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Vol. 26 No. 14 (2014): Vol 26 Issue 14

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Modeling of Heavy Metals Adsorption by Inorganic Particles and Activated Sludge in Domestic Wastewater Treatment Plant

https://doi.org/10.14233/ajchem.2014.17032
Dejun Kang
School of Municipal Engineering, Department of Civil Engineering, Fuzhou University, No 2, Xueyuan Road, University Town, Fuzhou 350108, Fujian, P.R. China
Danyu Xie
School of Municipal Engineering, Department of Civil Engineering, Fuzhou University, No 2, Xueyuan Road, University Town, Fuzhou 350108, Fujian, P.R. China
Pengzhen Ke
Hubei Environmental Monitoring Station, Wuhan 430070, P.R. China

Corresponding Author(s) : Pengzhen Ke

djkang@fzu.edu.cn; arc_arc@163.com

Asian Journal of Chemistry, Vol. 26 No. 14 (2014): Vol 26 Issue 14

Abstract

In order to verify whether a conventional wastewater treatment process can provide sufficient protective screen of heavy metals, a long-term regular monitoring of different stages of a wastewater treatment plant was conducted. Through a series of adsorption experiments using quartz sand, kaolin of known size distribution as inorganic adsorbents and laboratory-cultured activated sludge as organic adsorbent for adsorbing model of the Cu and Zn, it was found that the adsorption of heavy metals by the inorganic adsorbents well followed by the Langmuir isotherm with the saturation capacity proportional to the specific surface area of the solid particles, indicating a single-layer adsorption property. However for the activated sludge, its adsorption isotherm showed a property of multilayer adsorption and the adsorption capacity was one order higher than the inorganic particles. Models obtained from the adsorption experiment were practical and can provide an approach to predicting the contents of heavy metals in the wastewater treatment plant's effluent.

Keywords

Activated sludge Adsorption isotherm Heavy metal Inorganic particles
Kang, D., Xie, D., & Ke, P. (2014). Modeling of Heavy Metals Adsorption by Inorganic Particles and Activated Sludge in Domestic Wastewater Treatment Plant. Asian Journal of Chemistry, 26(14), 4475–4480. https://doi.org/10.14233/ajchem.2014.17032
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