Removal of Cu(II) from aqueous solutions by living and non-living cultured sludges: equilibrium modelling

Poh-Ying Chan, Si-Ling Ng, Chye-Eng Seng and Poh-Eng Lim

International Journal of Environmental Technology and Management, 2012, vol. 15, issue 1, 79-93

Abstract: In this study, the removal of Cu(II) from aqueous solutions using living and non-living cultured sludges of different sludge ages was investigated. For non-living sludge, only the metabolism-independent bio-adsorption process occurred and Langmuir model was adequate to describe the adsorption isotherm. When living sludge was used as the adsorbent, a proposed model incorporating the bio-adsorption and bioaccumulation processes in sequence was found to fit better than the Langmuir model and provided a better interpretation of the metal uptake by living sludge. The bioaccumulation process was observed to be the predominant process in removing Cu(II) from the aqueous solutions.

Keywords: living sludge; non-living sludge; heavy metal removal; bioadsorption; bioaccumulation; equilibrium modelling; heavy metals; aqueous solutions; water pollution; environmental pollution. (search for similar items in EconPapers)
Date: 2012
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