Document Type : Original Articles
Assistant Professor, Department of Environmental Science, Faculty of Natural Resources, University of Birjand, Birjand
MSc. Student of Environmental Pollution, Faculty of Natural Resources, University of Birjand, Birjand
PhD.Student of Analytical Chemistry, Faculty of Chemistry, University of Birjand, Birjand
It is now well recognized that heavy metals in the environment cause pollution that can be harmful to living organisms. Without control, heavy metals that are transferred to the environment may undergo significant changes and have a serious impact on aquatic environments, public health and economics. In view of the serious detrimental effect to the environment and health of wastewater containing Cr (VI), there is an urgent need for regulation. The objective of the present study was to investigate Cr (VI) removal from aqueous solutions using barberry leaves. The effects of parameters such as acidity, contact time, sorbent dose and initial concentration were evaluated for batch mode. Results showed maximum adsorption in an acidic medium at pH level 2; initial Cr(VI) concentration of 80 mg L−1 and temperature of 25◦C with a contact time of 10 min at 200 rpm stirring speed. Test results were analysed by adsorption isotherms and kinetics modelling and the best adaptation was made by the Langmuir isotherm and the second best by the para-stage synthetic model.
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