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Degradation performance and mechanism of microcystins in aquaculture water using low-temperature plasma technology

文献类型： 外文期刊

作者： Wang, Jie 4 ; Zhang, Jiahua 1 ; Shangguan, Yuyi 3 ; Yang, Guanyi 4 ; Liu, Xingguo 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, 63 Chifeng Rd, Shanghai 200092, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Aquaculture Facil Engn, 63 Chifeng Rd, Shanghai 200092, Peoples R China

3.East China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, 500 Dongchuan Rd, Shanghai 200241, Peoples R China

4.Univ Shanghai Sci & Technol, Sch Environm & Architecture, 516 Jungong Rd, Shanghai 200093, Peoples R China

关键词： Plasma; Advancedoxidation processes; Microcystin-LR; Cytotoxicity; Algal blooms

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.9； 五年影响因子：9.5 ）

ISSN： 0269-7491

年卷期： 2024 年 347 卷

页码：

收录情况： SCI

摘要： The eutrophication of aquaculture water bodies seriously restricts the healthy development of the aquaculture industry. Among them, microcystins are particularly harmful. Therefore, the development of technologies for degrading microcystins is of great significance for maintaining the healthy development of the aquaculture industry. The feasibility and mechanism of removing microcystins-LR by dielectric barrier discharge (DBD) plasma were studied. DBD discharge power of 49.6 W and a treatment time of 40 min were selected as the more suitable DBD parameters, resulting in microcystin-LR removal efficiency of 90.4%. Meanwhile, the effects of initial microcystin-LR concentration, initial pH value, turbidity, anions on the degradation effect of microcystin-LR were investigated. The removal efficiency of microcystin-LR decreased with the increase of initial microcystin-LR concentration and turbidity. The degradation efficiency of microcystin-LR at pH 4.5 and 6.5 is significantly higher than that at pH 8.5 and 3.5. HCO3- can inhibit the removal efficiency of microcystin-LR. Furthermore, five intermediates products (m/z = 1029.5, 835.3, 829.3, 815.4, 642.1) were identified in this study, and the toxicity analysis of these degradation intermediates indicated that DBD treatment can reduce the toxicity of microcystin-LR. eaq, center dot OH, H2O2, and O-3 have been shown to play a major role in the degradation of microcystin-LR, and the contribution ranking of these active species is eaq > center dot OH > H2O2 > O-3. The application of DBD plasma technology in microcystin-LR removal and detoxification has certain development potential.

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