CoFe2O4 nanoparticles anchored on waste eggshell for catalytic oxidation of florfenicol via activating peroxymonosulfate
CoFe2O4 nanoparticles anchored on waste eggshell for catalytic oxidation of florfenicol via activating peroxymonosulfate
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DOI：
10.1016/j.cclet.2021.11.096
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发表时间：
2021-12
影响因子：
9.1
通讯作者：
Yingjie Gao;Ying Han;Bingrui Liu;Jian-feng Gou;Dan Feng;Xiuwen Cheng
中科院分区：
文献类型：
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作者：
Yingjie Gao;Ying Han;Bingrui Liu;Jian-feng Gou;Dan Feng;Xiuwen Cheng
采用水热法制备了蛋壳负载型CoFe 2 O 4催化剂，并对复合材料的表面形貌和元素组成进行了系统的研究。以氟苯尼考（florfenicol，FF）为模型污染物，考察了CoFe 2 O 4/蛋壳活化PMS系统对FF的去除效果，考察了运行参数和水体基质对系统去除效果的影响。此外，通过EPR实验和自由基猝灭实验确定了FF降解的主要自由基，并提出了可能的降解机理。证实了FF降解过程中毒性的降低，并结合HP-LC测试，发现FF降解过程中有效地进行了脱卤和脱磷。此外，制备的CoFe 2 O 4聚偏氟乙烯（PVDF）膜有效地提高了材料的稳定性，减少了金属的析出。
Eggshell-loaded CoFe2O4catalyst was synthesizedviaa convenient hydrothermal method during our work, then the surface morphology and elemental composition of the composites were systematically investigated. Performance of CoFe2O4/eggshell-activated peroxymonosulfate (PMS) system was evaluated by selecting florfenicol (FF) as the model pollutant, and effects of operating parameters and water matrices on the FF removal efficiency in this system were investigated. In addition, main radicals involved in FF degradation were identified by EPR tests and radical quenching experiments, and possible mechanism was proposed. The reduction of toxicity during FF degradation was confirmed, and in combination with HP-LC tests, it was found that dehalogenation and defluorination were effectively carried out during FF degradation. In addition, the prepared CoFe2O4polyvinylidene fluoride (PVDF) membrane effectively improved the stability of the material and reduced the precipitation of metals.