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Oxidation of benzophenone-3 during water treatment with ferrate(VI).
Water Res. 2013 May 01; 47(7):2458-66.WR

Abstract

Benzophenone-3 (BP-3), a sunscreen agent widely used in many cosmetic products, has been found to have a wide presence in aquatic environments, which could affect the water quality and human health. We investigated oxidation of BP-3 by aqueous ferrate(VI) (Fe(VI)) to determine reaction kinetics, identify the reaction products, and evaluate the removal efficiency of BP-3 during water treatment with Fe(VI). The obtained apparent second-order rate constant (kapp) for Fe(VI) oxidation of BP-3was 81.8 M(-1) s(-1) at pH 8.0 and 24 ± 1 °C with the half-life (t1/2) of 167.8 s for BP-3 at an Fe(VI) concentration of 10 mg L(-1). The kapp of the reaction decreased with increasing pH values. Species-specific rate constants (k) for the reaction of HFeO4(-) with each of BP-3's acid-base species were used to model these pH-dependent variations of kapp. The value of k determined for neutral BP-3 was 3.4(±0.5) × 10(2) M(-1) s(-1), while that measured for dissociated BP-3 was 8.5(±0.7) × 10(3) M(-1) s(-1). The reaction between HFeO4(-) and the dissociated BP-3 controls the overall reaction. 4-Methoxybenzophenone and 4-methoxybenzoyl cation were formed during Fe(VI) degradation of BP-3. The removal efficiency of BP-3 by Fe(VI) treatment was dependent on coexisting constituents present in source water. Humic acids, Mn(2+) and NaCl significantly decreased the removal efficiency of BP-3, while Br(-) and Cu(2+) enhanced the removal. Besides, NH4(+), NO3(-), Fe(3+) and Fe(2+) had no effects on BP-3 removal within the tested concentrations. The results showed that Fe(VI) treatment technology appears to be a promising tool for the removal of hydroxylated benzophenone derivatives in water.

Authors+Show Affiliations

State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.No affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

23481287

Citation

Yang, Bin, and Guang-Guo Ying. "Oxidation of Benzophenone-3 During Water Treatment With Ferrate(VI)." Water Research, vol. 47, no. 7, 2013, pp. 2458-66.
Yang B, Ying GG. Oxidation of benzophenone-3 during water treatment with ferrate(VI). Water Res. 2013;47(7):2458-66.
Yang, B., & Ying, G. G. (2013). Oxidation of benzophenone-3 during water treatment with ferrate(VI). Water Research, 47(7), 2458-66. https://doi.org/10.1016/j.watres.2013.02.018
Yang B, Ying GG. Oxidation of Benzophenone-3 During Water Treatment With Ferrate(VI). Water Res. 2013 May 1;47(7):2458-66. PubMed PMID: 23481287.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidation of benzophenone-3 during water treatment with ferrate(VI). AU - Yang,Bin, AU - Ying,Guang-Guo, Y1 - 2013/02/19/ PY - 2012/09/18/received PY - 2013/02/05/revised PY - 2013/02/08/accepted PY - 2013/3/14/entrez PY - 2013/3/14/pubmed PY - 2013/9/14/medline SP - 2458 EP - 66 JF - Water research JO - Water Res VL - 47 IS - 7 N2 - Benzophenone-3 (BP-3), a sunscreen agent widely used in many cosmetic products, has been found to have a wide presence in aquatic environments, which could affect the water quality and human health. We investigated oxidation of BP-3 by aqueous ferrate(VI) (Fe(VI)) to determine reaction kinetics, identify the reaction products, and evaluate the removal efficiency of BP-3 during water treatment with Fe(VI). The obtained apparent second-order rate constant (kapp) for Fe(VI) oxidation of BP-3was 81.8 M(-1) s(-1) at pH 8.0 and 24 ± 1 °C with the half-life (t1/2) of 167.8 s for BP-3 at an Fe(VI) concentration of 10 mg L(-1). The kapp of the reaction decreased with increasing pH values. Species-specific rate constants (k) for the reaction of HFeO4(-) with each of BP-3's acid-base species were used to model these pH-dependent variations of kapp. The value of k determined for neutral BP-3 was 3.4(±0.5) × 10(2) M(-1) s(-1), while that measured for dissociated BP-3 was 8.5(±0.7) × 10(3) M(-1) s(-1). The reaction between HFeO4(-) and the dissociated BP-3 controls the overall reaction. 4-Methoxybenzophenone and 4-methoxybenzoyl cation were formed during Fe(VI) degradation of BP-3. The removal efficiency of BP-3 by Fe(VI) treatment was dependent on coexisting constituents present in source water. Humic acids, Mn(2+) and NaCl significantly decreased the removal efficiency of BP-3, while Br(-) and Cu(2+) enhanced the removal. Besides, NH4(+), NO3(-), Fe(3+) and Fe(2+) had no effects on BP-3 removal within the tested concentrations. The results showed that Fe(VI) treatment technology appears to be a promising tool for the removal of hydroxylated benzophenone derivatives in water. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/23481287/Oxidation_of_benzophenone_3_during_water_treatment_with_ferrate_VI__ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(13)00111-5 DB - PRIME DP - Unbound Medicine ER -