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Removal of Cr(VI) from aqueous solution by two Lewatit-anion exchange resins.
J Hazard Mater. 2005 Mar 17; 119(1-3):175-82.JH

Abstract

The sorption of hexavalent chromium, Cr(VI), from aqueous solutions on macroporous resins containing tertiary amine groups (Lewatit MP 62 and Lewatit M 610) was studied at varying Cr(VI) concentrations, adsorbent dose, pH, contact time and temperatures. The concentration of chromium in aqueous solution was determined by inductively coupled plasma spectrometry (ICP-AES). Batch shaking sorption experiments were carried out to evaluate the performance of Lewatit MP 62 and Lewatit M 610 anion exchange resins in the removal of Cr(VI) from aqueous solutions. The ion-exchange process, which is pH dependent, shows maximum removal of Cr(VI) in the pH range 2-6 for an initial Cr(VI) concentration of 100 ppm. The sorption increases with the decrease in pH and slightly decreases with the increase in temperature. Both ion exchangers had high bonding constants with Lewatit M 610 showing stronger binding. It was observed that the maximum adsorption capacity of 0.40 mmol of Cr(VI)/g for Lewatit MP 62 and 0.41 mmol of Cr(VI)/g for Lewatit M 610 was achieved at pH of 5.0. The thermodynamic parameters (free energy change, DeltaG degrees ; enthalpy change, DeltaS degrees ; and entropy change, DeltaH degrees) for the sorption have been evaluated. The rise in temperature caused a slight decrease in the value of the equilibrium constant (Kc) for the sorption of Cr(VI) ion. The sorption of Cr(VI) on the resin was rapid during the first 15 min and equilibrium was found to be attained within 30 min. The sorption of Cr(VI) onto the resins followed reversible first-order rate kinetics. Such ion exchange resins can be used for the efficient removal of chromium from water and wastewater.

Authors+Show Affiliations

Department of Chemistry, Suleyman Demirel University, 32260 Isparta, Turkey. fgode@fef.sdu.edu.trNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15752863

Citation

Gode, Fethiye, and Erol Pehlivan. "Removal of Cr(VI) From Aqueous Solution By Two Lewatit-anion Exchange Resins." Journal of Hazardous Materials, vol. 119, no. 1-3, 2005, pp. 175-82.
Gode F, Pehlivan E. Removal of Cr(VI) from aqueous solution by two Lewatit-anion exchange resins. J Hazard Mater. 2005;119(1-3):175-82.
Gode, F., & Pehlivan, E. (2005). Removal of Cr(VI) from aqueous solution by two Lewatit-anion exchange resins. Journal of Hazardous Materials, 119(1-3), 175-82.
Gode F, Pehlivan E. Removal of Cr(VI) From Aqueous Solution By Two Lewatit-anion Exchange Resins. J Hazard Mater. 2005 Mar 17;119(1-3):175-82. PubMed PMID: 15752863.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of Cr(VI) from aqueous solution by two Lewatit-anion exchange resins. AU - Gode,Fethiye, AU - Pehlivan,Erol, PY - 2004/03/24/received PY - 2004/12/01/revised PY - 2004/12/05/accepted PY - 2005/3/9/pubmed PY - 2005/7/6/medline PY - 2005/3/9/entrez SP - 175 EP - 82 JF - Journal of hazardous materials JO - J Hazard Mater VL - 119 IS - 1-3 N2 - The sorption of hexavalent chromium, Cr(VI), from aqueous solutions on macroporous resins containing tertiary amine groups (Lewatit MP 62 and Lewatit M 610) was studied at varying Cr(VI) concentrations, adsorbent dose, pH, contact time and temperatures. The concentration of chromium in aqueous solution was determined by inductively coupled plasma spectrometry (ICP-AES). Batch shaking sorption experiments were carried out to evaluate the performance of Lewatit MP 62 and Lewatit M 610 anion exchange resins in the removal of Cr(VI) from aqueous solutions. The ion-exchange process, which is pH dependent, shows maximum removal of Cr(VI) in the pH range 2-6 for an initial Cr(VI) concentration of 100 ppm. The sorption increases with the decrease in pH and slightly decreases with the increase in temperature. Both ion exchangers had high bonding constants with Lewatit M 610 showing stronger binding. It was observed that the maximum adsorption capacity of 0.40 mmol of Cr(VI)/g for Lewatit MP 62 and 0.41 mmol of Cr(VI)/g for Lewatit M 610 was achieved at pH of 5.0. The thermodynamic parameters (free energy change, DeltaG degrees ; enthalpy change, DeltaS degrees ; and entropy change, DeltaH degrees) for the sorption have been evaluated. The rise in temperature caused a slight decrease in the value of the equilibrium constant (Kc) for the sorption of Cr(VI) ion. The sorption of Cr(VI) on the resin was rapid during the first 15 min and equilibrium was found to be attained within 30 min. The sorption of Cr(VI) onto the resins followed reversible first-order rate kinetics. Such ion exchange resins can be used for the efficient removal of chromium from water and wastewater. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/15752863/Removal_of_Cr_VI__from_aqueous_solution_by_two_Lewatit_anion_exchange_resins_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(04)00605-3 DB - PRIME DP - Unbound Medicine ER -