Degradation of dyes in aqueous solutions by the Fenton process

TY - JOUR

T1 - Degradation of dyes in aqueous solutions by the Fenton process

AU - Xu, Xiang Rong

AU - Li, Hua Bin

AU - Wang, Wen Hua

AU - Gu, Ji Dong

PY - 2004/11

Y1 - 2004/11

N2 - Degradation of 20 different dyes in aqueous solutions by the Fenton process was performed. These dyes include 6 types: acidic, reactive, direct, cationic, disperse and vat dyes. The former four types of dyes were decolorized and their TOC values were decreased greatly, while the color and TOC removals of the latter two types were lower. The catalytic activities of four metal ions on the degradation efficiencies of Vat Blue BO, which was chosen as a model dye because of its lowest color and TOC removals, were compared in the dark and under the ultraviolet light irradiation. The catalytic ability of different metals was Fe 2+ > Cu 2+ > Mn 2+ > Ag + in the dark, and the same sequence was obtained under irradiation condition with greater degradation efficiency. Furthermore, the efficiencies of three oxidation processes, including H 2O 2/UV, Fe 2+/H 2O 2 and Fe 2+/H 2O 2/UV were compared. The results showed that the oxidation by Fe 2+/H 2O 2/UV was the strongest, and even greater than the arithmetic sum of the other two processes, which suggests the synergistic effect of ultraviolet and ferrous ions on the degradation reaction.

AB - Degradation of 20 different dyes in aqueous solutions by the Fenton process was performed. These dyes include 6 types: acidic, reactive, direct, cationic, disperse and vat dyes. The former four types of dyes were decolorized and their TOC values were decreased greatly, while the color and TOC removals of the latter two types were lower. The catalytic activities of four metal ions on the degradation efficiencies of Vat Blue BO, which was chosen as a model dye because of its lowest color and TOC removals, were compared in the dark and under the ultraviolet light irradiation. The catalytic ability of different metals was Fe 2+ > Cu 2+ > Mn 2+ > Ag + in the dark, and the same sequence was obtained under irradiation condition with greater degradation efficiency. Furthermore, the efficiencies of three oxidation processes, including H 2O 2/UV, Fe 2+/H 2O 2 and Fe 2+/H 2O 2/UV were compared. The results showed that the oxidation by Fe 2+/H 2O 2/UV was the strongest, and even greater than the arithmetic sum of the other two processes, which suggests the synergistic effect of ultraviolet and ferrous ions on the degradation reaction.

KW - Hydrogen peroxide

KW - Oxidation

KW - Textile

KW - Treatment

KW - Wastewater

UR - http://www.scopus.com/inward/record.url?scp=5444236461&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2004.07.030

DO - 10.1016/j.chemosphere.2004.07.030

M3 - 文章

C2 - 15488921

AN - SCOPUS:5444236461

SN - 0045-6535

VL - 57

SP - 595

EP - 600

JO - Chemosphere

JF - Chemosphere

IS - 7

ER -