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Photodegradation of bisphenol A in Fe(III)-oxalate complexes solution.
J Environ Sci (China). 2006; 18(4):771-6.JE

Abstract

The aqueous photodegradation of bisphenol A (BPA) in the presence of Fe(III)-oxalate complexes (Fe(III)-Ox), which are common compositions of natural water, was investigated in this study. BPA underwent rapid indirect photolysis in Fe(III)-Ox solution under simulated solar irradiation, proceeding pseudo-first-order kinetics. The photolysis rate increased with decreasing pH or initial BPA level and increasing Fe(III)/oxalate concentration ratio. Hydroxyl radicals (*OH), which were generated from the photochemical processes of Fe(III)-Ox complexes and contributed to the photooxidation of BPA, were determined by molecular probe and electron spin resonance (ESR) methods with the steady-state concentration of 2.56 x 10(-14) mol/L. Superoxide anion radical (O2*-) was considered as the precursor of *OH and qualitatively determined by adding nitro blue tetrazolium as well as ESR experiments. Based on the structural analysis of the intermediate photoproducts of BPA in Fe(III)-Ox complexes solution, the possible degradation pathways of BPA were proposed, involving *OH addition, alkyl scission and alky oxidation. The results indicate that the photochemical reactivity of Fe(III) may affect the environmental fate of BPA in natural water significantly.

Authors+Show Affiliations

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

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17078559

Citation

Zhan, Man-jun, et al. "Photodegradation of Bisphenol a in Fe(III)-oxalate Complexes Solution." Journal of Environmental Sciences (China), vol. 18, no. 4, 2006, pp. 771-6.
Zhan MJ, Yang X, Xian QM, et al. Photodegradation of bisphenol A in Fe(III)-oxalate complexes solution. J Environ Sci (China). 2006;18(4):771-6.
Zhan, M. J., Yang, X., Xian, Q. M., & Kong, L. R. (2006). Photodegradation of bisphenol A in Fe(III)-oxalate complexes solution. Journal of Environmental Sciences (China), 18(4), 771-6.
Zhan MJ, et al. Photodegradation of Bisphenol a in Fe(III)-oxalate Complexes Solution. J Environ Sci (China). 2006;18(4):771-6. PubMed PMID: 17078559.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photodegradation of bisphenol A in Fe(III)-oxalate complexes solution. AU - Zhan,Man-jun, AU - Yang,Xi, AU - Xian,Qi-ming, AU - Kong,Ling-ren, PY - 2006/11/3/pubmed PY - 2007/1/17/medline PY - 2006/11/3/entrez SP - 771 EP - 6 JF - Journal of environmental sciences (China) JO - J Environ Sci (China) VL - 18 IS - 4 N2 - The aqueous photodegradation of bisphenol A (BPA) in the presence of Fe(III)-oxalate complexes (Fe(III)-Ox), which are common compositions of natural water, was investigated in this study. BPA underwent rapid indirect photolysis in Fe(III)-Ox solution under simulated solar irradiation, proceeding pseudo-first-order kinetics. The photolysis rate increased with decreasing pH or initial BPA level and increasing Fe(III)/oxalate concentration ratio. Hydroxyl radicals (*OH), which were generated from the photochemical processes of Fe(III)-Ox complexes and contributed to the photooxidation of BPA, were determined by molecular probe and electron spin resonance (ESR) methods with the steady-state concentration of 2.56 x 10(-14) mol/L. Superoxide anion radical (O2*-) was considered as the precursor of *OH and qualitatively determined by adding nitro blue tetrazolium as well as ESR experiments. Based on the structural analysis of the intermediate photoproducts of BPA in Fe(III)-Ox complexes solution, the possible degradation pathways of BPA were proposed, involving *OH addition, alkyl scission and alky oxidation. The results indicate that the photochemical reactivity of Fe(III) may affect the environmental fate of BPA in natural water significantly. SN - 1001-0742 UR - https://www.unboundmedicine.com/medline/citation/17078559/Photodegradation_of_bisphenol_A_in_Fe_III__oxalate_complexes_solution_ DB - PRIME DP - Unbound Medicine ER -