Adsorption of Methyl Parathion from Aqueous Solutions Using Mango Kernels: Equilibrium, Kinetic and Thermodynamic Studies

Authors: Memon, G. Zuhra; Bhanger, M. I.; Memon, Jamil; Akhtar, Mubeena

Source: Bioremediation Journal, Volume 13, Number 2, April 2009 , pp. 102-106(5)

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Abstract:

The adsorption of methyl parathion from aqueous solutions by the low-cost and abundant adsorbent mango kernel was studied in a batch adsorption system. The adsorption was studied as a function of pH, contact time, initial pesticide concentration, adsorbent dose, and temperature. A maximum adsorption of 98% ± 1% was achieved. Physicochemical characterization of the adsorbent was carried out by EDXRF, BET, and CHNS analysis. Freundlich, Langmuir, and Dubinin-Radushkevich isotherms were employed to evaluate the adsorption capacity of the adsorbent. Lagergren, Morris-Weber, and Reichenberg equations were employed to study the kinetics of the adsorption process. Thermodynamic parameters Δ H, Δ S, and Δ G were computed. The developed adsorption method was applied to real environmental samples.

Keywords: adsorption; isotherms; kinetics; mango kernel; methyl parathion; thermodynamics

Document Type: Research article

DOI: http://dx.doi.org/10.1080/10889860902902081

Affiliations: 1: National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan

Publication date: 2009-04-01