UV/H2O2技术对上海青草沙水源水砂滤后溴酸根和三卤甲烷的生成控制  

Control of bromate and trihalomethanes by UV/H_2O_2 in the sand-filtered water from Shanghai Qingcaosha reservoir

作　　者：李伟伟[1] 许可[1] 董慧峪[1] 陈卫平[1] 强志民[1] 

机构地区：[1]中国科学院生态环境研究中心,饮用水科学与技术重点实验室,北京100085

出　　处：《环境化学》2016年第4期615-622,共8页Environmental Chemistry

基　　金：水体污染控制与治理科技重大专项(2012ZX07403-00-02)资助~~

摘　　要：针对含溴离子(Br-)的上海某水厂滤后水的高级氧化处理,考察了紫外/过氧化氢(UV/H_2O_2)技术对UV254和总有机碳(TOC)的削减效率、控制消毒副产物溴酸根(Br O-3)和三卤甲烷(THMs)的生成情况,同时研究了水中溴离子(Br-)浓度的改变对UV/H_2O_2处理效果的影响.结果表明,UV/H_2O_2处理工艺不产生Br O-3;500 m J·cm-2的UV剂量和5 mg·L-1H_2O_2投加量下,出水UV254和TOC分别降低了35%和21%;后续氯消毒过程中的THMs生成势随H_2O_2投加量的增加显著降低,500 m J·cm-2的UV剂量下,H_2O_2投加量为5 mg·L-1和10 mg·L-1时,THMs生成势的削减率分别为49.4%和79.9%;水中Br-浓度的改变不影响UV/H_2O_2工艺的运行效果;相比UV,UV/H_2O_2还可使9种农药的降解率提高50%—85%.因此,UV/H_2O_2在含Br-水源水深度处理方面有着较好的应用前景.For advanced oxidation of sand filtered water from a water treatment plant in Shanghai,UV / H2O2 was applied to decrease UV254 and Total Organic Carbon（ TOC）,and to control the formation of disinfection byproducts-bromate（ BrO3^-） and trihalomethanes（ THMs）. The influence of bromide ion（ Br^-） concentration on UV/H2O2 treatment was also examined. The results showed that no BrO3^-was found after UV / H2O2 oxidation. UV254 and TOC were decreased by 35% and21%,respectively,with 500 mJ·cm^-2 UV dose and 5 mg·L^-1 H2O2. THMs were decreased by 49.4% and 79. 9% in subsequent chlorination process,with H2O2 dose being 5 and 10 mg·L^-1 respectively. Br^-concentrations had no effect on UV / H2O2 treatment. The degradation rates of nine pesticides were increased by 50% —85% in UV / H2O2 than that in UV. Thus,UV / H2O2 is feasible as an advanced treatment technology for water containing bromide ions.

关 键 词：溴离子 溴酸根 三卤甲烷 饮用水 高级氧化 UV/H2O2 

分 类 号：TU991.2[建筑科学—市政工程]