| 引用本文: | 林瑜航,邓志康,张亚楠,等.电化学原位生成的高铁物种体系去除养殖废水中的
磺胺甲恶唑效果研究[J].灌溉排水学报,2026,45(7):174-180. |
| Lin Yuhang,Deng Zhikang,Zhang Yanan,et al.电化学原位生成的高铁物种体系去除养殖废水中的
磺胺甲恶唑效果研究[J].灌溉排水学报,2026,45(7):174-180. |
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| 摘要: |
| 【目的】抗生素在养殖业中的滥用导致废水中药物残留超标，而传统处理工艺（如吸附法和活性污泥法）难以有效去除。本文以磺胺甲恶唑为目标污染物，构建了电化学原位生成高铁物种（E/Fe(III)）体系，研究其用于去除养殖废水中磺胺甲恶唑（SMX）效果。【方法】基于降解试验，研究了电极种类、缓冲液种类、缓冲液物质的量浓度、Fe3+初始物质的量浓度、pH值和电压对于E/Fe(III)体系降解SMX的影响。利用淬灭剂和捕获剂，对降解过程中起关键作用的活性氧物质进行鉴定，并对比在降解中的贡献差异。基于ECOSAR对降解产物的毒性预测结果，评估体系的解毒效果。最后，评估了E/Fe(III)在实际水体中的降解效果。【结果】①在0.1 mol/L物质的量浓度的硼酸盐缓冲液中，在15 V电压、25 μmol/L Fe3+、pH=9的条件下，能够在120 min内降解90.36%的初始质量浓度为10 mg/L的SMX。②除了高铁物种外，·OH、1O2和·O2-在降解污染物时均起到了一定作用，且1O2的贡献占比最大。③降解产物的预测毒性远低于SMX，在各种实际废水中均能保持良好的降解效果。【结论】E/Fe(III)体系被证明是从养殖废水中去除磺胺甲恶唑的环保和可持续技术。 |
| 关键词: 原位生成；高铁物种；活性氧；磺胺甲恶唑 |
| DOI：10.13522/j.cnki.ggps.2026045 |
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| Electrochemically generated ferric iron for efficient removal of sulfamethoxazole from aquaculture wastewater |
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Lin Yuhang, Deng Zhikang, Zhang Yanan, Zhang Zulin
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1. Xianghu Laboratory, Hangzhou 311231, China; 2. School of Environmental Science and Engineering,
Guilin University of Technology, Guilin 541000, China; 3. School of Resources and Environmental Engineering,
Wuhan University of Technology, Wuhan 430070, China; 4. The James Hutton Institute, Craigiebuckler, Aberdeen AB15 8QH, UK
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| Abstract: |
| 【Objective】The overuse of antibiotics in livestock industry has resulted in elevated antibiotic residues in aquaculture wastewater, which cannot be effectively removed by conventional treatments such as adsorption and activated sludge. This paper develops an in situ electrochemical ferric iron (E/Fe(III)) generation system to degrade sulfamethoxazole (SMX) in aquaculture wastewater.【Method】We experimentally investigated the effects of electrode type, buffer type, buffer concentration, initial Fe3+ concentration, pH, and voltage of the E/Fe(III) system on SMX degradation. Radical quenchers were used to identify reactive oxygen species involved in the degradation and quantify their relative contributions. The toxicity of degradation by-products and the system’s detoxification efficacy were predicted and evaluated using ECOSAR. We also evaluated the performance of the E/Fe(III) system for degrading SMX in real water bodies.【Result】In a 0.1 mol/L borate buffer solution with an initial SMX concentration of 10 mg/L, when voltage was 15 V, Fe3+ concentration was 25 μmol/L Fe3+ and pH = 9, the degradation rate of SMX reached 90.36% in 120 minutes. In addition to ferric species, ·OH, 1O2, and 1O2? all contributed to SMX degradation, with 1O2 contributing the most. Our results showed that the toxicity of the degradation by-products was significantly lower than that of SMX, and that stable degradation was achieved for various types of real wastewater.【Conclusion】The E/Fe(III) system is an environmentally friendly and sustainable technology for removing sulfamethoxazole in real aquaculture wastewaters. |
| Key words: in-situ generation; high-valent iron; reactive oxygen species; sulfamethoxazole |
