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Studies on hexavalent chromium biosorption by chemically-treated biomass of Ecklonia sp.
Chemosphere. 2005 Sep; 60(10):1356-64.C

Abstract

The biomass of the brown seaweed, Ecklonia sp., is capable of reducing Cr(VI) to Cr(III). However, very little is known about the mechanism of Cr(VI) reduction by the biomass. The aims of the present investigation were to enhance the Cr(VI)-reducing capacity of the biomass using various chemical treatments and to elucidate the mechanisms governing Cr(VI) reduction. Among the various chemical treatments, acid-treatment showed the best performance with regards the improvement of Cr(VI) removal from the aqueous phase, while organic solvent-treatment significantly improved the removal efficiency of total Cr in the equilibrium state. Based on FTIR study, the biomass was subjected to chemical modification of its amino and carboxyl groups, to examine their roles in the Cr(VI) removal from the aqueous phase. Methylation of the amino group significantly decreased the Cr(VI) removal rate, but amination of the carboxyl group significantly increased the Cr(VI) removal rate. Meanwhile, esterification of the carboxyl group and carboxylation of the amino group decreased the Cr(VI) removal rate, but the former showed a more negative effect than the latter. These findings indicated that the amino and carboxyl groups take part in the Cr(VI) removal from the aqueous phase. In conclusion, mechanisms for direct and indirect Cr(VI) removal are proposed, and some aspects for the application of this biomass to Cr(VI) detoxification are discussed.

Authors+Show Affiliations

Advanced Environmental Biotechnology Research Center, Department of Chemical Engineering, School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, South Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16054904

Citation

Park, Donghee, et al. "Studies On Hexavalent Chromium Biosorption By Chemically-treated Biomass of Ecklonia Sp." Chemosphere, vol. 60, no. 10, 2005, pp. 1356-64.
Park D, Yun YS, Park JM. Studies on hexavalent chromium biosorption by chemically-treated biomass of Ecklonia sp. Chemosphere. 2005;60(10):1356-64.
Park, D., Yun, Y. S., & Park, J. M. (2005). Studies on hexavalent chromium biosorption by chemically-treated biomass of Ecklonia sp. Chemosphere, 60(10), 1356-64.
Park D, Yun YS, Park JM. Studies On Hexavalent Chromium Biosorption By Chemically-treated Biomass of Ecklonia Sp. Chemosphere. 2005;60(10):1356-64. PubMed PMID: 16054904.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Studies on hexavalent chromium biosorption by chemically-treated biomass of Ecklonia sp. AU - Park,Donghee, AU - Yun,Yeoung-Sang, AU - Park,Jong Moon, Y1 - 2005/04/07/ PY - 2004/10/17/received PY - 2005/01/25/revised PY - 2005/02/09/accepted PY - 2005/8/2/pubmed PY - 2005/11/4/medline PY - 2005/8/2/entrez SP - 1356 EP - 64 JF - Chemosphere JO - Chemosphere VL - 60 IS - 10 N2 - The biomass of the brown seaweed, Ecklonia sp., is capable of reducing Cr(VI) to Cr(III). However, very little is known about the mechanism of Cr(VI) reduction by the biomass. The aims of the present investigation were to enhance the Cr(VI)-reducing capacity of the biomass using various chemical treatments and to elucidate the mechanisms governing Cr(VI) reduction. Among the various chemical treatments, acid-treatment showed the best performance with regards the improvement of Cr(VI) removal from the aqueous phase, while organic solvent-treatment significantly improved the removal efficiency of total Cr in the equilibrium state. Based on FTIR study, the biomass was subjected to chemical modification of its amino and carboxyl groups, to examine their roles in the Cr(VI) removal from the aqueous phase. Methylation of the amino group significantly decreased the Cr(VI) removal rate, but amination of the carboxyl group significantly increased the Cr(VI) removal rate. Meanwhile, esterification of the carboxyl group and carboxylation of the amino group decreased the Cr(VI) removal rate, but the former showed a more negative effect than the latter. These findings indicated that the amino and carboxyl groups take part in the Cr(VI) removal from the aqueous phase. In conclusion, mechanisms for direct and indirect Cr(VI) removal are proposed, and some aspects for the application of this biomass to Cr(VI) detoxification are discussed. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/16054904/Studies_on_hexavalent_chromium_biosorption_by_chemically_treated_biomass_of_Ecklonia_sp_ DB - PRIME DP - Unbound Medicine ER -