A comparative study for the biosorption characteristics of chromium(VI) on ca-alginate, agarose and immobilized c vulgaris in a continuous packed bed column

A comparative biosorption of chromium(VI) ions to Ca-alginate and agarose biopolymers and immobilized C. vulgaris, a green alga was investigated. The experiments were carried out in a packed bed column operated in a continuous mode, as a function of the flow rate and inlet chromium(VI) ion concentra...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 1999-03, Vol.34 (2), p.295-316
Main Authors: Aksu, Z., Egretli, G., Kutsal, T.
Format: Article
Language:English
Subjects:
agarose
biosorption
Ca-alginate
Chromium(VI)
immobilized C. vulgaris
packed bed column
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Summary:A comparative biosorption of chromium(VI) ions to Ca-alginate and agarose biopolymers and immobilized C. vulgaris, a green alga was investigated. The experiments were carried out in a packed bed column operated in a continuous mode, as a function of the flow rate and inlet chromium(VI) ion concentration. The removal percentage of chromium(VI) ions related to the effluent volumes were also determined. A garose and agarose - algae systems showed a rapid chromium(VI) uptake initially while chromium (VI) ion adsorption to Ca-alginate and Ca-alginate-algae systems was limited initially by the diffusion of the solute through the pores. Ca-alginate was not a good biosorbent for chromium(VI) ions and immobilization of C. vulgaris to Ca-alginate only marginally increased the biosorption yield. However, agarose and agarose immobilized C. vulgaris increased the biosorption capacity. Total chromium(VI) removal by agarose and agarose-C vulgaris systems were higher than that of Ca-alginate and Ca-alginate immobilized C. vulgaris at the same time interval.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529909376837