Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria
Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria
Hong’en QUAN1, He BAI1, Yang HAN1, Yong KANG1(), Jiao SUN1,2
1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; 2. School of Chemical Engineering, Hebei University of Technology, Tianjin 300401, China
The biosorption properties of dead sulfate reducing bacteria (SRB) for the removal of Cu(II) and Fe(III) from aqueous solutions was studied. The effects of the biosorbent concentration, the initial pH value and the temperature on the biosorption of Cu(II) and Fe(III) by the SRB were investigated. FTIR analysis verified that the hydroxyl, carbonyl and amine functional groups of the SRB biosorbent were involved in the biosorption process. For both Cu(II) and Fe(III), an increase in the SRB biosorbent concentration resulted in an increase in the removal percentage but a decrease in the amount of specific metal biosorption. The maximum specific metal biosorption was 93.25 mg?g–1 at pH 4.5 for Cu(II) and 88.29 mg?g–1 at pH 3.5 for Fe(III). The temperature did not have a significant effect on biosorption. In a binary metal system, the specific biosorption capacity for the target metal decreased when another metal ion was added. For both the single metal and binary metal systems, the biosorption of Cu(II) and Fe(III) onto a SRB biosorbent was better represented by a Langmuir model than by a Freundlich model.
Corresponding Author(s):
KANG Yong,Email:ykang@tju.edu.cn
引用本文:
. Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria[J]. Frontiers of Chemical Science and Engineering, 2013, 7(2): 177-184.
Hong’en QUAN, He BAI, Yang HAN, Yong KANG, Jiao SUN. Removal of Cu(II) and Fe(III) from aqueous solutions by dead sulfate reducing bacteria. Front Chem Sci Eng, 2013, 7(2): 177-184.
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