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Title of Journal: Appl Biochem Biotechnol

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Abbravation: Applied Biochemistry and Biotechnology

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Springer-Verlag

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DOI

10.1007/s11623-012-0027-4

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1559-0291

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Biosorption of Heavy Metal Ions CuSuperscript2+

Authors: Yunhai Wu Jianxin Zhou Yajun Wen Li Jiang Yunying Wu
Publish Date: 2012/10/13
Volume: 168, Issue: 8, Pages: 2079-2093
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Abstract

The potential of using two different kinds of air drying of activated sludge aerobic activated sludge and anaerobic activated sludge for the removal of Cu2+ Mn2+ Zn2+ and Fe3+ from aqueous solutions was assessed Results indicated that the maximum biosorption occurred at pH = 50 for Cu2+ Zn2+ and Mn2+ and pH = 30 for Fe3+ The kinetic parameters of biosorption data were found to be best fitted to the secondorder equation Also it was found that the best dosage for biosorption was 02 g for both aerobic activated sludge and anaerobic activated sludge The experimental results were fitted well to the Langmuir Freundlich and Dubinin–Radushkevich DR isotherms The maximum biosorption capacities of Cu2+ Mn2+ Zn2+ and Fe3+ for aerobic activated sludge were 65789 44843 64935 and 75756 mg/g respectively while they were 59880 49020 62500 and 69444 mg/g for anaerobic activated sludge respectively The mean free energy values evaluated from the DR model indicated that the biosorptions of studied heavy metal ions onto activated sludge were taken place by chemical interaction The results of this study provided valuable information on the biosorption of heavy metals by activated sludge that may contribute in wastewater treatment

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