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Treatment of cadmium‐plating and chromium‐plating wastes by iron oxide‐coated sand
Iron oxide‐coated sand, prepared by evaporating (110° ± 10°C) ferric nitrate solution in the presence of sand, was found unsuitable for removal of chromium from a mixed oxidation‐state chromium‐plating waste (chromium 2.55 to 2.70 mg Cr/L) in a preliminary column test; however, it appeared promising for one‐step removal of cadmium and cyanide from a cadmium‐plating waste (cadmium 3.60 to 3.75 mg Cd/L; and cyanide 0.85 to 1.06 mg CN−/L). A detailed column test with regeneration by 0.01 M NaNO3 solution at pH 3.0 further indicated suitability of the iron oxide‐coated sand for treatment of cadmium‐plating waste. Making the most of column operation in terms of hydraulic loading rate and medium depth and standardization of regeneration procedure are necessary.
Treatment of cadmium‐plating and chromium‐plating wastes by iron oxide‐coated sand
Iron oxide‐coated sand, prepared by evaporating (110° ± 10°C) ferric nitrate solution in the presence of sand, was found unsuitable for removal of chromium from a mixed oxidation‐state chromium‐plating waste (chromium 2.55 to 2.70 mg Cr/L) in a preliminary column test; however, it appeared promising for one‐step removal of cadmium and cyanide from a cadmium‐plating waste (cadmium 3.60 to 3.75 mg Cd/L; and cyanide 0.85 to 1.06 mg CN−/L). A detailed column test with regeneration by 0.01 M NaNO3 solution at pH 3.0 further indicated suitability of the iron oxide‐coated sand for treatment of cadmium‐plating waste. Making the most of column operation in terms of hydraulic loading rate and medium depth and standardization of regeneration procedure are necessary.
Treatment of cadmium‐plating and chromium‐plating wastes by iron oxide‐coated sand
Satpathy, Jiban K. (author) / Chaudhuri, Malay (author)
Water Environment Research ; 67 ; 788-790
1995-07-01
3 pages
Article (Journal)
Electronic Resource
English
TREATMENT , CHROMIUM , CADMIUM , METAL‐PLATING WASTE , IRON OXIDE , CYANIDE
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