用Nano-TiO_2/O_3和Nano-TiO_2/UV/O_3去除腐殖酸并控制臭氧副产物的生成  

Humic acid removal and ozonation by-products control in Nano-TiO_2/O_3 and Nano-TiO_2/UV/O_3 processes

作　　者：吴悦[1] 吴纯德[2] WU Yue WU Chunde(Shantou Polytechnic, Shantou 515078, China College of Environment and Energy, South China University of Technology, Guangzhou 510006, China)

机构地区：[1]汕头职业技术学院,汕头515078 [2]华南理工大学环境与能源学院,广州510006

出　　处：《环境工程学报》2016年第11期6446-6450,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51078148;41173103);汕头职业技术学院科研课题(SZK2016Y17)

摘　　要：采用Nano-TiO_2/O_3和Nano-TiO_2/UV/O_3进行小试实验。通过对DOC、UV254、BrO_3^-和甲醛进行检测分析,研究了不同体系去除腐殖酸(HA)并控制臭氧副产物生成的效果。结果表明,当HA浓度为10 mg·L^(-1)时,Nano-TiO_2/O_3体系对DOC的去除主要在反应进行20 min内完成,去除率仅达12.0%左右,对UV254的去除主要发生在2 min内,去除率仅达14.5%左右;而Nano-TiO_2/UV/O_3体系DOC和UV254的去除率分别达32.8%和53.3%。HA的存在显著减少了NanoTiO_2/O_3体系BrO_3^-的生成量,出水BrO_3^-浓度为29.00μg·L-1,而Nano-TiO_2/UV/O_3体系出水BrO_3^-浓度为5.00μg·L-1。研究表明,相比Nano-TiO_2/O_3体系,Nano-TiO_2/UV/O_3体系能更好地控制BrO_3^-生成,同时能提高对HA的去除效果,且无甲醛生成的风险。The effects of different processes on humic acid（ HA） removal and ozonation by-products control were investigated using the nano-TiO_2/ O_3 and nano-TiO_2/ UV / O_3 processes,while monitoring dissolved oxygen content（ DOC）,UV254 transmission,BrO_3^-content,and formaldehyde content. In the nano-TiO_2/ O_3 process with an HA concentration of 10 mg ·L-1,the DOC dropped rapidly during the initial 20 min of the reaction,with a removal rate of 12. 0%,while the UV254 transmission decreased rapidly within 2 min,giving a removal rate of 14. 5%. However,in the nano-TiO_2/ UV / O_3 process,the DOC and UV254 transmission values dropped by32. 8% and 53. 3%,respectively. Furthermore,in the nano-TiO_2/ O_3 process,HA inhibited BrO_3^-formation,giving a BrO_3^-concentration of 29. 00 μg·L-1in the finished water,compared to 5. 00 μg·L-1for the NanoTiO_2/ UV / O_3 process. Thus,the nano-TiO_2/ UV / O_3 process was more useful for simultaneous BrO_3^-control and HA removal without the risk of formaldehyde formation.

关 键 词：纳米二氧化钛 催化臭氧化 光催化臭氧化 腐殖酸 溴酸盐 甲醛 

分 类 号：X703[环境科学与工程—环境工程]