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Batch removal of chromium(VI) from aqueous solution by Turkish brown coals.
Bioresour Technol. 2007 Nov; 98(15):2836-45.BT

Abstract

The ability of using low-rank Turkish brown coals (Ilgin: BC1, Beyşehir: BC2, and Ermenek: BC3) to remove Cr(VI) from aqueous solutions was studied as a function of contact time, solution pH, temperature, concentration of metal solutions and amount of adsorbent. Their sorption properties were compared with the activated carbon from Chemviron (AQ-30). Adsorption of Cr(VI) uptake is in all cases pH-dependent showing a maximum at equilibrium pH values between 2.0 and 3.2, depending on the biomaterial, that correspond to initial pH values of 2.3 units for BC1, 3.0 units for BC2 and 3.2 units for BC3 and AQ-30. Batch equilibrium tests showed that the Cr(VI) removal was fitted with Freundlich isotherm and the adsorption reached equilibrium in 80 min. It was proceeding effectively into a short acid pH interval (2.0-3.2) where processes of Cr(VI) sorption are maximized. It was observed that the maximum adsorption capacity of 11.2 mM of Cr(VI)/g for Ilgin (BC1), 12.4 mM of Cr(VI)/g for Beyşehir (BC2), 7.4 mM of Cr(VI)/g for Ermenek (BC3) and 6.8 mM of Cr(VI)/g for activated carbon (AQ-30) was achieved at pH of 3.0. The rise in temperature caused a slight decrease in the value of the equilibrium constant (K(c)) for the sorption of Cr(VI) ion. The Cr(VI) sorption capacities of Beyşehir and Ilgin brown coals were the same. Ermenek brown coals and activated carbon (AQ-30) showed a similar sorption capacity.

Authors+Show Affiliations

Department of Chemistry, Selcuk University, Campus, 42079 Konya, Turkey.No affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

17113283

Citation

Arslan, Gulsin, and Erol Pehlivan. "Batch Removal of chromium(VI) From Aqueous Solution By Turkish Brown Coals." Bioresource Technology, vol. 98, no. 15, 2007, pp. 2836-45.
Arslan G, Pehlivan E. Batch removal of chromium(VI) from aqueous solution by Turkish brown coals. Bioresour Technol. 2007;98(15):2836-45.
Arslan, G., & Pehlivan, E. (2007). Batch removal of chromium(VI) from aqueous solution by Turkish brown coals. Bioresource Technology, 98(15), 2836-45.
Arslan G, Pehlivan E. Batch Removal of chromium(VI) From Aqueous Solution By Turkish Brown Coals. Bioresour Technol. 2007;98(15):2836-45. PubMed PMID: 17113283.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Batch removal of chromium(VI) from aqueous solution by Turkish brown coals. AU - Arslan,Gulsin, AU - Pehlivan,Erol, Y1 - 2006/11/17/ PY - 2006/03/23/received PY - 2006/08/29/revised PY - 2006/09/27/accepted PY - 2006/11/23/pubmed PY - 2007/9/15/medline PY - 2006/11/23/entrez SP - 2836 EP - 45 JF - Bioresource technology JO - Bioresour Technol VL - 98 IS - 15 N2 - The ability of using low-rank Turkish brown coals (Ilgin: BC1, Beyşehir: BC2, and Ermenek: BC3) to remove Cr(VI) from aqueous solutions was studied as a function of contact time, solution pH, temperature, concentration of metal solutions and amount of adsorbent. Their sorption properties were compared with the activated carbon from Chemviron (AQ-30). Adsorption of Cr(VI) uptake is in all cases pH-dependent showing a maximum at equilibrium pH values between 2.0 and 3.2, depending on the biomaterial, that correspond to initial pH values of 2.3 units for BC1, 3.0 units for BC2 and 3.2 units for BC3 and AQ-30. Batch equilibrium tests showed that the Cr(VI) removal was fitted with Freundlich isotherm and the adsorption reached equilibrium in 80 min. It was proceeding effectively into a short acid pH interval (2.0-3.2) where processes of Cr(VI) sorption are maximized. It was observed that the maximum adsorption capacity of 11.2 mM of Cr(VI)/g for Ilgin (BC1), 12.4 mM of Cr(VI)/g for Beyşehir (BC2), 7.4 mM of Cr(VI)/g for Ermenek (BC3) and 6.8 mM of Cr(VI)/g for activated carbon (AQ-30) was achieved at pH of 3.0. The rise in temperature caused a slight decrease in the value of the equilibrium constant (K(c)) for the sorption of Cr(VI) ion. The Cr(VI) sorption capacities of Beyşehir and Ilgin brown coals were the same. Ermenek brown coals and activated carbon (AQ-30) showed a similar sorption capacity. SN - 0960-8524 UR - https://www.unboundmedicine.com/medline/citation/17113283/Batch_removal_of_chromium_VI__from_aqueous_solution_by_Turkish_brown_coals_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0960-8524(06)00506-2 DB - PRIME DP - Unbound Medicine ER -
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