摘要
目的了解北京市朝阳区部分生活饮用水中7种无机阴离子(氟离子、氯离子、硫酸盐、硝酸盐氮、溴离子、亚硝酸盐氮和磷酸盐)和5种消毒副产物(亚氯酸盐、氯酸盐、溴酸盐、二氯乙酸和三氯乙酸)的含量水平。方法使用淋洗液在线发生-离子色谱法测定饮用水中12种组分的含量,采用非参数检验(Wilcoxon配对法)比较枯水期和丰水期各组分的含量。结果市政水中亚硝酸盐氮在丰水期的合格率为92.59%,其余组分的合格率均为100%;水样中氟离子、氯离子、硫酸盐、氯酸盐和溴离子的浓度在枯水期和丰水期的差异有统计学意义。农村水中除硝酸盐氮和亚硝酸盐氮外,其余组分的合格率均为100%;水样中氯离子、硝酸盐氮、硫酸盐、亚硝酸盐氮和溴离子的浓度在枯水期和丰水期的差异有统计学意义。结论部分水样中亚硝酸盐氮和硝酸盐氮超标,应加强对水样的监测。同时应加强丰水期消毒剂的使用管理和对农村水的消毒。
Objective To understand the concentrations of 7 anions(F^-,Cl^-,SO_4^(2-),NO_3^--N,Br^-,NO_2^--N and PO_4^(3-)) and 5 disinfection by-products(ClO_2^-,ClO_3^-,BrO_3^-,DCAA and TCAA) in drinking water in Chaoyang district of Beijing.Methods Twelve components were determined by ion chromatography with on-line eluent generator,and the concentrations of these components in dry season and wet season were compared with non-parametric test(Wilcoxon matched pair technique).Results In the municipal water,except the qualified rate of NO_2^--N was 92.59% in wet season,the qualified rates of the other components were all 100%.The differences of concentrations of F^-,Cl^-,SO_4^(2-),ClO_3^- and Brbetween dry season and wet season were statistically significant.In the rural water,except NO_3^--N and NO_2^--N,the qualified rates of the other components were 100%,and the differences of concentrations of Cl-,NO_3^--N,SO_4^(2-),NO_2^--N and Brbetween dry season and wet season were statistically significant.Conclusion The NO_3^--N and NO_2^--N levels exceeded the standard in some water samples.The drinking water quality surveillance,management of disinfectants during wet seasons and the disinfection for rural water should be strengthened.
作者
刘烨
崔蓉
王硕
LIU Ye;CUI Rong;WANG Shuo(School of public health, Peking University, Beijing 100191 , China;Chaoyang District Center for DiseaseControl and Prevention, Beijing 100021 , China)
出处
《首都公共卫生》
2017年第5期224-227,共4页
Capital Journal of Public Health
关键词
阴离子
消毒副产物
生活饮用水
离子色谱
Anions
Disinfection by-products
Drinking water
Ion chromatography
