TY - JOUR

T1 - Photocatalytic degradation of brilliant red dye and textile wastewater

AU - Martins, Ayrton F.

AU - Wilde, Marcelo L.

AU - Da Silveira, Carla

N1 - Funding Information: The authors wish to thank the Brazilian agency CNPq for the scholarships and financial support.

PY - 2006/5/1

Y1 - 2006/5/1

N2 - The degradation of textile wastewater and brilliant red dye solutions in a coil photoreactor provided with recirculation, assisted by powdered TiO 2 and medium-pressure mercury lamp irradiation, was investigated. Factorial design was used for the attainment of the best conditions for COD and color abatement. pH and TiO2 loading showed to be critical variables for the photocatalytic degradation process for both textile wastewater and aqueous reactive dye solutions (25 mg L-1). For both substrates, the optimized process conditions by factorial design were almost the same (pH 2-3, 444 mg TiO2 L-1 loading, 5 L h-1 recirculation flow-rate). A 41% COD abatement for textile wastewater was obtained with a 120 min treatment. For the Brilliant Red dye solutions, a 20 min treatment resulted in about 90% decolorization (517 nm, pH 5), as well as in a reduction of 66% of the integrated absorbance (200-600 nm, pH 5).

AB - The degradation of textile wastewater and brilliant red dye solutions in a coil photoreactor provided with recirculation, assisted by powdered TiO 2 and medium-pressure mercury lamp irradiation, was investigated. Factorial design was used for the attainment of the best conditions for COD and color abatement. pH and TiO2 loading showed to be critical variables for the photocatalytic degradation process for both textile wastewater and aqueous reactive dye solutions (25 mg L-1). For both substrates, the optimized process conditions by factorial design were almost the same (pH 2-3, 444 mg TiO2 L-1 loading, 5 L h-1 recirculation flow-rate). A 41% COD abatement for textile wastewater was obtained with a 120 min treatment. For the Brilliant Red dye solutions, a 20 min treatment resulted in about 90% decolorization (517 nm, pH 5), as well as in a reduction of 66% of the integrated absorbance (200-600 nm, pH 5).

KW - Chemistry

KW - Coil photoreactor

KW - Dye

KW - Photocatalytic treatment

KW - Textile wastewater

UR - http://www.scopus.com/inward/record.url?scp=33646576507&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/49daf763-243a-3fd4-9f15-55955b199000/

U2 - 10.1080/10934520600575069

DO - 10.1080/10934520600575069

M3 - Journal articles

C2 - 16779940

AN - SCOPUS:33646576507

VL - 41

SP - 675

EP - 685

JO - Journal of Environmental Science and Health, Part A. Toxic/Hazardous Substances and Environmental Engineering

JF - Journal of Environmental Science and Health, Part A. Toxic/Hazardous Substances and Environmental Engineering

SN - 1093-4529

IS - 4

ER -