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Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances.
Chemosphere. 2006 Apr; 63(3):378-86.C

Abstract

The photodegradation of endocrine disrupter bisphenol A (BPA) in the presence of natural humic substances (HS) under simulated solar irradiation was studied. BPA underwent slow direct photolysis in neutral pure water, but rapid photosensitized degradation in four kinds of HS, following pseudo-first-order reaction. Reactive oxygen species (ROS) formed from HS were determined, including OH, (1)O(2) and H(2)O(2). The enhancement of BPA degradation by adding Fe(III) was primarily attributed to the oxidation of OH produced from photo-Fenton-like reaction. And the joint effects of HS and nitrate ions coexisting on BPA degradation appeared to depend on respective concentration levels. The effects of dissolved oxygen suggested that the energy transfer between excited state of SRFA and NOFA likely occurred, while the abstraction of phenolic hydrogen atom to reactive triplet state of NOHA possibly took place. Based on the structural analyses of main intermediates and degradation products of BPA detected by GC-MS, the possible photodegradation pathways were proposed, involving the alky cleavage, alkyl oxidation and OH addition. This study gave a better understanding for the photochemical transformation of BPA induced by ROS generated from natural water composition under sunlight irradiation.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, PR China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16289215

Citation

Zhan, Manjun, et al. "Photosensitized Degradation of Bisphenol a Involving Reactive Oxygen Species in the Presence of Humic Substances." Chemosphere, vol. 63, no. 3, 2006, pp. 378-86.
Zhan M, Yang X, Xian Q, et al. Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances. Chemosphere. 2006;63(3):378-86.
Zhan, M., Yang, X., Xian, Q., & Kong, L. (2006). Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances. Chemosphere, 63(3), 378-86.
Zhan M, et al. Photosensitized Degradation of Bisphenol a Involving Reactive Oxygen Species in the Presence of Humic Substances. Chemosphere. 2006;63(3):378-86. PubMed PMID: 16289215.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photosensitized degradation of bisphenol A involving reactive oxygen species in the presence of humic substances. AU - Zhan,Manjun, AU - Yang,Xi, AU - Xian,Qiming, AU - Kong,Lingren, Y1 - 2005/11/09/ PY - 2005/03/25/received PY - 2005/08/29/revised PY - 2005/08/30/accepted PY - 2005/11/18/pubmed PY - 2006/7/1/medline PY - 2005/11/18/entrez SP - 378 EP - 86 JF - Chemosphere JO - Chemosphere VL - 63 IS - 3 N2 - The photodegradation of endocrine disrupter bisphenol A (BPA) in the presence of natural humic substances (HS) under simulated solar irradiation was studied. BPA underwent slow direct photolysis in neutral pure water, but rapid photosensitized degradation in four kinds of HS, following pseudo-first-order reaction. Reactive oxygen species (ROS) formed from HS were determined, including OH, (1)O(2) and H(2)O(2). The enhancement of BPA degradation by adding Fe(III) was primarily attributed to the oxidation of OH produced from photo-Fenton-like reaction. And the joint effects of HS and nitrate ions coexisting on BPA degradation appeared to depend on respective concentration levels. The effects of dissolved oxygen suggested that the energy transfer between excited state of SRFA and NOFA likely occurred, while the abstraction of phenolic hydrogen atom to reactive triplet state of NOHA possibly took place. Based on the structural analyses of main intermediates and degradation products of BPA detected by GC-MS, the possible photodegradation pathways were proposed, involving the alky cleavage, alkyl oxidation and OH addition. This study gave a better understanding for the photochemical transformation of BPA induced by ROS generated from natural water composition under sunlight irradiation. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/16289215/Photosensitized_degradation_of_bisphenol_A_involving_reactive_oxygen_species_in_the_presence_of_humic_substances_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(05)01107-0 DB - PRIME DP - Unbound Medicine ER -