以废治废:利用抗坏血酸强化 CaO2/Cu(II)系统从畜牧废水中去除抗生素和金属再利用的新方法。

Journal of hazardous materials Pub Date : 2024-10-05 Epub Date: 2024-08-23 DOI:10.1016/j.jhazmat.2024.135496
Rongfa Zhang, Song Xia, Wenyue Yu, Guanglan Di, Jifei Hou, Xuede Li, Mingbao Feng
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引用次数: 0

摘要

针对畜牧业废水中抗生素和 Cu(II)共存的问题,提出了一种通过原位利用 Cu(II)(即 CP/Cu(II) 和 CP/Cu(II)/ascorbic acid (AA) 系统)同时去除抗生素和 Cu 离子的新策略。CP/Cu(II)/AA 系统对氟苯尼考(FF)的去除率是 CP/Cu(II) 系统的 6.9 倍。CP/Cu(II)/AA 系统也能有效去除实际牲畜尾水中的抗生素。同时,CP/Cu(II) 和 CP/Cu(II)/AA 系统对铜离子的去除率分别达到 54.5% 和 15.7%。添加的 AA 能明显促进抗生素的降解,但抑制了铜离子的去除。CP/Cu(II)/AA体系中检测到了HO-、O2-、Cu(III)和-C-R,其中HO-被证实是FF降解的主要因素,Cu(III)和-C-R也参与了FF的消除。AA 的作用可加速 HO- 的产生和 Cu(I)/Cu(II)/Cu(III) 循环,并形成 -C-R。提出了 FF 在 CP/Cu(II)/AA 系统中的降解产物和途径,并通过毒性分析软件(T.E.S.T)对降解产物的毒性进行了评估。研究结果表明,在不引入复合催化剂的情况下,验证了原位利用畜禽废水中固有或人工引入的 Cu(II) 活化 CP 进行抗生素降解和 Cu 离子去除的可行性。
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Waste control by waste: A new approach for antibiotic removal and metal reuse from livestock wastewater using ascorbic acid-enhanced CaO2/Cu(II) system.

Aiming at the coexistence of antibiotics and Cu(II) in livestock wastewater, a novelty strategy for the simultaneous removal of antibiotics and Cu ions by in-situ utilization of Cu(II) (i.e., CP/Cu(II) and CP/Cu(II)/ascorbic acid (AA) systems) was proposed. The removal rate of florfenicol (FF) in the CP/Cu(II)/AA system was 6.9 times higher than that of the CP/Cu(II) system. CP/Cu(II)/AA system was also effective in removing antibiotics from real livestock tailwater. Simultaneously, the removal of Cu ions in CP/Cu(II) and CP/Cu(II)/AA systems could reach 54.5 % and 15.7 %, respectively. The added AA could significantly enhance the antibiotics degradation but inhibit the Cu ions removal. HO, O2•-, Cu(III), and C-R were detected in the CP/Cu(II)/AA system, in which HO was confirmed as the predominant contributor for FF degradation, and Cu(III) and C-R also participated in FF elimination. The role of AA could accelerate HO production and Cu(I)/Cu(II)/Cu(III) cycle, and form C-R. The degradation products and pathways of FF in the CP/Cu(II)/AA system were proposed and the toxicity of the degradation products was evaluated by the toxicity analysis software (T.E.S.T). The results of this work suggest that without introducing complex catalysts, the feasibility of in-situ utilization of Cu(II) inherently or artificially introduced in livestock wastewater activating CP for antibiotic degradation and Cu ions removal was verified.

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