以磺胺甲噁唑(SMX)为研究对象,探究电化学同步产生臭氧体系降解抗生素废水的效能及其降解机理。选取电流强度、硫酸盐质量分数、初始pH为自变量,以SMX的降解率为响应值,通过Box-Behnken设计方法进行试验方案设计。采用响应面分析法对试验结果进行模拟及分析,研究各因素及其交互作用对SMX降解率的影响。结果表明,在电流为4.3 A、硫酸盐质量分数为0.27 %、pH为5.59时,运行30 min的SMX降解率最高为99.705 %;体系中主要的活性物质包含臭氧、单线态氧、羟基和超氧自由基,其中臭氧和羟基自由基起主要作用。

Sulfamethoxazole (SMX),an antibiotic,is taken as the test object to explore the efficiency of electrochemical synchronous ozone-generating system for degradation of antibiotics-containing wastewater and the degradation mechanism.Current intensity,sulfates content,and initial pH are selected as independent variables,and the degradation rate of SMX is determined by the Box-Behnken design method.Response surface analysis is employed to simulate and analyze the effect of each factor and their interaction on the degradation rate of SMX.The results show that the highest degradation rate of SMX is 99.705 % within 30 min when the current intensity is 4.3 A,the content of sulfates is 0.27 %,and pH is 5.59.The mechanism analysis shows that the main active substances in the system include O₃,¹O₂,·OH and·O^-₂,among which O₃ and·OH play major roles.

晏语(1999-),男,硕士生,主要从事电解臭氧催化氧化研究,yyljx1999@163.com