Efficient degradation, mineralization and toxicity reduction of sulfamethoxazole under photo-activation of peroxymonosulfate by ferrate (VI)
Efficient degradation, mineralization and toxicity reduction of sulfamethoxazole under photo-activation of peroxymonosulfate by ferrate (VI)
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高铁酸盐光活化过一硫酸盐对磺胺甲恶唑的高效降解、矿化和减毒 (VI)
DOI：
10.1016/j.cej.2020.124084
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发表时间：
2020-06
影响因子：
15.1
通讯作者：
Pu Shengyan
中科院分区：
文献类型：
--
作者：
Gong Han;Chu Wei;Xu Kaihang;Xia Xiongjian;Gong He;Tan Yan;Pu Shengyan
首次研究了高铁酸盐（Fe（VI））活化过一硫酸盐（PMS）光催化降解磺胺甲恶唑（SMX）。揭示了不同光源下试剂的作用以及试剂用量和溶液pH对SMX降解的影响。此外，还研究了一次性投加和分步投加不同处理工艺下SMX的降解、矿化、反应机理以及降解产物对卤虫的毒性。在最佳条件下，0.1 mM SMX可在8 min内完全去除。建立了描述两阶段反应的数学模型，计算了初始衰减速率和最大氧化容量。Fe（VI）在初始降解过程中起主导作用，SO 4自由基dot-和OH自由基dot-对后续降解起主导作用.与一次性投加相比，分步投加试剂减缓了SMX的降解，而分步引入Fe（VI）则提高了矿化效率。SMX的降解途径包括羟基化、羧基化、硝化等，经处理后，SMX溶液对卤虫摄食的不利影响有所减轻。本研究的结果表明，UVA/Fe（VI）/PMS在水相中处理抗生素方面具有良好的潜力。
The photodegradation of sulfamethoxazole (SMX) based on activation of peroxymonosulfate (PMS) with ferrate (VI) (Fe(VI)) was investigated for the first time. The role of the reagents under different light sources and the effects of reagent dosages as well as solution pH on the SMX degradation were revealed. Besides, the SMX degradation, mineralization, the reaction mechanism, and the toxicity of the degradation products toArtemia salinaunder various treatment processes with one-off or stepwise dosing of reagents were determined. SMX of 0.1 mM can be completely removed in 8 min under optimal conditions. A mathematic model was proposed to describe the two stage reactions, and the initial decay rate as well as the maximum oxidation capacity were calculated accordingly. Fe(VI) played a dominant role in initial degradation while radicals including SO4radical dot−and OHradical dotcontributed to continuous degradation. Compared to one-off dosing, stepwise addition of reagents slowed down SMX degradation, while stepwise introduction of Fe(VI) enhanced the mineralization efficiency. The proposed degradation pathways include hydroxylation, carboxylation, nitration and so on. The adverse effect of SMX solution to the feeding ofArtemia Salinawas abated after treatment. The results from this study demonstrate a good potential of using UVA/Fe(VI)/PMS in treatment of antibiotics in aqueous phase.
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影响因子：
13.6
作者：
Chen, Hui;Liu, Shan;Ying, Guang-Guo
通讯作者：
Ying, Guang-Guo
UV-TiO2-Fe(VI) 氧化水溶液中的磺胺类药物
影响因子：
--
作者：
Ma Y;Zhang K;Li C;Zhang T;Gao N
通讯作者：
Gao N
影响因子：
9.8
作者：
Isidori, M;Lavorgna, M;Parrella, A
通讯作者：
Parrella, A
影响因子：
8.8
作者：
V. Sharma;S. Mishra;A. Ray
通讯作者：
V. Sharma;S. Mishra;A. Ray
影响因子：
22.1
作者：
Y. Wang;W. Chu
通讯作者：
Y. Wang;W. Chu