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Photolytic reaction mechanism and impacts of coexisting substances on photodegradation of bisphenol A by Bi2WO6 in water.
Water Res. 2012 Mar 01; 46(3):845-53.WR

Abstract

Bi(2)WO(6) displayed great photolytic degradation efficiency to bisphenol A (BPA) under simulated solar light irradiation but its reaction mechanism and the impacts of coexisting substances on the degradation remain unclear. In present study, the reaction mechanism was investigated using DMPO spin-trapping ESR spectra and experiments with scavengers of hydroxyl radicals (*OH) and holes. The results supported that hole oxidation mainly governed the photodegradation process. As a common humic substance in natural water, humic acid accelerated the degradation of BPA when its concentration was 1mg/L, while the photodegradation was impeded with the increase of humic acid concentration in the range of 5-20mg/L. Almost all anions, including NO(3)(-), HCO(3)(-), Cl(-), SO(4)(2-) inhibited the degradation of BPA by Bi(2)WO(6) and their inhibition effects followed the order of SO(4)(2-)>Cl(-)>HCO(3)(-)>NO(3)(-). Cations of Na(+), K(+), Ca(2+) and Mg(2+) displayed slight suppressing effect on BPA degradation mainly due to the impact of Cl(-) coexisting in the solution. However, Cu(2+) hindered the BPA photodegradation heavily. Fe(3+) and H(2)O(2) affected the photodegradation in a complicated way: they suppressed or promoted the photodegradation depending on their concentrations. This could be the result of competition between photolyitc hole generated by Bi(2)WO(6) and OH produced by Fe(3+) or H(2)O(2.).

Authors+Show Affiliations

College of Environmental Science and Engineering, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300071, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22176744

Citation

Wang, Chunying, et al. "Photolytic Reaction Mechanism and Impacts of Coexisting Substances On Photodegradation of Bisphenol a By Bi2WO6 in Water." Water Research, vol. 46, no. 3, 2012, pp. 845-53.
Wang C, Zhu L, Wei M, et al. Photolytic reaction mechanism and impacts of coexisting substances on photodegradation of bisphenol A by Bi2WO6 in water. Water Res. 2012;46(3):845-53.
Wang, C., Zhu, L., Wei, M., Chen, P., & Shan, G. (2012). Photolytic reaction mechanism and impacts of coexisting substances on photodegradation of bisphenol A by Bi2WO6 in water. Water Research, 46(3), 845-53. https://doi.org/10.1016/j.watres.2011.11.057
Wang C, et al. Photolytic Reaction Mechanism and Impacts of Coexisting Substances On Photodegradation of Bisphenol a By Bi2WO6 in Water. Water Res. 2012 Mar 1;46(3):845-53. PubMed PMID: 22176744.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photolytic reaction mechanism and impacts of coexisting substances on photodegradation of bisphenol A by Bi2WO6 in water. AU - Wang,Chunying, AU - Zhu,Lingyan, AU - Wei,Mingcui, AU - Chen,Peng, AU - Shan,Guoqiang, Y1 - 2011/11/26/ PY - 2011/07/27/received PY - 2011/11/14/revised PY - 2011/11/20/accepted PY - 2011/12/20/entrez PY - 2011/12/20/pubmed PY - 2012/5/2/medline SP - 845 EP - 53 JF - Water research JO - Water Res VL - 46 IS - 3 N2 - Bi(2)WO(6) displayed great photolytic degradation efficiency to bisphenol A (BPA) under simulated solar light irradiation but its reaction mechanism and the impacts of coexisting substances on the degradation remain unclear. In present study, the reaction mechanism was investigated using DMPO spin-trapping ESR spectra and experiments with scavengers of hydroxyl radicals (*OH) and holes. The results supported that hole oxidation mainly governed the photodegradation process. As a common humic substance in natural water, humic acid accelerated the degradation of BPA when its concentration was 1mg/L, while the photodegradation was impeded with the increase of humic acid concentration in the range of 5-20mg/L. Almost all anions, including NO(3)(-), HCO(3)(-), Cl(-), SO(4)(2-) inhibited the degradation of BPA by Bi(2)WO(6) and their inhibition effects followed the order of SO(4)(2-)>Cl(-)>HCO(3)(-)>NO(3)(-). Cations of Na(+), K(+), Ca(2+) and Mg(2+) displayed slight suppressing effect on BPA degradation mainly due to the impact of Cl(-) coexisting in the solution. However, Cu(2+) hindered the BPA photodegradation heavily. Fe(3+) and H(2)O(2) affected the photodegradation in a complicated way: they suppressed or promoted the photodegradation depending on their concentrations. This could be the result of competition between photolyitc hole generated by Bi(2)WO(6) and OH produced by Fe(3+) or H(2)O(2.). SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/22176744/Photolytic_reaction_mechanism_and_impacts_of_coexisting_substances_on_photodegradation_of_bisphenol_A_by_Bi2WO6_in_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(11)00749-4 DB - PRIME DP - Unbound Medicine ER -