UV/SO32-工艺去除水体中溴酸盐的效果
Effect of Removing Bromate from Water by UV/SO32-Process
沈恺乐 1龚思成 2韦文博 1张新欢1
作者信息
- 1. 上海市水利工程设计研究院有限公司,上海 200232
- 2. 同济大学环境科学与工程学院,上海 200092
- 折叠
摘要
紫外/亚硫酸盐(UV/SO32-)工艺是一种通过产生强还原性的活性自由基来降解污染物的高级还原工艺(ARPs).文章研究了UV/SO32-工艺降解溴酸盐(BrO3-)的效能与机制.结果表明,UV/SO32-工艺还原BrO3-符合拟一级动力学模型;增大UV光照强度、SO32-投加量、溶液pH,去除溶液中的溶解氧(DO),可有效提高BrO3-的去除率;水体中的HCO3、Cl-和天然有机物会不同程度地抑制BrO3-的降解;自由基淬灭试验显示水合电子(eaq-)是UV/SO32-工艺降解BrO3-的主要活性物质,并由此推断出可能的BrO3-降解路径.
Abstract
Ultraviolet/sulfite(UV/SO32-)process is an advanced reduction process(ARP)that degrades contaminants by producing strongly reductive active free radicals.The efficiency and mechanism of degradation of bromate(BrO3-)by UV/SO32-process were studied.The results showed that the reduction of BrO3-by UV/SO32-process conformed to the pseudo-first-order kinetic model,and the removal rate of BrO3-could be effectively improved by increasing the UV light intensity,the dosage of sulfite,the pH value of solution,and removing dissolved oxygen(DO)in solution.HCO3,Cl-and natural organic matter in water inhibited the degradation of BrO3-.The quenching experiment showed that hydrated electron(eaq-)was the main active substance in the degradation of BrO3-by UV/SO32-process.The possible degradation pathway of BrO3-was deduced.
关键词
UV/SO32-工艺/溴酸盐/水合电子/降解动力学/反应机制Key words
UV/SO32-process/bromate/hydrated electron/degradation kinetics/reaction mechanism引用本文复制引用
基金项目
上海市青年科技英才"扬帆计划"项目(21YF1442200)
出版年
2024
国家科技期刊平台
NSTL
万方数据