模拟太阳光下高碘酸钠/TiO_(2)协同降解水体抗生素  

Synergetic degradation of antibiotics in water by periodate/TiO_(2) understimulated solar irradiation

作　　者：黄玉月 王达 刘硕 韩松 解清杰 王慧娟 HUANG Yuyue;WANG Da;LIU Shuo;HAN Song;XIE Qingjie;WANG Huijuan(School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学环境与安全工程学院,镇江212013

出　　处：《环境工程学报》2024年第6期1499-1509,共11页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21876070);西藏自治区科学计划项目(XZ202301ZY0002N)。

摘　　要：为了拓宽抗生素废水高效降解的方法,研究采用氙灯作为模拟太阳光源(Simulated sunlight,SS)活化高碘酸盐(Periodate,PI),建立用于抗生素降解的水处理体系,并通过在其中引入TiO_(2)(PI/TiO_(2)/SS),提升作用效果。研究首先以磺胺嘧啶(sulfadiazine,SDZ)为代表,分析了PI/TiO_(2)/SS系统中影响其降解的关键参数,包括TiO_(2)含量、PI含量、SDZ质量浓度和溶液初始pH等。结果表明,在0.3 mmol·L^(-1)PI和0.05 g·L^(-1)TiO_(2)的条件下,处理30 min后SDZ的去除率可达95.13%,且PI含量越高、TiO_(2)用量越大以及SDZ初始质量浓度越低时,降解率越高;在较宽的溶液pH范围内,PI/TiO_(2)/SS体系均能实现SDZ的高效降解;反应过程中SDZ溶液的UV-Vis光谱和COD去除分析结果证明了PI/TiO_(2)/SS体系协同作用。通过溶液中H_(2)O_(2)质量浓度的测定以及淬灭剂实验揭示了PI/TiO_(2)/SS体系中O_(2)^(-)>IO_(3)和OH>h^(+)对SDZ的降解作用。此外,对比考察了TiO_(2)添加前后甲氧苄啶(Trimethoprim,TMP)、环丙沙星(Ciprofloxacin,CIP)和恩诺沙星(Enrofloxacin,EFA)溶液降解效果的变化,在一定程度上证明了PI/TiO_(2)/SS体系针对抗生素废水处理的普适性。In order to broaden the efficient degradation method of antibiotics in wastewater,the xenon lamp was used as the simulated sunlight(SS)source to activate the periodate(PI),and the water treatment system for antibiotics degradation was set up accordingly.The TiO_(2) was introduced to the system to improve the degradation effect.At first,sulfadiazine(SDZ)was taken as a representative,the key parameters in PI/TiO_(2)/SS system affecting SDZ degradation were analyzed,which included TiO_(2) content,PI content,SDZ concentration and initial pH values of the solutions.The results showed that the SDZ degradation rate could reach 95.13%after 30 min treatment at 0.3 mmol·L^(−1) PI and 0.05 g·L^(−1) TiO_(2).The higher PI content,the higher TiO_(2) dosage,and the lower the SDZ concentration,the higher the degradation rate.The efficient degradation of SDZ in the PI/TiO_(2)/SS system could be achieved in a wide range of solution pH.The UV-Vis spectra and COD removal analysis of SDZ solution during the reaction process proved the synergetic degradation effect of PI/TiO_(2)/SS system.The action rule of·O_(2)^(-)>IO_(3)·and·OH>h^(+)in the PI/TiO_(2)/SS system for the SDZ degradation was revealed through the experiments of the H_(2)O_(2) concentration detection and quenching experiments.In addition,the study investigated and compared the degradation of trimethoprene(TMP),ciprofloxacin(CIP)and enrofloxacin(EFA)solutions before and after TiO_(2) addition,which proved the universality of PI/TiO_(2)/SS system for the treatment of antibiotic wastewater to some extent.

关 键 词：模拟太阳光 TiO_(2) 高碘酸盐活化 抗生素降解 机理分析 

分 类 号：X703[环境科学与工程—环境工程]