摘要
采用UV/H_2O_2和UV/TiO_2两种工艺降解磺胺甲噁唑(SMX),确定了H_2O_2和TiO_2的最佳投加量,在保持最佳投加量的条件下研究了SMX初始浓度、反应溶液初始pH、叔丁醇投加量对两种方法降解SMX效果的影响,为研究两种方法在降解SMX过程中的矿化程度测定了TOC的去除情况。结果表明,两种方法都对SMX具有较好的去除效果,整体而言UV/H_2O_2对SMX的降解速率高于UV/TiO_2;UV/H_2O_2的降解速率更易受到SMX初始浓度、反应溶液初始pH的影响;UV/H_2O_2对SMX的降解过程中·OH的氧化作用和UV直接降解都是去除SMX的主要作用,而UV/TiO_2中UV直接降解和空穴直接氧化是去除SMX的主要作用。
In this study, water containing the pharmaceutical compound sulfamethoxazole（SMX） was subjected to UV/H_2O_2 and UV/TiO_2 processes, the optimum dosing amount of H_2O_2 and TiO_2 have been determined, investigate the effect of different initial SMX concentration, initial pH values and TBA dosage on the degradation of SMX in UV/H_2O_2 and UV/TiO_2 processes, the content of TOC was determined in order to study the degree of mineralization. The results indicated that SMX get degraded effectively in UV/H_2O_2 and UV/TiO_2 process. Compared with UV/TiO_2,the rate constants of SMX degradation by UV/H_2O_2 were higher, and more vulnerable to initial SMX concentration, different initial pH values and TBA dosage. Hydroxyl radicals oxidation and direct ultraviolet degradation play the key role in the degradation of SMX by UV/H_2O_2, in UV/TiO_2 process is direct ultraviolet degradation and positive holes oxidation.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第5期72-77,81,共7页
Technology of Water Treatment
基金
北京市属高等学校高层次人才引进与培养计划项目
城市雨水系统与水环境省部共建教育部重点实验室研究基金资助课题
