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Oxidative treatment of diclofenac via ferrate(VI) in aqueous media: effect of surfactant additives.
Water Sci Technol. 2017 Mar; 75(5-6):1342-1350.WS

Abstract

The potential reaction of diclofenac (DCF) with ferrate(VI) and influences of coexisting surfactants have not been investigated in depth, and are the focus of this study. The results demonstrated that DCF reacted effectively and rapidly with Fe(VI) and approximately 75% of DCF (0.03 mM) was removed by excess Fe(VI) (0.45 mM) within 10 min. All of the reactions followed pseudo first-order kinetics with respect to DCF and Fe(VI), where the apparent second-order rate constant (kapp) was 5.07 M-1 s-1 at pH 9.0. Furthermore, the degradation efficiencies of DCF were clearly dependent on the concentrations of dissolved organic matter additives in the substrate solution. Primarily, inhibitory effects were observed with the samples that contained anionic (sodium dodecyl-benzene sulfonate, SDBS) or non-ionic (Tween-80) surfactants, which have been attributed to the side reactions between Fe(VI) and surfactants, which led to a reduction in the available oxidant for DCF destruction. Furthermore, the addition of a cationic surfactant (cetyltrimethyl ammonium bromide, CTAB) and humic acid (HA) conveyed significantly promotional effects on the DCF-Fe(VI) reaction. The rate enhancement effect for CTAB might be due to micellar surface catalysis, through the Coulomb attraction between the reactants and positively charged surfactants, while the catalytic action for HA resulted from the additional oxidation of Fe(V)/Fe(IV) in the presence of HA. The results provided the basic knowledge required to understand the environmental relevance of DCF oxidation via Fe(VI) in the presence of surfactant additives.

Authors+Show Affiliations

Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China E-mail: wang2002yl@126.com; School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China.Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China E-mail: wang2002yl@126.com; School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China.Key Laboratory of Medical Molecular Probes, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang 453003, China E-mail: wang2002yl@126.com.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China.School of Environment, Henan Normal University, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huaihe River Water Environment and Pollution Control, Ministry of Education, Xinxiang 453007, China; Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.

Pub Type(s)

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

Language

eng

PubMed ID

28333050

Citation

Wang, Yingling, et al. "Oxidative Treatment of Diclofenac Via ferrate(VI) in Aqueous Media: Effect of Surfactant Additives." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 75, no. 5-6, 2017, pp. 1342-1350.
Wang Y, Ni T, Yuan J, et al. Oxidative treatment of diclofenac via ferrate(VI) in aqueous media: effect of surfactant additives. Water Sci Technol. 2017;75(5-6):1342-1350.
Wang, Y., Ni, T., Yuan, J., Wang, C., & Liu, G. (2017). Oxidative treatment of diclofenac via ferrate(VI) in aqueous media: effect of surfactant additives. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 75(5-6), 1342-1350. https://doi.org/10.2166/wst.2016.601
Wang Y, et al. Oxidative Treatment of Diclofenac Via ferrate(VI) in Aqueous Media: Effect of Surfactant Additives. Water Sci Technol. 2017;75(5-6):1342-1350. PubMed PMID: 28333050.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidative treatment of diclofenac via ferrate(VI) in aqueous media: effect of surfactant additives. AU - Wang,Yingling, AU - Ni,Tianjun, AU - Yuan,Jianmei, AU - Wang,Chunfeng, AU - Liu,Guoguang, PY - 2017/3/24/entrez PY - 2017/3/24/pubmed PY - 2017/11/3/medline SP - 1342 EP - 1350 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 75 IS - 5-6 N2 - The potential reaction of diclofenac (DCF) with ferrate(VI) and influences of coexisting surfactants have not been investigated in depth, and are the focus of this study. The results demonstrated that DCF reacted effectively and rapidly with Fe(VI) and approximately 75% of DCF (0.03 mM) was removed by excess Fe(VI) (0.45 mM) within 10 min. All of the reactions followed pseudo first-order kinetics with respect to DCF and Fe(VI), where the apparent second-order rate constant (kapp) was 5.07 M-1 s-1 at pH 9.0. Furthermore, the degradation efficiencies of DCF were clearly dependent on the concentrations of dissolved organic matter additives in the substrate solution. Primarily, inhibitory effects were observed with the samples that contained anionic (sodium dodecyl-benzene sulfonate, SDBS) or non-ionic (Tween-80) surfactants, which have been attributed to the side reactions between Fe(VI) and surfactants, which led to a reduction in the available oxidant for DCF destruction. Furthermore, the addition of a cationic surfactant (cetyltrimethyl ammonium bromide, CTAB) and humic acid (HA) conveyed significantly promotional effects on the DCF-Fe(VI) reaction. The rate enhancement effect for CTAB might be due to micellar surface catalysis, through the Coulomb attraction between the reactants and positively charged surfactants, while the catalytic action for HA resulted from the additional oxidation of Fe(V)/Fe(IV) in the presence of HA. The results provided the basic knowledge required to understand the environmental relevance of DCF oxidation via Fe(VI) in the presence of surfactant additives. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/28333050/Oxidative_treatment_of_diclofenac_via_ferrate_VI__in_aqueous_media:_effect_of_surfactant_additives_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2016.601 DB - PRIME DP - Unbound Medicine ER -