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Titolo:
LIGNINASE-CATALYZED DECOLORIZATION OF SYNTHETIC DYES
Autore:
YOUNG L; YU J;
Indirizzi:
HONG KONG UNIV SCI & TECHNOL,DEPT CHEM ENGN,CLEAR WATER BAY KOWLOON HONG KONG HONG KONG UNIV SCI & TECHNOL,DEPT CHEM ENGN KOWLOON HONG KONG
Titolo Testata:
Water research
fascicolo: 5, volume: 31, anno: 1997,
pagine: 1187 - 1193
SICI:
0043-1354(1997)31:5<1187:LDOSD>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
FUNGUS PHANEROCHAETE-CHRYSOSPORIUM; VERATRYL ALCOHOL; AZO DYES; PEROXIDASE; ENZYME; BIODEGRADATION; DEGRADATION;
Keywords:
DYE; DECOLORIZATION; WHITE-ROT FUNGI; PEROXIDASE; LIGNINASE; WASTE-WATER; ENZYMATIC OXIDATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
L. Young e J. Yu, "LIGNINASE-CATALYZED DECOLORIZATION OF SYNTHETIC DYES", Water research, 31(5), 1997, pp. 1187-1193

Abstract

Many synthetic dyes in industrial wastewaters are resistant to degradation in conventional biological treatment process. Decolorization of eight synthetic dyes including ate, anthraquinone, metal complex and indigo were examined in white-rot fungal cultures and by fungal peroxidase-catalysed oxidation. The dyes were not decolorized by manganese-dependent peroxidase (MnP) while above 80% color was removed by ligninase-catalysed oxidation. Dye decolorization rate increased linearly withligninase doses. Compared with fungal cultures in which ligninase wasdetected, partially purified ligninase showed a consistent and higherextent of dye decolorization with other essential components being provided such as veratryl alcohol, hydrogen peroxide and acidic pH (3.5-5). Veratryl alcohol had a critical concentration level above which nofurther effect on dye decolorization was observed. Depending on the influence of H2O2 on dye decolorization, the eight dyes can be divided into two groups; one had an optimum H2O2 concentration and the other showed increased decolorization with high H2O2 doses. Dye concentrationhad a negative effect on decolorization rate in general. The dye concentration above which the negative effect was observed varied from 10 to 125 mg/L, depending on individual dye structure. These results indicate that a highly efficient bioprocess using white-rot fungi to remove color from industrial effluents should produce ligninase, H2O2, veratryl alcohol continuously and coordinately under acidic condition and controlled back-mixing flow of wastewater. (C) 1997 Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 16:49:13