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Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran.
J Hazard Mater. 2007 Mar 22; 141(3):753-61.JH

Abstract

Sulphuric acid-treated wheat bran (STWB) was used as an adsorbent to remove Pb(II) ions from aqueous solution. It was observed that the adsorption yield of Pb(II) ions was found to be pH dependent. The equilibrium time for the process was determined as 2h. STWB gave the highest adsorption yield at around pH 6.0. At this pH, adsorption percentage for an initial Pb(II) ions concentration of 100mg/L was found to be 82.8 at 25 degrees C for contact time of 2h. The equilibrium data obtained at different temperatures fitted to the non-linear form of Langmuir, Freundlich and Redlich-Peterson and linear form of Langmuir and Freundlich models. Isotherm constants were calculated and compared for the models used. The maximum adsorption capacity (q(max)) which was obtained linear form of Langmuir model increased from 55.56 to 79.37mg/g with increasing temperature from 25 to 60 degrees C. Similar trend was observed for other isotherm constants related to the adsorption capacity. Linear form of Langmuir isotherm data was evaluated to determine the thermodynamic parameters for the process. Thermodynamic parameters show that adsorption process of Pb(II) ions is an endothermic and more effective process at high temperatures. The pseudo nth order kinetic model was successfully applied to the kinetic data and the order (n) of adsorption reaction was calculated at the range from 1.711 to 1.929. The values of k(ad) were found to be 5.82x10(-4) and 21.81x10(-4)(min(-1))(mg/g)(1-n) at 25 and 60 degrees C, respectively. Activation energy was determined as 29.65kJ/mol for the process. This suggest that the adsorption Pb(II) ions by STWB is chemically controlled.

Authors+Show Affiliations

Department of Chemical Engineering, University of Firat, Elaziğ 23279, Turkey. aozer@firat.edu

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16938389

Citation

Ozer, A. "Removal of Pb(II) Ions From Aqueous Solutions By Sulphuric Acid-treated Wheat Bran." Journal of Hazardous Materials, vol. 141, no. 3, 2007, pp. 753-61.
Ozer A. Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran. J Hazard Mater. 2007;141(3):753-61.
Ozer, A. (2007). Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran. Journal of Hazardous Materials, 141(3), 753-61.
Ozer A. Removal of Pb(II) Ions From Aqueous Solutions By Sulphuric Acid-treated Wheat Bran. J Hazard Mater. 2007 Mar 22;141(3):753-61. PubMed PMID: 16938389.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of Pb(II) ions from aqueous solutions by sulphuric acid-treated wheat bran. A1 - Ozer,A, Y1 - 2006/07/25/ PY - 2006/05/24/received PY - 2006/07/20/revised PY - 2006/07/20/accepted PY - 2006/8/30/pubmed PY - 2007/5/19/medline PY - 2006/8/30/entrez SP - 753 EP - 61 JF - Journal of hazardous materials JO - J Hazard Mater VL - 141 IS - 3 N2 - Sulphuric acid-treated wheat bran (STWB) was used as an adsorbent to remove Pb(II) ions from aqueous solution. It was observed that the adsorption yield of Pb(II) ions was found to be pH dependent. The equilibrium time for the process was determined as 2h. STWB gave the highest adsorption yield at around pH 6.0. At this pH, adsorption percentage for an initial Pb(II) ions concentration of 100mg/L was found to be 82.8 at 25 degrees C for contact time of 2h. The equilibrium data obtained at different temperatures fitted to the non-linear form of Langmuir, Freundlich and Redlich-Peterson and linear form of Langmuir and Freundlich models. Isotherm constants were calculated and compared for the models used. The maximum adsorption capacity (q(max)) which was obtained linear form of Langmuir model increased from 55.56 to 79.37mg/g with increasing temperature from 25 to 60 degrees C. Similar trend was observed for other isotherm constants related to the adsorption capacity. Linear form of Langmuir isotherm data was evaluated to determine the thermodynamic parameters for the process. Thermodynamic parameters show that adsorption process of Pb(II) ions is an endothermic and more effective process at high temperatures. The pseudo nth order kinetic model was successfully applied to the kinetic data and the order (n) of adsorption reaction was calculated at the range from 1.711 to 1.929. The values of k(ad) were found to be 5.82x10(-4) and 21.81x10(-4)(min(-1))(mg/g)(1-n) at 25 and 60 degrees C, respectively. Activation energy was determined as 29.65kJ/mol for the process. This suggest that the adsorption Pb(II) ions by STWB is chemically controlled. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16938389/Removal_of_Pb_II__ions_from_aqueous_solutions_by_sulphuric_acid_treated_wheat_bran_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)00839-9 DB - PRIME DP - Unbound Medicine ER -