Removal of hexavalent chromium using distillery sludge.
Batch mode experiments were conducted to study the removal of hexavalent chromium from aqueous and industrial effluent using distillery sludge. Effects of pH, contact time, initial concentration and adsorbent dosage on the adsorption of Cr(VI) were studied. The data obeyed Langmuir and Freundlich adsorption isotherms. The Langmuir adsorption capacity was found to be 5.7 mg/g. Freundlich constants K(f) and n were 2.05 [mg/g(L/mg)(n)] and 3.9, respectively. Desorption studies indicated the removal of 82% of the hexavalent chromium. The efficiency of adsorbent towards the removal of chromium was also tested using chromium-plating wastewater.
Selvaraj
K
K
Department of Chemistry, PSG College of Arts and Science, Coimbatore 641014, India. kselvaraj_dr@rediffmail.com
Manonmani
S
S
Pattabhi
S
S
D000327:Adsorption; D002274:Carcinogens, Environmental / Q000737:chemistry / Q000302:isolation & purification*; D002857:Chromium / Q000737:chemistry / Q000302:isolation & purification*; D003247:Conservation of Natural Resources; D004595:Electroplating; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D013696:Temperature
D002274:Carcinogens, Environmental; D007220:Industrial Waste; D002857:Chromium; C074702:chromium hexavalent ion