Optimization and equilibrium studies of Pb(II) removal by Grewia Asiatica seed: a factorial design approach

• Authors: Ali Siyal , Saima Memon , Mazhar Khaskheli
• Languages of publication: EN

Abstracts

EN

This study aims to explore the efficiency of an agro waste material for the remediation of Pb(II) contaminated water. A factorial design approach is adopted to optimize removal efficiency and to study the interaction between effective variables. A face-centered Draper-Lin composite design predicted 100% removal efficiency at optimum variables; pH 8, initial concentration of Pb(II) ion 12mg/L, sorbent dose 200mg and agitation time 110 min. Regration coefficient (R2 = 99.9%) of a plot of the predicted versus the observed values and p value (>0.05) confirms the applicability of the predicted model. Langmuir and Dubinin-Radushkevich (D-R) isotherm models were applicable to sorption data with the Langmuir sorption capacity of 21.61±0.78 mg/g. The energy of sorption was found to be 13.62±0.32 kJ/mol expected for ion-exchange or chemisorption nature of sorption process. Characterization of Grewia seed suggested a possible contribution of carboxyl and hydroxyl groups in the process of biosorption. The present study shows that Grewia seeds can be used effectively for the remediation of Pb(II) contaminated water.

Keywords

EN

Optimization; Pb(II) removal; Grewia seed waste; Response Surface Methodology; Factorial design; Equilibrium Studies; Biosorption

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2012
• Volume: 14
• Issue: 1
• Pages: 71-77

Dates

published

1 - 1 - 2012

online

3 - 4 - 2012

Contributors

author

Ali Siyal

• M. A. Kazi Institute of Chemistry University of Sindh, Jamshoro, Pakistan

author

Saima Memon

• Institute of Advance Research Studies in Chemical Sciences, University of Sindh, Jamshoro, Pakistan

author

Mazhar Khaskheli

• Institute of Advance Research Studies in Chemical Sciences, University of Sindh, Jamshoro, Pakistan

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Identifiers

DOI

10.2478/v10026-012-0062-9