Synergistic effects of permanganate and chlorination on the degradation of Benzophenone-3: Kinetics, mechanisms and toxicity evaluation

被引:1
作者
Wu, Nannan [1 ]
Cao, Wanming [1 ]
Qu, Ruijuan [1 ]
Wang, Zunyao [1 ]
Allam, Ahmed A. [3 ]
Ajarem, Jamaan S. [4 ]
Altoom, Naif G. [4 ]
Dar, Afzal Ahmed [5 ]
Zhu, Feng [2 ]
Huo, Zongli [2 ]
机构
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resources Reuse, Nanjing 210023, Jiangsu, Peoples R China
[2] Jiangsu Prov Ctr Dis Control & Prevent, 172 Jiangsu Rd, Nanjing 210023, Jiangsu, Peoples R China
[3] Beni Suef Univ, Fac Sci, Zool Dept, Bani Suwayf, Egypt
[4] King Saud Univ, Coll Sci, Zool Dept, Riyadh, Saudi Arabia
[5] Polytech Montreal, Dept Phys, Montreal, PQ, Canada
基金
中国国家自然科学基金;
关键词
Permanganate; Sodium hypochlorite; Synergistic degradation; Reaction mechanisms; Environmental toxicity; UV-FILTERS; POTASSIUM-PERMANGANATE; WATER-TREATMENT; SURFACE-WATER; OXIDATION; PRODUCTS; REMOVAL; ACID; TRANSFORMATION; MANGANESE(II);
D O I
10.1016/j.seppur.2023.124194
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
To obtain utilization efficiency of low permanganate (KMnO4), it is available to combine with other chemical agents. This work found the synergistic effects of adding KMnO4 and sodium hypochlorite (NaClO) simulta-neously on the efficient degradation of benzophenone-3 (BP-3). The synergy factors of the combined method were increased with increasing concentrations of KMnO4 and NaClO. Neutral and alkaline conditions were more favorable for BP-3 removal. Methyl phenyl sulfoxide (PMSO) was used as the probe to detect high-valence Mn species (e.g., Mn(VI), Mn(V)). Results indicated that the reactivity of KMnO4 was improved by NaClO by increasing the content of high-valence Mn species. Cl- converted from NaClO was oxidized by KMnO4 to generate Cl2, also promoting the degradation of BP-3. The oxidative mechanisms of BP-3 in the system of KMnO4 coupling with NaClO (KMnO4/NaClO) mainly included oxidative ring-opening, carboxylation, Bayer-Villiger oxidation, electrophilic chlorination, hydroxylated reactions and cleavage, but oxidative ring-opening products were detected only in the combined system. Due to the reduced dosage of chlorine and the decreased toxicity in the combined process, KMnO4/NaClO decreased the environmental risk of the reaction process largely. Compre-hensively analyzing the degradation efficiency and environmental risk in treatment of BP-3 by the combined process, KMnO4/NaClO oxidation is a promising technology for water treatment.
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页数:11
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