbenzene fibers

Author:
Zhu, Xiaobiao; Wang, Xiaohui; Liu, Yapeng; Tian, Ye; Li, Yuan
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.1 pp. 128-135
ISSN:
0268-2575
Subject:
adsorbents; adsorption; cations; crosslinking; endothermy; ethanol; hexane; human health; hydrophobicity; macropores; micropores; models; nanofibers; nonwoven fabrics; oils; polymerization; temperature; thermodynamics; wastewater; water pollution
Abstract:
... BACKGROUND: Oil pollution of water causes extensive damage to the environment and human health. Adsorption techniques are environmentally friendly and relatively feasible to treat oil contamination and reclaim oil resources, and it is essential to develop adsorbents that have high adsorption capacity for oil which can be recycled and regenerated conveniently to save money and resources. RESULTS: H ...
DOI:
10.1002/jctb.5753

14. Synthesis and surface gel‐adsorption effect of multidimensional cross‐linking cationic cotton for enhancing purification of dyeing wastewater

Author:
Song, Chunli; Yu, Yikai; Sang, Xiaoyan
Source:
Journal of chemical technology and biotechnology 2019 v.94 no.1 pp. 120-127
ISSN:
0268-2575
Subject:
activated carbon; adsorbents; adsorption; aquatic environment; copolymerization; cotton; crosslinking; dyes; filters; pollution; quaternary ammonium compounds; wastewater; water purification
Abstract:
... BACKGROUND: Dyeing wastewater has caused serious pollution of aquatic environments, and adsorption is one of the most commonly used water‐purification methods with selection of suitable adsorbents being the key factor. These factors motivated us to develop new, more efficient adsorbents to purify dyeing wastewater. RESULTS: A surface cross‐linking co‐polymerization of triallylmethylammonium chlori ...
DOI:
10.1002/jctb.5752