摘要
文章制备Al/Zn共掺杂Ti电极(Al/Zn-Ti电极)并利用其对盐酸丁卡因进行电化学氧化处理并考察降解过程的影响因素及探讨反应机理。结果表明Al/Zn-Ti电极电化学氧化盐酸丁卡因受初始浓度、电流密度及电解质浓度影响,而初始p H对降解不起作用。在盐酸丁卡因的初始浓度为50 mg/L,电流密度为30 m A/cm2,电解质浓度为0.1 mol/L时,Al/Zn-Ti电极的电化学降解效果最优,120 min反应后,COD去除率可以达到68%。对其中间产物分析得出,产生的·OH首先进攻盐酸丁卡因苯环上的基团使其开键断裂。
In the study, Ti electrode codoped with Al and Zn（Al/Zn-Ti electrode） has been synthesized, electrochemical oxidation technology to deal with tetracaine hydrochloride using Al/Zn-Ti electrode has been investigated, the influence of operating variables on the degradation efficiency was studied, as well as the reaction mechanism has been proposed. The results showed that the initial concentration of tetracaine hydrochloride, the current density, and the electrolyte concentration affected obviously the electrochemical removal of tetracaine hydrochloride via Al/Zn-Ti electrode, while no significant effect of the initial p H on the tetracaine hydrochloride degradation was observed. 50 mg/L of the initial tetracaine hydrochloride concentration, 30 m A/cm^2 of the current density, and 0.1 mol/L of the electrolyte concentration were the optimal experimental parameter. At this condition, after 120 min reaction, 68 % of COD could be removed. As far as the intermediates of tetracaine hydrochloride degradation were concerned, the groups attached with benzene ring in tetracaine hydrochloride were attacked to cleave by ·OH.
出处
《广东化工》
CAS
2015年第13期83-85,82,共4页
Guangdong Chemical Industry
基金
浙江省博士后择优项目资助
