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Adsorption of hexavalent chromium from aqueous solution on raw and modified activated carbon.
Water Environ Res. 2009 Jul; 81(7):728-34.WE

Abstract

Hexavalent chromium [Cr(VI)] is toxic and readily adsorbed by some adsorbents; therefore, its removal from wastewater is extremely important. Batch adsorption of Cr(VI) from aqueous solution using raw and acid-modified activated carbon was investigated in this study. The Cr(VI) sorption was found to be dependent on pH, contact time, initial concentration of solution, adsorbent dose, and temperature. The maximum efficiencies of Cr(VI) removal were 97.67 and 99.87% for activated carbon (AC0) and modified activated carbon (AC1), respectively. The maximum adsorption capacity was found to be 4.75 and 5.95 mg/g for AC0 and AC1, respectively. Thermodynamic parameters indicate that the adsorption process was endothermic and spontaneous in nature. Freundlich adsorption isotherm model was fitted well the equilibrium data for both adsorbents. The Cr(VI) uptake by AC0 and AC1 followed pseudo first-order and second-order kinetics, but was best described by the pseudo second-order rate model. The results also showed that both film diffusion and intraparticle diffusion were concurrently operating, but that intraparticle diffusion controlled the adsorption mechanism.

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Authors+Show Affiliations

Tang C
College of Resource and Environment, Central South University of Forestry & Technology, Changsha, China.
Zhang R
No affiliation info available
Wen S
No affiliation info available
Li K
No affiliation info available
Zheng X
No affiliation info available
Zhu M
No affiliation info available

MeSH

AdsorptionCharcoalChromiumKineticsSolutionsThermodynamicsWater Purification

Pub Type(s)

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

Language

eng

PubMed ID

19691254

Citation

Tang, Chunfang, et al. "Adsorption of Hexavalent Chromium From Aqueous Solution On Raw and Modified Activated Carbon." Water Environment Research : a Research Publication of the Water Environment Federation, vol. 81, no. 7, 2009, pp. 728-34.
Tang C, Zhang R, Wen S, et al. Adsorption of hexavalent chromium from aqueous solution on raw and modified activated carbon. Water Environ Res. 2009;81(7):728-34.
Tang, C., Zhang, R., Wen, S., Li, K., Zheng, X., & Zhu, M. (2009). Adsorption of hexavalent chromium from aqueous solution on raw and modified activated carbon. Water Environment Research : a Research Publication of the Water Environment Federation, 81(7), 728-34.
Tang C, et al. Adsorption of Hexavalent Chromium From Aqueous Solution On Raw and Modified Activated Carbon. Water Environ Res. 2009;81(7):728-34. PubMed PMID: 19691254.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorption of hexavalent chromium from aqueous solution on raw and modified activated carbon. AU - Tang,Chunfang, AU - Zhang,Riqing, AU - Wen,Shizhi, AU - Li,Kelin, AU - Zheng,Xiaoli, AU - Zhu,Mingqi, PY - 2009/8/21/entrez PY - 2009/8/21/pubmed PY - 2009/12/24/medline SP - 728 EP - 34 JF - Water environment research : a research publication of the Water Environment Federation JO - Water Environ Res VL - 81 IS - 7 N2 - Hexavalent chromium [Cr(VI)] is toxic and readily adsorbed by some adsorbents; therefore, its removal from wastewater is extremely important. Batch adsorption of Cr(VI) from aqueous solution using raw and acid-modified activated carbon was investigated in this study. The Cr(VI) sorption was found to be dependent on pH, contact time, initial concentration of solution, adsorbent dose, and temperature. The maximum efficiencies of Cr(VI) removal were 97.67 and 99.87% for activated carbon (AC0) and modified activated carbon (AC1), respectively. The maximum adsorption capacity was found to be 4.75 and 5.95 mg/g for AC0 and AC1, respectively. Thermodynamic parameters indicate that the adsorption process was endothermic and spontaneous in nature. Freundlich adsorption isotherm model was fitted well the equilibrium data for both adsorbents. The Cr(VI) uptake by AC0 and AC1 followed pseudo first-order and second-order kinetics, but was best described by the pseudo second-order rate model. The results also showed that both film diffusion and intraparticle diffusion were concurrently operating, but that intraparticle diffusion controlled the adsorption mechanism. SN - 1061-4303 UR - https://www.unboundmedicine.com/medline/citation/19691254/Adsorption_of_hexavalent_chromium_from_aqueous_solution_on_raw_and_modified_activated_carbon_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1061-4303&date=2009&volume=81&issue=7&spage=728 DB - PRIME DP - Unbound Medicine ER -