This study investigated the adsorption kinetics of dissolved copper(II) and zinc(II) by aerobic granular sludge. Two series of batch experiments were conducted at different initial copper(II), zinc(II) concentrations (Co) and initial granule concentrations (Xo). Results showed that the biosorption kinetics of individual copper(II) and zinc(II) by aerobic granules were closely related to Co and Xo. The maximum biosorption capacity of individual copper(II) and zinc(II) by aerobic granules was 246.1 mg g-1 and 180 mg g-1, respectively. In order to theoretically interpret the results obtained, two kinetic models previously developed for biosorption were employed and compared in this study. It was found that the model proposed by Liu et al. (2003) could fit the experimental data very well, but the second-order model failed to fit the data in some cases. It appears that aerobic granules would be potential biosorbent with high efficiency for the removal of dissolved copper(II) and zinc(II) from wastewater.
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Research Article|
November 01 2004
Removal of dissolved copper(II) and zinc(II) by aerobic granular sludge
H. Xu;
H. Xu
1Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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J.-H. Tay;
J.-H. Tay
1Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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S.-K. Foo;
S.-K. Foo
1Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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S.-F. Yang;
S.-F. Yang
1Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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Y. Liu
1Division of Environmental and Water Resources, School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
E-mail: cyliu@ntu.edu.sg
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Water Sci Technol (2004) 50 (9): 155–160.
Citation
H. Xu, J.-H. Tay, S.-K. Foo, S.-F. Yang, Y. Liu; Removal of dissolved copper(II) and zinc(II) by aerobic granular sludge. Water Sci Technol 1 November 2004; 50 (9): 155–160. doi: https://doi.org/10.2166/wst.2004.0559
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