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Removal and Recovery of Chromium(VI) from Industrial Waste Water
Author(s) -
Singh Vinay K.,
Tiwari Prem N.
Publication year - 1997
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/(sici)1097-4660(199707)69:3<376::aid-jctb714>3.0.co;2-f
Subject(s) - chromium , adsorption , slurry , chemistry , aqueous solution , ammonia , endothermic process , waste management , langmuir adsorption model , activated carbon , naphtha , pulp and paper industry , environmental engineering , environmental science , organic chemistry , catalysis , engineering
Carbon slurry, generated as a waste material in a naphtha‐based ammonia plant of the Fertilizer Corporation of India, Gorakhpur, has been used as an adsorbent for the removal of Cr(VI) from aqueous solution at different experimental conditions. The removal was favoured at low pH, with maximum removal at pH 2·5. The effects of concentration and temperature have also been reported. Batch adsorption kinetics have been described by the Lagergren equation. The applicability of the Langmuir isotherm for the present system has been tested at different temperatures. Thermodynamic parameters indicate the endothermic nature of Cr(VI) adsorption on carbon slurry. Recovery of adsorbed chromium for reuse has also been reported in the present study. © 1997 SCI.