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Photooxidation of bisphenol A (BPA) in water in the presence of ferric and carboxylate salts.
Water Res. 2004 Nov; 38(19):4107-16.WR

Abstract

In this work, the photooxidation of bisphenol A (BPA), a suspected endocrine disruptor (ED), in water in the presence of ferric and oxalate ions was investigated in a concentric reactor under a 125 W high-pressure mercury lamp (lambda> or = 365 nm). The photooxidation efficiencies were dependent on the pH values and ferric/oxalate concentration ratios (Fe(III)/Ox) in the water, with higher efficiency at pH 3.50+/-0.05 and Fe(III)/Ox 10.0/120.0 micromol l(-1). The initial rate of photooxidation increases with increasing the initial concentration of BPA from 2.0 to 5.0 mg l(-1) while do not change at 5.0 and 10.0 mg l(-1). However, higher removal efficiency of BPA is archived at lower BPA initial concentration over range of 2.0 to 10.0 mg l(-1). For 2.0 mg l(-1) BPA, the initial rate of photooxidation is 0.06 mg l(-1)min(-1). By using UV-Vis spectrum and LC-MS techniques, the predominant photooxidation product BPA-o-catechol was identified and the mechanisms for the oxidative degradation were proposed. When BPA reacted with OH radicals, C atoms in 3-position were added with OH radicals followed by O2 peroxidation and HO2 radical escape. Then catechol derivatives were produced. After that, the two H atoms on the hydroxy group were extracted in two individual steps to form intermediates semiquinone radical and o-quinone. The intermediates underwent further oxidation, benzene ring cleavage and decarboxylation, up to mineralization ultimately.

Authors+Show Affiliations

College of Material Science and Chemical Engineering, China University of Geosciences, Wuhan 430074, PR China. zdncug@163.comNo 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

15491658

Citation

Zhou, Danna, et al. "Photooxidation of Bisphenol a (BPA) in Water in the Presence of Ferric and Carboxylate Salts." Water Research, vol. 38, no. 19, 2004, pp. 4107-16.
Zhou D, Wu F, Deng N, et al. Photooxidation of bisphenol A (BPA) in water in the presence of ferric and carboxylate salts. Water Res. 2004;38(19):4107-16.
Zhou, D., Wu, F., Deng, N., & Xiang, W. (2004). Photooxidation of bisphenol A (BPA) in water in the presence of ferric and carboxylate salts. Water Research, 38(19), 4107-16.
Zhou D, et al. Photooxidation of Bisphenol a (BPA) in Water in the Presence of Ferric and Carboxylate Salts. Water Res. 2004;38(19):4107-16. PubMed PMID: 15491658.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photooxidation of bisphenol A (BPA) in water in the presence of ferric and carboxylate salts. AU - Zhou,Danna, AU - Wu,Feng, AU - Deng,Nansheng, AU - Xiang,Wu, PY - 2004/03/23/received PY - 2004/07/12/revised PY - 2004/07/29/accepted PY - 2004/10/20/pubmed PY - 2005/2/16/medline PY - 2004/10/20/entrez SP - 4107 EP - 16 JF - Water research JO - Water Res VL - 38 IS - 19 N2 - In this work, the photooxidation of bisphenol A (BPA), a suspected endocrine disruptor (ED), in water in the presence of ferric and oxalate ions was investigated in a concentric reactor under a 125 W high-pressure mercury lamp (lambda> or = 365 nm). The photooxidation efficiencies were dependent on the pH values and ferric/oxalate concentration ratios (Fe(III)/Ox) in the water, with higher efficiency at pH 3.50+/-0.05 and Fe(III)/Ox 10.0/120.0 micromol l(-1). The initial rate of photooxidation increases with increasing the initial concentration of BPA from 2.0 to 5.0 mg l(-1) while do not change at 5.0 and 10.0 mg l(-1). However, higher removal efficiency of BPA is archived at lower BPA initial concentration over range of 2.0 to 10.0 mg l(-1). For 2.0 mg l(-1) BPA, the initial rate of photooxidation is 0.06 mg l(-1)min(-1). By using UV-Vis spectrum and LC-MS techniques, the predominant photooxidation product BPA-o-catechol was identified and the mechanisms for the oxidative degradation were proposed. When BPA reacted with OH radicals, C atoms in 3-position were added with OH radicals followed by O2 peroxidation and HO2 radical escape. Then catechol derivatives were produced. After that, the two H atoms on the hydroxy group were extracted in two individual steps to form intermediates semiquinone radical and o-quinone. The intermediates underwent further oxidation, benzene ring cleavage and decarboxylation, up to mineralization ultimately. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/15491658/Photooxidation_of_bisphenol_A__BPA__in_water_in_the_presence_of_ferric_and_carboxylate_salts_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(04)00387-2 DB - PRIME DP - Unbound Medicine ER -