给水处理中溴酸盐控制技术研究进展及其强化策略探讨

Research Progress and Strengthening Strategy of Bromate Control Technology in Water Supply Treatment

臭氧技术具有较强的氧化性和杀菌性,是一种重要的水处理方法。臭氧氧化过程产生的溴酸盐(BrO_(3)^(-))是一种潜在的致癌物质,威胁着市民的饮用水卫生安全。如何有效控制溴酸盐的生成是国内外研究者关注的热点课题。首先介绍了溴酸盐的生成机理及主要影响因素,并综述了传统、新型和臭氧与其他高级氧化技术联用的溴酸盐控制机理、特点及研究现状。针对臭氧技术存在高有机物去除量与低溴酸盐生成量的矛盾问题,根据优化臭氧投加方式能够减少溴酸盐生成量、采用活性炭可以大量吸附带负电荷的溴酸盐、利用紫外线可以还原溴酸盐的原理,总结出一种臭氧/紫外线优化耦合生物活性炭方法(O_(3)/(O_(3)/UV-BAC))并建立了其实施策略,为今后开展该技术的深入研究及应用提供理论参考。

Ozone technology has strong oxidation and sterilization,which is an important method of water treatment.Bromate(BrO_3~-) produced in the oxidation process of ozone is a potential carcinogen,which threatens the drinking water safety of urban residents.How to effectively control the production of bromate is one of the hot topics that researchers at home and abroad pay attention to.The formation mechanism and main influencing factors of bromate were firstly introduced,The mechanism,characteristics and research status of traditional bromate control methods,new bromate control methods,and bromate control methods combining ozone and other advanced oxidation technologies were reviewed.In view of the contradiction between high organic matter removal and low bromate production in ozone technology,based on the theory that the optimization of ozone dosing method can reduce the generation of bromate,the theory that activated carbon can absorb a large amount of negatively charged bromate,and the theory that ultraviolet can reduce bromate,a combined technique(O_3/(O_3/UV-BAC)) optimized for ozone/ultraviolet method coupled with biological activated carbon method was summarized,and its implementation strategy was established,which could provide theoretical reference for further research and application of this technology in the future..