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Efficient degradation of sulfamethoxazole by the Fe(II)/HSO5- process enhanced by hydroxylamine: Efficiency and mechanism.
J Hazard Mater. 2017 Jan 15; 322(Pt B):461-468.JH

Abstract

Fenton or Fenton-like processes have been regarded as feasible methods to degrade a wide variety of contaminants by generating reactive species, but the efficiency is still challenged by the slow transformation from Fe(III) to Fe(II) and pH. This study employed hydroxylamine (HA) to improve the oxidation efficiency of Fe(II)/HSO5- (Fe(II)/PMS) process, by selecting sulfamethoxazole (SMX) as the target compound. The degradation efficiency and mechanism of SMX by the HA/Fe(II)/PMS process were elucidated for the first time. Compared with Fe(II)/PMS process, the HA/Fe(II)/PMS process showed about 4 times higher degradation efficiency of SMX at pH 3.0. The analysis of steady-state concentration of Fe species indicated that HA enhanced the transformation of Fe(III) to Fe(II), sustaining the rapid Fenton-like reactions. Both sulfate radicals and hydroxyl radicals accounted for the degradation of SMX, with the latter regarded as the dominant reactive species. Degradation intermediates of SMX were further analyzed, and three main transformation pathways were thus proposed. The HA/Fe(II)/PMS process was also effective in the removal of SMX and total organic carbon from real pharmaceutical wastewater. This work would broaden the scope of application of Fenton and Fenton-like processes enhanced by HA in contaminants treatment.

Authors+Show Affiliations

College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China; Department of Civil, Engineering and Geomatic Engineering, University College London (UCL), London, WC1E 6BT, UK. Electronic address: liuguifang@126.com.School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, 310018, China. Electronic address: xcli@zjgsu.edu.cn.School of Civil Engineering, Heilongjiang University, Harbin, 150080, China; National Engineering Research Center of Urban Water Resources, Harbin, 150090, China.College of Biology and the Environment, Nanjing Forestry University, Nanjing, 210037, China.College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin, 150001, China.Department of Civil, Engineering and Geomatic Engineering, University College London (UCL), London, WC1E 6BT, UK.

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

27745962

Citation

Liu, Guifang, et al. "Efficient Degradation of Sulfamethoxazole By the Fe(II)/HSO5- Process Enhanced By Hydroxylamine: Efficiency and Mechanism." Journal of Hazardous Materials, vol. 322, no. Pt B, 2017, pp. 461-468.
Liu G, Li X, Han B, et al. Efficient degradation of sulfamethoxazole by the Fe(II)/HSO5- process enhanced by hydroxylamine: Efficiency and mechanism. J Hazard Mater. 2017;322(Pt B):461-468.
Liu, G., Li, X., Han, B., Chen, L., Zhu, L., & Campos, L. C. (2017). Efficient degradation of sulfamethoxazole by the Fe(II)/HSO5- process enhanced by hydroxylamine: Efficiency and mechanism. Journal of Hazardous Materials, 322(Pt B), 461-468. https://doi.org/10.1016/j.jhazmat.2016.09.062
Liu G, et al. Efficient Degradation of Sulfamethoxazole By the Fe(II)/HSO5- Process Enhanced By Hydroxylamine: Efficiency and Mechanism. J Hazard Mater. 2017 Jan 15;322(Pt B):461-468. PubMed PMID: 27745962.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient degradation of sulfamethoxazole by the Fe(II)/HSO5- process enhanced by hydroxylamine: Efficiency and mechanism. AU - Liu,Guifang, AU - Li,Xuchun, AU - Han,Bangjun, AU - Chen,Liwei, AU - Zhu,Linan, AU - Campos,Luiza C, Y1 - 2016/09/28/ PY - 2016/08/01/received PY - 2016/09/25/revised PY - 2016/09/26/accepted PY - 2016/10/18/pubmed PY - 2018/9/1/medline PY - 2016/10/18/entrez KW - Hydroxyl radical KW - Hydroxylamine KW - Peroxomonosulfate KW - Sulfamethoxazole KW - Sulfate radical SP - 461 EP - 468 JF - Journal of hazardous materials JO - J. Hazard. Mater. VL - 322 IS - Pt B N2 - Fenton or Fenton-like processes have been regarded as feasible methods to degrade a wide variety of contaminants by generating reactive species, but the efficiency is still challenged by the slow transformation from Fe(III) to Fe(II) and pH. This study employed hydroxylamine (HA) to improve the oxidation efficiency of Fe(II)/HSO5- (Fe(II)/PMS) process, by selecting sulfamethoxazole (SMX) as the target compound. The degradation efficiency and mechanism of SMX by the HA/Fe(II)/PMS process were elucidated for the first time. Compared with Fe(II)/PMS process, the HA/Fe(II)/PMS process showed about 4 times higher degradation efficiency of SMX at pH 3.0. The analysis of steady-state concentration of Fe species indicated that HA enhanced the transformation of Fe(III) to Fe(II), sustaining the rapid Fenton-like reactions. Both sulfate radicals and hydroxyl radicals accounted for the degradation of SMX, with the latter regarded as the dominant reactive species. Degradation intermediates of SMX were further analyzed, and three main transformation pathways were thus proposed. The HA/Fe(II)/PMS process was also effective in the removal of SMX and total organic carbon from real pharmaceutical wastewater. This work would broaden the scope of application of Fenton and Fenton-like processes enhanced by HA in contaminants treatment. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/27745962/Efficient_degradation_of_sulfamethoxazole_by_the_Fe_II_/HSO5__process_enhanced_by_hydroxylamine:_Efficiency_and_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(16)30884-6 DB - PRIME DP - Unbound Medicine ER -
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