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.
作者
吴悦
吴纯德
WU Yue WU Chunde(Shantou Polytechnic, Shantou 515078, China College of Environment and Energy, South China University of Technology, Guangzhou 510006, China)
出处
《环境工程学报》
CAS
CSCD
北大核心
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)
