H2O2对O3-PMS体系降解碘帕醇的效能优化
Optimization of H2O2 on degradation of IPM in O3-PMS system
程莹 1臧纪 1李伟平 1谢荣焕 2刘桂建3
作者信息
- 1. 安徽国祯环境修复股份有限公司,合肥,230093;合肥市土壤及地下水修复工程技术研究中心,合肥,230093
- 2. 安徽国祯环境修复股份有限公司,合肥,230093;合肥市土壤及地下水修复工程技术研究中心,合肥,230093;中国科学技术大学地球和空间科学学院,合肥,230026
- 3. 合肥市土壤及地下水修复工程技术研究中心,合肥,230093;中国科学技术大学地球和空间科学学院,合肥,230026
- 折叠
摘要
碘化造影剂(ICMs)作为一种典型的药品和个人护理品(PPCPs)广泛应用于医疗行业,常规的水处理工艺很难将其有效去除,而目前报道中多采用的高级氧化工艺也仍存在不足.以碘帕醇(IPM)为例,通过实验模拟研究O3、O3-PMS、O3-PMS-H2O23种高级氧化体系的降解规律及消毒副产物生成情况,探究了 H2O2浓度、初始pH、氯离子、碳酸氢根离子、有机质对IPM降解效果的影响,并对IPM的可能降解途径进行了分析.结果表明,在O3-PMS体系中投加H2O2可以提升对IPM的降解效率,还能减少溴酸盐的产生;O3-PMS-H2O2体系在不同pH条件下对IPM均表现出良好的降解效果;Cl-、天然有机质的存在对O3-PMS-H2O2体系均具有抑制作用;CO32-/HCO3-形成缓冲体系则可以显著促进IPM的降解;O3-PMS-H2O2体系可以通过强氧化作用和取代脱碘的路径将IPM进行有效降解.本研究可以为ICMs污染水体的修复提供理论依据.
Abstract
Iodinated contrast agents(ICMs)such as iopamidol(IPM)are widely used in pharmaceutical and personal care products(PPCPs)and are difficult to be effectively removed by conventional water treatment processes.In this study,we investigated the degradation effects of different oxidation systems on IPM and the generation of disinfection by-products.The effects of H2O2 concentration,initial pH,Cl-,CO32-/HCO3 and natural organic matter on IPM degradation were studied,and the possible degradation pathways of IPM were further discussed.The results showed that adding H2O2 into the O3-PMS system can enhance the degradation efficiency of IPM and narrow the generation of disinfection by-products.The O3-PMS-H2O2 system showed a good degradation effect on IPM under pH conditions range 4 to 10.The presence of Cl-and NOM inhibited O3-PMS-H2O2 system,while the CO32-/HCO3 significantly promoted the degradation of IPM with their pH buffer effect.The intermediate degradation products results showed the IPM could be effectively degraded by the O3-PMS-H2O2 system through radical oxidation and deiodination.The results are expected to provide a theoretical basis for the remediation of ICMs-polluted water.
关键词
过氧化氢/O3-PMS/高级氧化/碘帕醇/溴酸盐Key words
hydrogen peroxide/O3-PMS/advanced oxidation processes/IPM/bromate引用本文复制引用
基金项目
安徽省科技重大专项(202003a06020024)
合肥市关键共性技术研发项目(2021GJ063)
出版年
2024
NETL
NSTL
万方数据