Romoval of Zinc Ion from Aqueous Solution by Adsorption onto Solidifying Landfilled Sludge

Wei Qin Zhu; Zhi Zhang; Jian Li Shan

doi:10.4028/www.scientific.net/AMR.343-344.62

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 343-344Romoval of Zinc Ion from Aqueous Solution by...

Romoval of Zinc Ion from Aqueous Solution by Adsorption onto Solidifying Landfilled Sludge

Abstract:

In this paper, the removal behaviour of Zn²⁺ from aqueous solution by adsorption onto solidifying landfilled sludge and its mechanism were studied. The results showed that Zn²⁺ adsorption capacity reached optimum when initial pH was 3.0. When initial Zn²⁺ concentration was150mg/L, the removal efficiency could reach more than 90% with dosage of solidifying landfilled sludge being 6g/L. Moreover, the adsorption isotherm could conform to Freundlich equations best. The desorption ratio for adsorbed Zn²⁺ reached above 90% by HCl solution with pH value being 1.0, however, it was only about 10% despite of EDTA concentration. FTIR analysis showed that main site for Zn²⁺adsorption onto solidifying landfilled sludge was Me-O group from metal oxide and hydroxyl group from fatty alcohol.

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Advanced Materials Research (Volumes 343-344)

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62-66

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https://doi.org/10.4028/www.scientific.net/AMR.343-344.62

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September 2011

Authors:

Wei Qin Zhu, Zhi Zhang, Jian Li Shan

Keywords:

Adsorption, Desorption, Solidifying Landfilled Sludge, Zinc Ion

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