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Titolo:
MICROBIAL CHROMIUM(VI) REDUCTION
Autore:
CHEN JM; HAO OJ;
Indirizzi:
UNIV MARYLAND,DEPT CIVIL ENGN COLLEGE PK MD 20742 UNIV MARYLAND,DEPT CIVIL ENGN COLLEGE PK MD 20742
Titolo Testata:
Critical reviews in environmental science and technology
fascicolo: 3, volume: 28, anno: 1998,
pagine: 219 - 251
SICI:
1064-3389(1998)28:3<219:MCR>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENTEROBACTER-CLOACAE STRAIN; CHROMATE-REDUCING STRAIN; PSEUDOMONAS-AMBIGUA G-1; PLASMID-DETERMINED RESISTANCE; ESCHERICHIA-COLI ATCC-33456; ACTIVATED-SLUDGE PROCESS; HEXAVALENT CHROMIUM; WASTE-WATER; AGROBACTERIUM-RADIOBACTER; ENZYMATIC REDUCTION;
Keywords:
CR(VI); INHIBITORY EFFECT; MICROBIAL CR(VI) RESISTANCE; MICROBIAL CR(VI) REDUCTION; BIOLOGICAL TREATMENT; CR(VI) WASTES;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
111
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Chen e O.J. Hao, "MICROBIAL CHROMIUM(VI) REDUCTION", Critical reviews in environmental science and technology, 28(3), 1998, pp. 219-251

Abstract

This review was conducted to describe the microbial reduction of hexavalent chromium [Cr(VI)] in general and a potential for biological treatment of Cr(VI)-containing wastes in particular. Cr(VI) is the highest oxidation state of the metal chromium, which is widely used in various industries. Chromate (CrO42-) is the prevalent species of Cr(VI) innatural aqueous environments and is the major pollutant from Cr-related industries. Cr(VI) exhibits inhibitory effects on biological wastewater treatment processes. Several microorganisms, however, have been found to be able to resist and/or reduce Cr(VI) within a wide range of Cr(VI) concentrations. The microbial Cr(VI:) reduction activities are either plasmid-or membrane-associated phenomena. Factors affecting microbial Cr(VI) reduction, including biomass concentration, initial Cr(VI) level, carbon source, pH and temperature, oxidation-reduction potential, oxyanions and metal cations, are discussed. The kinetic models for Cr(VI) reduction are described. Biological reduction of Cr(VI) demonstrates some potential as an innovative technology for remediation ofCr(VI)-contaminated environments, More mixed culture studies are needed to develop the proper biological reactor systems prior to field tests. In addition, more comprehensive kinetic models should be developedas a basis for engineering design and operation of biological Cr(VI)-removal processes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/05/20 alle ore 21:44:33