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Siyal, A. , Memon, S. , Elçi, L. , Elçi, A.. "Extraction of Polystyrene from Styrofoam Waste: Synthesis of Novel Chelating Resin for the Enrichment and Speciation of Cr(III)/Cr(VI) Ions in Industrial Effluents". World Academy of Science, Engineering and Technology, Open Science Index 87, International Journal of Environmental and Ecological Engineering, (2014), 8(3), 212 - 215.