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Goyal, Varsha
- Cr(VI) Removal from Synthetic Textile Effluent Using Tamarindus indica Bark: A Kinetic and Thermodynamic Study
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Authors
Sudesh
1,
Varsha Goyal
1
Affiliations
1 Department of Chemistry, The IIS University, Jaipur 302 020, IN
1 Department of Chemistry, The IIS University, Jaipur 302 020, IN
Source
Current Science, Vol 110, No 3 (2016), Pagination: 392-398Abstract
Discharge of untreated textile effluents containing heavy metals is a serious environmental issue. Biosorption is a promising method for the removal of heavy metals. The present study analyses the biosorption of Cr(VI) from synthetic textile effluent onto tamarind bark biomass as a function of initial metal ion concentration, contact time, pH, sorbent dosage, shaking speed and temperature. The optimum pH and temperature are found to be 2 and 20°C respectively. The maximum biosorption capacity qe is 21.001 mg/g. Freundlich isotherm model fitted well with correlation coefficient of 0.9. Kinetic study reveals that the biosorption of Cr(VI) follows a pseudosecond-order model. The biosorption of Cr(VI) is spontaneous and exothermic as shown by negative free energy change (ΔG0) and negative enthalpy (ΔH0). Desorption experiments with 2M NaOH, infer the reusability of the biomass up to five times with high efficiency.Keywords
Adsorption Isotherm, Biosorption, Chromium, Kinetic and Thermodynamic Study, Tamarindus indica.Full Text
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