光-电双室反应器耦合处理养殖废水尾水抗生素重金属复合污染研究

It has been challenging for the purification technologies to effectively remove the low-concentrated combined pollutants of antibiotics and heavy metals in the effluent after biological treatment of livestock wastewater. Low concentration, strong interference and easily forming stubborn complexes are the main technical bottleneck of the removing process. In this research, the tetracycline and copper ions are selected as the representative of antibiotics and heavy metal ions and a double chamber reactor was built for advanced treatment of combined pollutants of antibiotics and heavy metals. The Bi(Y)Xn/MoX2 heteromaterials were firstly synthesized as the visible- light absorbed photoelectrocatalytic anode catalysis for “organic concentration- catalytic degradation”, while the graphene foam materials were prepared as the cathode materials for electrochemical enhanced adsorption of heavy metal ions in the effluent of anode chamber. This project further studied on the electrode catalytic mechanism, analyzed the degradation mechanism of antibiotics and adsorption mechanism of heavy metal ions. Based on these results, we goal-directed tuned the parameters of double chamber coupling reactor and optimized the electrode materials, so that to completely remove the combined pollutants of antibiotics and heavy metals in water. This work will be of remarkable theoretical significance and practical values in providing a new strategy of advanced treatment of antibiotics and heavy metals and giving useful information for the treatment of other types of low-concentrated combined pollutants.

畜禽养殖废水经传统处理工艺后尾水中的抗生素和重金属复合污染存在浓度低、相互干扰及易形成难降解络合物的去除难点。本项目拟以养殖废水尾水中具有代表性的污染物四环素和铜离子为研究对象，基于分步处理思路构建阳极降解-阴极吸附光电双室反应器，依托于有高富集能力的Bi(Y)Xn/MoX2可见光阳极材料和高导电性和物理吸附性的石墨烯泡沫阴极材料的制备优化，实现阳极室低浓度抗生素和重金属复合污染体系中有机物的“富集-催化降解”和阳极室处理后出水中重金属离子在阴极室的电强化吸附分离。本项目将深入研究耦合系统中电极催化机理和能量转移机制，阐明抗生素的光电催化降解机理和重金属吸附机制，在此基础上优化电极材料合成和双室反应器运行参数，最终实现养殖废水尾水中抗生素的降解矿化和重金属离子的分离。本项目的研究不仅为抗生素和重金属复合污染深度处理提供新技术，也为其他类型低浓度复合污染深度处理提供了科学依据。

畜禽养殖废水经传统处理工艺后尾水中的抗生素和重金属复合污染存在浓度低、相互干扰及易形成难降解络合物的去除难点。本项目以养殖废水尾水中具有代表性的污染物四环素(TC)和铜、铬离子为研究对象，基于分步处理思路构建阳极降解-阴极吸附双室反应器 ，依托于有高富集能力的阳极材料和高导电性和物理吸附性的石墨烯泡沫阴极材料的制备优化，创新性构建了阳极电催化-过硫酸盐活化(EASR)双室电催化耦合体系并用于TC和Cr(VI)复合污染物的去除，明晰了耦合系统中电极催化机理和能量转移机制，阐明了四环素的耦合降解机理和重金属吸附机制。成功实现阳极室低浓度抗生素和重金属复合污染体系中有机物的“ 富集-催化降解”和阳极室处理后出水中重金属离子在阴极室的电强化吸附分离。本项目不仅为抗生素和重金属复合污染深度处理提供新技术，也为其他类型低浓度复合污染深度处理提供了科学依据。

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