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Mechanism of hexavalent chromium removal by dead fungal biomass of Aspergillus niger.
Water Res. 2005 Feb; 39(4):533-40.WR

Abstract

When synthetic wastewater containing Cr(VI) was placed in contact with the dead fungal biomass of Aspergillus niger, the Cr(VI) was completely removed from aqueous solution, whereas Cr(III), which was not initially present, appeared in aqueous solution. Desorption and X-ray photoelectron spectroscopy (XPS) studies showed that most of the Cr bound on the biomass was in trivalent form. These results indicated that the main mechanism of Cr(VI) removal was a redox reaction between Cr(VI) and the dead fungal biomass, which is quite different from previously reported mechanisms. The influences of contact time, pH, Cr(VI) concentration, biomass concentration and temperature on Cr(VI) removal were also evaluated. The Cr(VI) removal rate increased with a decrease in pH and with increases in Cr(VI) concentration, biomass concentration and temperature. Although removal kinetics was dependent on the experimental conditions, Cr(VI) was completely removed in the aqueous solution. In conclusion, a new mechanism of Cr(VI) removal by the dead fungal biomass has been proposed. From a practical viewpoint, this abundant and inexpensive dead fungal biomass has potential application in the conversion of toxic Cr(VI) into less toxic or nontoxic Cr(III).

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, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

15707625

Citation

Park, Donghee, et al. "Mechanism of Hexavalent Chromium Removal By Dead Fungal Biomass of Aspergillus Niger." Water Research, vol. 39, no. 4, 2005, pp. 533-40.
Park D, Yun YS, Jo JH, et al. Mechanism of hexavalent chromium removal by dead fungal biomass of Aspergillus niger. Water Res. 2005;39(4):533-40.
Park, D., Yun, Y. S., Jo, J. H., & Park, J. M. (2005). Mechanism of hexavalent chromium removal by dead fungal biomass of Aspergillus niger. Water Research, 39(4), 533-40.
Park D, et al. Mechanism of Hexavalent Chromium Removal By Dead Fungal Biomass of Aspergillus Niger. Water Res. 2005;39(4):533-40. PubMed PMID: 15707625.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mechanism of hexavalent chromium removal by dead fungal biomass of Aspergillus niger. AU - Park,Donghee, AU - Yun,Yeoung-Sang, AU - Jo,Ji Hye, AU - Park,Jong Moon, Y1 - 2004/12/24/ PY - 2004/01/13/received PY - 2004/10/15/revised PY - 2004/11/07/accepted PY - 2005/2/15/pubmed PY - 2005/7/20/medline PY - 2005/2/15/entrez SP - 533 EP - 40 JF - Water research JO - Water Res VL - 39 IS - 4 N2 - When synthetic wastewater containing Cr(VI) was placed in contact with the dead fungal biomass of Aspergillus niger, the Cr(VI) was completely removed from aqueous solution, whereas Cr(III), which was not initially present, appeared in aqueous solution. Desorption and X-ray photoelectron spectroscopy (XPS) studies showed that most of the Cr bound on the biomass was in trivalent form. These results indicated that the main mechanism of Cr(VI) removal was a redox reaction between Cr(VI) and the dead fungal biomass, which is quite different from previously reported mechanisms. The influences of contact time, pH, Cr(VI) concentration, biomass concentration and temperature on Cr(VI) removal were also evaluated. The Cr(VI) removal rate increased with a decrease in pH and with increases in Cr(VI) concentration, biomass concentration and temperature. Although removal kinetics was dependent on the experimental conditions, Cr(VI) was completely removed in the aqueous solution. In conclusion, a new mechanism of Cr(VI) removal by the dead fungal biomass has been proposed. From a practical viewpoint, this abundant and inexpensive dead fungal biomass has potential application in the conversion of toxic Cr(VI) into less toxic or nontoxic Cr(III). SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/15707625/Mechanism_of_hexavalent_chromium_removal_by_dead_fungal_biomass_of_Aspergillus_niger_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(04)00527-5 DB - PRIME DP - Unbound Medicine ER -