高活性阳极制备及阿莫西林降解中的毒性效应

采用电流调控方式制备多催化位点的高效Ti/PbO2阳极,并对其形貌、晶型、电化学性能等进行表征,以常见抗生素阿莫西林(AMX)作为目标有机物,考察了阿莫西林在电催化降解中的毒性演变过程.结果表明,随沉积电流密度梯级升高,电极表层形貌由“四棱锥型”向“菜花状”转变,但晶相仍为β-PbO2,同时电极伏安电荷量提高,膜阻抗降...

Preparation of high active anode and its toxicity in amoxicillin degradation

A highly efficient Ti/PbO₂ anode with multi catalytic sites was prepared by current regulation, and its morphology, crystalline and electrochemical performance were characterized. Amoxicillin (AMX), a common antibiotic, was used as the target organic compound to investigate its toxicity evolution during the electrocatalytic degradation. Results showed that the surface morphology of electrode surface changed from "pyramid" to "cauliflower" with the increase of deposition current density, but the crystal phase was kept β-PbO₂. Meanwhile, the voltammetric capacity increased and the membrane impedance decreased for prepared anode. Toxicity test showed that AMX concentration in water was negatively correlated with the algae density of Scenedesmus obliquus, but it exhibited a "low concentration promotion, high concentration inhibition" effect on the chlorophyll synthesis. In addition, the optimized electrode exhibited a good degradation effect on AMX and the toxicity level of AMX increased first and then decreased during electrocatalytic degradation. The TELI_total value increased from 1.54 to 2.61, and then decreased to 1.63 after 150 minutes. The results of 110 kinds of gene stress showed that AMX had a significant effect on the oxidative stress and protein stress during electrocatalytic degradation.