具备微电解特性的改性泡沫铜去除强力霉素

Removal of doxycycline by modified copper foam with micro electrolysis characteristics

通过改进的还原方法把纳米零价铁(nZVI)负载在多孔泡沫铜(CF)上,制备出具有微电解特性的泡沫铜材料(MCF),并利用SEM,SEMMAPPING和EDX对其表面的形态特征及其元素分布进行了表征.考察了不同去除方式,不同MCF投加量和不同强力霉素(DC)初始浓度对降解效果的影响.结果表明:负载等量nZVI的MCF处理效果明显优于nZVI;当DC初始浓度为50mg/L,MCF的投加量为4.0g,反应20min时,DC去除率可达到99%;动力学分析表明,MCF降解DC符合准一级反应动力学,且随着MCF的投加量增加,反应速率常数k增大,投加量为5.0g时,k值最大为0.0609min-1.

Modified foam copper(MCF)with micro-electrolytic properties was prepared in this study through an improved reduction method by loading nano-zero-valent iron(nZVI)on porous copper foam(CF).The surface morphology and element distribution of CF before and after nZVI loading were analyzed using SEM,SEMMAPPING and EDX.Besides,The study investigated the effects of removal methods,MCF dosages and initial DC concentrations on the degradation of DC with nZVI loading on MCF.The removal efficiency of DC using nZVI with MCF was much better than that without MCF.When DC concentration was 50mg/L,MCF dosage was 4.0g,and the reaction time was 20min,the removal efficiency of DC could reach as high as 99%.In addition,it was found that DC degradation with MCF fitted the pseudo-first-order reaction kinetics,and the reaction rate constant k became larger with the increase of MCF dosage.When the MCF dosage was 5.0g,the maximum k value was 0.0609min-1.Finally,the mechanism of DC degradation with MCF was explored based on all the results and it provided a certain theoretical basis for MCF practical application.