Title: Study of equilibrium and kinetic models for removal of chromium (VI) and lead (II) by modified feather by H2O2

Authors: Hasti Daraei; Ahmad Reza Yazdanbakhsh; Mohammad Manshouri; Mohammad Noorisepehr

Addresses: Department of Environmental Health Engineering, Alborz University of Medical Sciences, Golshahr Street, 3198764653, Karaj, Iran ' College of Public Health, Shaheed Beheshti University of Medical Sciences, Shahid Chamran High Way, Evin District Daneshjoo Square, Tehran, Iran ' College of Public Health, Shaheed Beheshti University of Medical Sciences, Shahid Chamran High Way, Evin District Daneshjoo Square, Tehran, Iran ' Department of Environmental Health Engineering, Alborz University of Medical Sciences, Golshahr Street, 3198764653, Karaj, Iran

Abstract: Heavy metals are sorely toxic for the environment and human. In this study, the ability of feather for sorption chromium and lead from aqueous solution was investigated. All the experiments were carried out in a batch system. For this aim, the effect of various parameters such as pH, temperature, contact time, dosage sorbent and initial concentration were investigated. Results showed that maximum Cr (VI) and Pb adsorption were observed at pH 2 and pH 5, respectively. Also, the equilibrium time for Cr and Pb removal was archived 6 h and 8 h, respectively. Results also indicated that the adsorption efficiency decreased with increase in metals concentration. Experimental data were fitted with Freundlich and Langmuir isotherm models and also, experimental data was best fitted onto pseudo-second order model. The results indicate that ostrich feathers can be utilised as an economic and effective sorbent for Cr (VI) and Pb removal in water and industrial effluent.

Keywords: adsorption; chromium removal; lead removal; ostrich feathers; kinetic modelling; equilibrium modelling; isotherm models; environmental pollution; waste; heavy metals; hydrogen peroxide; water pollution; sorbents; industrial effluent.

DOI: 10.1504/IJEWM.2013.056690

International Journal of Environment and Waste Management, 2013 Vol.12 No.4, pp.453 - 465

Received: 12 May 2012
Accepted: 04 Aug 2012

Published online: 20 Sep 2014 *

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