Mechanism of hexavalent chromium removal by dead fungal biomass of Aspergillus niger

被引:339
作者
Park, D
Yun, YS
Jo, JH
Park, JM
机构
[1] Pohang Univ Sci & Technol, Adv Environm Biotechnol Res Ctr, Dept Chem Engn, Sch Environm Sci & Engn, Pohang 790784, South Korea
[2] Chonbuk Natl Univ, Div Environm & Chem Engn, Ind Technol Res Inst, Chonju 561756, South Korea
关键词
biosorption; hexavalent chromium; fungi; reduction; detoxification;
D O I
10.1016/j.watres.2004.11.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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). (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:533 / 540
页数:8
相关论文
共 26 条
[1]   Chromium as an essential nutrient for humans [J].
Anderson, RA .
REGULATORY TOXICOLOGY AND PHARMACOLOGY, 1997, 26 (01) :S35-S41
[2]  
Bai RS, 2003, BIORESOURCE TECHNOL, V87, P17, DOI 10.1016/S0960-8524(02)00222-5
[3]   Studies on enhancement of Cr(VI) biosorption by chemically modified biomass of Rhizopus nigricans [J].
Bai, RS ;
Abraham, TE .
WATER RESEARCH, 2002, 36 (05) :1224-1236
[4]  
Bai S, 2001, BIORESOURCE TECHNOL, V79, P73, DOI 10.1016/S0960-8524(00)00107-3
[5]   Multiparametric porous silicon sensors [J].
Baratto, C ;
Faglia, G ;
Sberveglieri, G ;
Gaburro, Z ;
Pancheri, L ;
Oton, C ;
Pavesi, L .
SENSORS, 2002, 2 (03) :121-126
[6]   Occurrences, uses, and properties of chromium [J].
Barnhart, J .
REGULATORY TOXICOLOGY AND PHARMACOLOGY, 1997, 26 (01) :S3-S7
[7]  
Clesceri L., 1998, STANDARD METHODS EXA, P366
[8]   Potential hazards of hexavalent chromate in our drinking water [J].
Costa, M .
TOXICOLOGY AND APPLIED PHARMACOLOGY, 2003, 188 (01) :1-5
[9]   Characterization of metal ion interactions with chitosan by X-ray photoelectron spectroscopy [J].
Dambies, L ;
Guimon, C ;
Yiacoumi, S ;
Guibal, E .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 177 (2-3) :203-214
[10]   Characterization of Cr(VI) binding and reduction to Cr(III) by the agricultural byproducts of Avena monida (Oat) biomass [J].
Gardea-Torresday, JL ;
Tiemann, KJ ;
Armendariz, V ;
Bess-Oberto, L ;
Chianelli, RR ;
Rios, J ;
Parsons, JG ;
Gamez, G .
JOURNAL OF HAZARDOUS MATERIALS, 2000, 80 (1-3) :175-188