铜复合污染下四环素的光催化去除:产物路径及毒性分析

Photocatalytic Removal of Tetracycline Under Copper Composite Pollution:Product Pathway and Toxicity Analysis

水产养殖中投加抗生素和铜,可能造成养殖废水中的复合污染,破坏水生生态环境。由于铜离子(Cu)与抗生素四环素(TC)络合,在光照下会影响TC的光降解,其影响光降解产物和毒性等研究仍未被深入。因此,该文使用碳氮包覆纳米Fe_(3)O_(4)光催化降解TC和Cu复合污染物,研究其降解产物和产物毒性。结果表明在Cu的架桥作用下,TC去除率提升至58.1%,TC的产物数量明显减少,多为小分子有机物,且产物毒性显著降低,有效降低了复合污染的危害。

Adding antibiotics and copper to aquaculture may cause compound pollution in aquaculture wastewater,damaging the aquatic ecological environment.Due to the complexation of copper ions(Cu)with the antibiotic tetracycline(TC),it can affect the photodegradation of TC under light,and its impact on photodegradation products and toxicity has not been thoroughly studied.Therefore,this article uses carbon nitrogen coated nano Fe_(3)O_(4)photocatalysis to degrade TC and Cu composite pollutants,and studies their degradation products and product toxicity.The results showed that under the bridging effect of Cu,the removal rate of TC increased to 58.1%,the amount of TC products significantly decreased,mostly small molecule organic compounds,and the toxicity of the products was significantly reduced,effectively reducing the harm of composite pollution.