摘要
目的研究臭氧消毒饮水过程中溴酸盐的生成规律及控制措施。方法采用碘量法和离子色谱法,对水中臭氧浓度及其生成的溴酸盐等副产物浓度进行了检测。结果在水中臭氧投加量为17.67 mg/L条件下,随着溴离子浓度增加所形成的溴酸盐浓度随之增加。本反应体系中溴离子浓度在0.5 mg/L时,溴酸盐浓度达到0.014mg/L。降低臭氧浓度、水温、色度以及酸性条件均对溴酸盐的生成有一定的抑制作用,实验体系水中加入0.025mg/L铵离子能够抑制溴酸盐的生成,低于本方法的检出限。结论臭氧消毒水体水中溴离子浓度是影响溴酸盐浓度的主要因素,添加铵盐可以控制溴酸盐的生成。
Objective To study the generation regularity and control measure of bromate which was a kind of by-product in ozone disinfection of drinking water.Methods Iodimetry and ion chromatography were used to determine the concentration of ozone and bromate in water respectively.Results The bromate concentration increased as the bromine ion concentration rose when the venting concentration of ozone approached to 17.67 mg/L.In this reaction system when bromine ion was 0.5 mg/L,bromate concentration achieved 0.014 mg/L.Less bromate was produced by reducing concentration of ozone in water,decreasing both water temperature and water colority,and acid water.With 0.025 mg/L ammonium ion in water,bromate generation was suppressed,and the bromate concentration reduced below the detection limit of this method.Conclusion When disinfecting drinking water with ozone the concentration of bromine ion is the main factor which can affect bromate concentration.Bromate production can be reduced by adding ammonium salt.
出处
《中国消毒学杂志》
CAS
2010年第5期509-511,514,共4页
Chinese Journal of Disinfection
基金
国家科技支撑计划(2006BAD01B05-03)
关键词
臭氧
溴酸盐
消毒副产物
饮水消毒
ozone
bromate
by-product
drinking water disinfection
