Title: Adsorption of lead and copper using waste foundry sand: statistical evaluation

Authors: Elif Hatice Gürkan; Semra Çoruh; Sermin Elevli

Addresses: Chemical Engineering Department, OndokuzMayis University, Samsun, Turkey ' Environmental Engineering Department, OndokuzMayis University, Samsun, Turkey ' Industrial Engineering Department, OndokuzMayis University, Samsun, Turkey

Abstract: In this study, the adsorption characteristics of lead and copper ions on waste foundry sand were investigated. Multiple regression model with dummy variables was developed to explore and to model the effects of experimental factors which are metal type, adsorbent dosage and initial concentration on adsorption capacity. According to regression model, initial concentration has a quadratic effect on adsorption capacity. The effect of concentration reaches a maximum at 296.47 mg/L and becomes negative afterward. In addition to regression analysis, the adsorption equilibrium data were analysed by using various adsorption isotherm models. Results have shown that adsorption behaviour of two metal ions could be described reasonably well by a generalised isotherm. These results indicate that waste foundry sand could be employed as low-cost material for the removal of both metal ions.

Keywords: waste foundry sand; adsorption; lead; copper; statistical evaluation.

DOI: 10.1504/IJGW.2018.090183

International Journal of Global Warming, 2018 Vol.14 No.2, pp.260 - 273

Available online: 14 Feb 2018 *

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