Adsorption of anionic dyes on to waste Fe (III)/Cr (III).
Waste Fe (III)/Cr (III) hydroxide was investigated for the removal of anionic dyes, namely acid brilliant blue (acidic dye) and procion red (reactive azo dye) from aqueous solution. In batch experiments, parameters studied include contact time, adsorbate concentration, pH, adsorbent dose and temperature. Adsorption followed Langmuir isotherm with adsorption capacity of 10.37 and 3.28 mg/g for acid brilliant blue and procion red, respectively. Adsorption kinetic studies showed second order with respect to acid brilliant blue and first order with respect to procion red. Thermodynamic parameters such as free energy, enthalpy and entropy of adsorption were also evaluated.
Namasivayam
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Environmental Chemistry Division, Department of Environmental Sciences, Bharathiar University, Coimbatore - 641 046, INDIA. cnamasi@yahoo.com
Sumithra
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D000327:Adsorption; D017608:Chromium Compounds / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007700:Kinetics; D013696:Temperature; D014227:Triazines / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D017608:Chromium Compounds; D004396:Coloring Agents; D005290:Ferric Compounds; D007220:Industrial Waste; D014227:Triazines; D014874:Water Pollutants, Chemical; C003213:Procion Brilliant Red M-2BS; C021024:ferric hydroxide