Removal of hexavalent chromium from aqueous solutions by adsorption on coal char.
The ability of Coal char, a waste product obtained after the reduction of iron ore, to remove hexavalent chromium from aqueous solutions by adsorption has been studied. The effects of pH, temperature, concentration of hexavalent chromium and coal char were investigated. Under ambient temperature and pH condition removal efficiency to the extent of more than 70 per cent has been achieved. The rate process follows first order kinetics with respect to hexavalent chromium concentrations. Thermodynamic parameters and adsorption results have been studied. Recycling efficiency of the coal char was also determined.
D002274:Carcinogens, Environmental / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007194:India; D012996:Solutions; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water; D014874:Water Pollutants, Chemical
D002274:Carcinogens, Environmental; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D002857:Chromium; D002606:Charcoal; C074702:chromium hexavalent ion