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Removal of Cr(VI) from wastewater using rice bran.
J Colloid Interface Sci. 2005 Oct 01; 290(1):61-8.JC

Abstract

The novel biosorbent rice bran has been successfully utilized for the removal of Cr(VI) from wastewater. The maximum removal of Cr(VI) was found to be 99.4% at pH 2.0, initial Cr(VI) concentration of 200 mg l(-1), and temperature 20 degrees C. The effect of different parameters such as contact time, adsorbate concentration, pH of the medium, and temperature was investigated. The adsorption kinetics was tested for first-order reversible, pseudo-first-order, and pseudo-second-order; reaction and the rate constants of kinetic models were calculated. Mass transfer of Cr(VI) from the bulk to the solid phase (rice bran) was studied at different temperatures. Different thermodynamic parameters, viz., changes in standard free energy, enthalpy, and entropy, have also been evaluated and it has been found that the reaction was spontaneous and endothermic in nature. The Langmuir and Freundlich equations for describing adsorption equilibrium were applied to data. The constants and correlation coefficients of these isotherm models were calculated and compared. Desorption studies was also carried out and found that complete desorption of Cr(VI) took place at pH of 9.5. The data were also subjected to multiple regression analysis and a model was developed to predict the removal of Cr(VI) from wastewater.

Authors+Show Affiliations

Water Pollution Research Laboratory, Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India. kks_envir@yahoo.co.inNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16122543

Citation

Singh, K K., et al. "Removal of Cr(VI) From Wastewater Using Rice Bran." Journal of Colloid and Interface Science, vol. 290, no. 1, 2005, pp. 61-8.
Singh KK, Rastogi R, Hasan SH. Removal of Cr(VI) from wastewater using rice bran. J Colloid Interface Sci. 2005;290(1):61-8.
Singh, K. K., Rastogi, R., & Hasan, S. H. (2005). Removal of Cr(VI) from wastewater using rice bran. Journal of Colloid and Interface Science, 290(1), 61-8.
Singh KK, Rastogi R, Hasan SH. Removal of Cr(VI) From Wastewater Using Rice Bran. J Colloid Interface Sci. 2005 Oct 1;290(1):61-8. PubMed PMID: 16122543.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of Cr(VI) from wastewater using rice bran. AU - Singh,K K, AU - Rastogi,R, AU - Hasan,S H, PY - 2005/01/24/received PY - 2005/04/03/revised PY - 2005/04/05/accepted PY - 2005/8/27/pubmed PY - 2006/11/7/medline PY - 2005/8/27/entrez SP - 61 EP - 8 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 290 IS - 1 N2 - The novel biosorbent rice bran has been successfully utilized for the removal of Cr(VI) from wastewater. The maximum removal of Cr(VI) was found to be 99.4% at pH 2.0, initial Cr(VI) concentration of 200 mg l(-1), and temperature 20 degrees C. The effect of different parameters such as contact time, adsorbate concentration, pH of the medium, and temperature was investigated. The adsorption kinetics was tested for first-order reversible, pseudo-first-order, and pseudo-second-order; reaction and the rate constants of kinetic models were calculated. Mass transfer of Cr(VI) from the bulk to the solid phase (rice bran) was studied at different temperatures. Different thermodynamic parameters, viz., changes in standard free energy, enthalpy, and entropy, have also been evaluated and it has been found that the reaction was spontaneous and endothermic in nature. The Langmuir and Freundlich equations for describing adsorption equilibrium were applied to data. The constants and correlation coefficients of these isotherm models were calculated and compared. Desorption studies was also carried out and found that complete desorption of Cr(VI) took place at pH of 9.5. The data were also subjected to multiple regression analysis and a model was developed to predict the removal of Cr(VI) from wastewater. SN - 0021-9797 UR - https://www.unboundmedicine.com/medline/citation/16122543/Removal_of_Cr_VI__from_wastewater_using_rice_bran_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(05)00386-3 DB - PRIME DP - Unbound Medicine ER -