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Effects of pH and temperature on isotherm parameters of chlorophenols biosorption to anaerobic granular sludge

As the most important parameters affecting the biosorption, pH and temperature were studied in this paper in order to more completely understand their effects on chlorophenols’ biosorption onto anaerobic granular sludge. Sorption isotherms of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) at...

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Published in:Journal of hazardous materials 2007-07, Vol.145 (3), p.398-403
Main Authors: Gao, Ruiying, Wang, Jianlong
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description As the most important parameters affecting the biosorption, pH and temperature were studied in this paper in order to more completely understand their effects on chlorophenols’ biosorption onto anaerobic granular sludge. Sorption isotherms of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) at various temperatures were determined; the data of 4-CP could be simulated by Langmuir model, while the data of 2,4-DCP could only be reproduced by Freudlich equation. The uptake capacity of 4-CP and 2,4-DCP could reach 1.5 mg g −1 and 5.04 mg g −1 when 2,4-DCP concentration was 90 mg L −1 and 4-CP concentration was 107 mg L −1, respectively. 2,4-DCP was more strongly adsorbed onto the anaerobic granular sludge than 4-CP, which might be correlated with the numbers of chlorine substitute. The Experiments studying pH effects showed that the adsorption capacity of 4-CP and 2,4-DCP was quite pH dependent and increased with decrease in pH.
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subjects Adsorption
Anaerobic granular sludge
Anaerobiosis
Applied sciences
Bacteria, Anaerobic - physiology
Biological and medical sciences
Biosorption
Biotechnology
Chemical engineering
Chlorophenol
Chlorophenols - chemistry
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Hydrogen-Ion Concentration
Industrial Waste
Methods. Procedures. Technologies
Others
Pollution
Temperature
Various methods and equipments
Waste Management - methods
Water Pollutants, Chemical - chemistry
title Effects of pH and temperature on isotherm parameters of chlorophenols biosorption to anaerobic granular sludge
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