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Investigation on microwave absorbing properties of 3D C@ZnCo2O4 as a highly active heterogenous catalyst and the degradation of ciprofloxacin by activated persulfate process
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.seppur.2021.118330
Yu Gao , Shibo Cong , Haiyang Yu , Donglei Zou

This study investigated the degradation of ciprofloxacin (CIP) by activated persulfate with three-dimensional C@ZnCo2O4 (3D C@ZCO) under microwave irradiation. The 3D C@ZCO material was successfully prepared by a hydrothermal method. The morphology, microstructure, and microwave absorption properties were analysed by several characterization techniques. The effects of some influencing factors, such as the CIP concentration, persulfate dose, initial pH, 3D C@ZCO dose, and presence of organic matters and co-existing anions were researched in depth. The radical scavenger study document that SO4·−, ·OH, and ·O2 radicals are prominent in the 3D C@ZnCo2O4-activated persulfate under microwave irradiation process. Under the following conditions, [CIP]=10 mg/L, [3D C@ZCO]=1.5 g/L, [persulfate]=0.25 mM, [pH]0=6.5, microwave=600 W, and T=40℃, the removal of CIP reached 90%, and the total organic carbon removal ratio reached 73.14% after 40 min. Toxicity tests indicated the significance of exploring the toxicity of intermediate products. Several stable intermediate products were identified, and three degradation pathways were speculated for CIP degradation.



中文翻译:

3D C @ ZnCo2O4作为高活性多相催化剂的微波吸收性能及活化过硫酸盐法降解环丙沙星的研究

本研究研究了微波辐射下三维三维C @ ZnCo 2 O 4(3D C @ ZCO)活化过硫酸盐对环丙沙星(CIP)的降解作用。通过水热法成功制备了3D C @ ZCO材料。通过几种表征技术分析了形态,微观结构和微波吸收特性。深入研究了一些影响因素的影响,如CIP浓度,过硫酸盐剂量,初始pH值,3D C @ ZCO剂量以及有机物和共存阴离子的存在。自由基清除剂的研究文档SO 4 · -,·OH,·和ö 2 -基团是在3DÇ突出@碳酸锌2 ö 4微波辐照活化过硫酸盐。在以下条件下,[CIP] = 10 mg / L,[3D C @ ZCO] = 1.5 g / L,[过硫酸盐] = 0.25 mM,[pH] 0 = 6.5,微波= 600 W,T = 40℃ 40分钟后,CIP去除率达到90%,总有机碳去除率达到73.14%。毒性测试表明了探索中间产品毒性的重要性。鉴定了几种稳定的中间产物,并推测了三种降解途径用于CIP降解。

更新日期:2021-01-12
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