Title: Biosorptive separation of 'labile' fractions of copper and lead from river sediments and evaluation by differential pulse, anodic stripping voltammetry

Authors: Bhim Bali Prasad, Rachana Singh, Dhana Lakshmi

Addresses: Analytical Division, Department of Chemistry, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India. ' Analytical Division, Department of Chemistry, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India. ' Analytical Division, Department of Chemistry, Banaras Hindu University, Varanasi 221005, Uttar Pradesh, India

Abstract: The |labile| copper and lead metal contents of contaminated sediments were extracted in different chemical solutions and then subjected for biosorptive separations. The sorbents called |AlgaSORB-sp| and |AlgaSORB-ch| were derived from two different algae, viz., Spirogyra and Chlorella, respectively . The metal detection was made by differential pulse, anodic stripping voltammetry. The retention of |labile| species onto biosorbents in dynamic mode at optimised conditions of pH 6.9 and flow rate 1.0 mL/min in AlgaSORB-sp (copper ion) and AlgaSORB-ch (lead ion) led metal fractionations into labile and strongly complexed forms, in realistic terms.

Keywords: biosorbtion; AlgaSORB; column chromatography; trace metals; anodic stripping voltammetry; copper; lead; river sediment; metal contamination; contaminated sediments; water pollution; water treatment; algae; Spirogyra; Chlorella.

DOI: 10.1504/IJEP.2006.010461

International Journal of Environment and Pollution, 2006 Vol.27 No.1/2/3, pp.179 - 194

Available online: 24 Jul 2006 *

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