Degradation of n-butyl benzyl phthalate using TiO₂/UV

TY - JOUR

T1 - Degradation of n-butyl benzyl phthalate using TiO2/UV

AU - Xu, Xiang Rong

AU - Li, Shen Xin

AU - Li, Xiao Yan

AU - Gu, Ji Dong

AU - Chen, Feng

AU - Li, Xiang Zhong

AU - Li, Hua Bin

N1 - Funding Information: This research was partially supported by the Postdoctoral Fellowship from The Hong Kong Polytechnic University (Project No.: G-YX0M), and the CRCG (The University of Hong Kong Committee on Research and Conference Grants).

PY - 2009/5/30

Y1 - 2009/5/30

N2 - n-Butyl benzyl phthalate (BBP) has been classified as endocrine disrupting compound and priority pollutant. Effects of TiO2 dosage, pH, initial BBP concentration and co-existing substances on the degradation of BBP by TiO2/UV process were investigated. The optimal TiO2 dosage and pH value for the BBP degradation were 2.0 g L-1 and 7.0, respectively. The degradation rate of BBP by TiO2/UV process could be fitted pseudo-first-order kinetics. The effects of co-existing substances on the degradation rate of BBP revealed that some anions (such as BrO3-, ClO4- and Cr2O72-) could enhance BBP degradation, and other anions would restrain BBP degradation. The sequence of inhibition was PO43- > CO32- > NO3- > SO42- > Cl-. The cations K+, Na+, Mg2+ and Ca2+ had the restrained effect on the BBP degradation, and the effect of Ca2+ was the strongest among four cations tested. The organic compounds acetone and methanol decreased the degradation rate of BBP. The major intermediates of BBP degradation were identified as mono-butyl phthalate, mono-benzyl phthalate and phthalic acid, and a primary degradation mechanism was proposed.

AB - n-Butyl benzyl phthalate (BBP) has been classified as endocrine disrupting compound and priority pollutant. Effects of TiO2 dosage, pH, initial BBP concentration and co-existing substances on the degradation of BBP by TiO2/UV process were investigated. The optimal TiO2 dosage and pH value for the BBP degradation were 2.0 g L-1 and 7.0, respectively. The degradation rate of BBP by TiO2/UV process could be fitted pseudo-first-order kinetics. The effects of co-existing substances on the degradation rate of BBP revealed that some anions (such as BrO3-, ClO4- and Cr2O72-) could enhance BBP degradation, and other anions would restrain BBP degradation. The sequence of inhibition was PO43- > CO32- > NO3- > SO42- > Cl-. The cations K+, Na+, Mg2+ and Ca2+ had the restrained effect on the BBP degradation, and the effect of Ca2+ was the strongest among four cations tested. The organic compounds acetone and methanol decreased the degradation rate of BBP. The major intermediates of BBP degradation were identified as mono-butyl phthalate, mono-benzyl phthalate and phthalic acid, and a primary degradation mechanism was proposed.

KW - Degradation

KW - Kinetics

KW - Mechanism

KW - Photocatalysis

KW - n-Butyl benzyl phthalate

UR - http://www.scopus.com/inward/record.url?scp=62649145636&partnerID=8YFLogxK

U2 - 10.1016/j.jhazmat.2008.08.027

DO - 10.1016/j.jhazmat.2008.08.027

M3 - 文章

C2 - 18818016

AN - SCOPUS:62649145636

SN - 0304-3894

VL - 164

SP - 527

EP - 532

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - 2-3

ER -