Chromate adsorption from chromite ore processing residue eluates by three Indian soils

摘要: Environmental context Chromate (CrO42–)-containing waste is illegally dumped in some places the state of Uttar Pradesh, north India, although CrO42– known to be toxic and carcinogenic. Because leached from landfills, this study investigated adsorption by soils. The results indicated that highly leachable inhibited, which leads contamination groundwater drinking water area. Abstract Chromite ore processing residue (COPR) a harmful chromate (CrO42–) extraction roasting process. Nevertheless, deposition COPR uncontrolled surface landfills still common practice countries. Leaching carcinogenic key environmental risk arising sites. objective was evaluate behaviour eluates Prior experiments, batch studies at varying solid-to-liquid ratios were performed solubility COPR. experiments carried out system with obtained two different Indian COPRs assess potential CrO42–. Three soils originate surroundings dumping sites chosen order provide realistic conditions. data evaluated Freundlich Langmuir equation. inhibited because high pH both (pH 6.7 7.2) 12.3) as well carbonate concentration eluates. extent similar. main difference between thus initial concentration. presented an improved understanding mobility affected area, important local population uses not only for needs livestock but also water.