Removal of chromium (VI) as chromium diphenyl carbazide (CDC) complex from aqueous solution by activated carbon

The removal of hexavalent chromium from aqueous solutions by the formation of chromium diphenyl carbazide (CDC) complex followed by adsorption on activated carbon was studied. Factors affecting the adsorption of the CDC complex included the solution pH and the presence of chromium(III). Removal was...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 1992-11, Vol.65 (3-4), p.329-337
Main Authors: GAJGHATE, D. G, SAXENA, E. R, AGGARWAL, A. L
Format: Article
Language:English
Subjects:
Applied sciences
Biological and physicochemical phenomena
Exact sciences and technology
Natural water pollution
Pollution
Water treatment and pollution
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Summary:The removal of hexavalent chromium from aqueous solutions by the formation of chromium diphenyl carbazide (CDC) complex followed by adsorption on activated carbon was studied. Factors affecting the adsorption of the CDC complex included the solution pH and the presence of chromium(III). Removal was not enhanced by increasing the particle size and surface area of the activated carbon. Optimal quantities of diphenyl carbazide for use with different concentrations of chromium(VI) were determined. The presence of reduced chromium decreased the rate of removal of the CDC complex. Langmuir and Freundlich isotherm constants were calculated for the removal process.
ISSN:0049-6979
1573-2932
DOI:10.1007/BF00479896