2015年-2017年深圳市生活饮用水中总硬度和溶解性总固体检测结果分析  

Monitoring results and analysis of total hardness and total dissolved solids for drinking water in Shenzhen during 2015-2017

作　　者：蓝涛[1] 季佳佳[1] 王玮[1] 冯锦姝[1] 郭寅生[1] 余淑苑[1] LAN Tao;JI Jia-jia;WANG Wei;FENG Jin-shu;GUO Yin-sheng;YU Shu-yuan(Shenzhen Municipal Center for Disease Control and Prevention,Shenzhen,Guangdong 518000,China)

机构地区：[1]深圳市疾病预防控制中心,广东深圳518000

出　　处：《中国卫生检验杂志》2020年第21期2649-2652,共4页Chinese Journal of Health Laboratory Technology

基　　金：深圳市医学重点学科(SZXK067)。

摘　　要：目的了解深圳市生活饮用水中总硬度和溶解性总固体的含量,为改善深圳市居民生活饮用水水质提供科学依据。方法2015年-2017年对深圳市10个区的生活饮用水监测点进行采样检测,丰水期和枯水期各1次。检测项目为总硬度和溶解性总固体,采样与检测过程严格按照国家标准实施。结果2015年-2017年共检测1108份水样。总硬度和溶解性总固体的合格率均为100%。总硬度平均值为37.5 mg/L(0.66 mg/L^165.0 mg/L);溶解性总固体平均值为93.9 mg/L(19.0 mg/L^718.0 mg/L)。其中,2015年的生活饮用水中的总硬度和溶解性总固体含量最高,2017年次之,2016年最低(P<0.05)。枯水期的总硬度和溶解性总固体水平均高于丰水期(P<0.05)。二次供水的总硬度和溶解性总固体含量高于出厂水和末梢水(P<0.05)。以湖泊为水源的生活饮用水中的总硬度和溶解性总固体含量高于以水库和江河作水源(P<0.05)。结论深圳市近年来的生活饮用水口感较好,适合饮用,但是总硬度整体上偏低,建议市民注重日常钙镁元素的摄入。Objective To assess the total hardness and the total dissolved solids for drinking water in Shenzhen,so as to provide recommendations for improving water quality.Methods The data were obtained from the monitoring of drinking water in Shenzhen from 2015 to 2017.The samples were tested for total hardness and total dissolved solid twice a year(respectively in wet season and dry season).Sampling,laboratory testing and assessment were conducted according to national standards.Results A total of 1108 samples were detected in 2015-2017,100%samples were up to the national standards on two items.The mean values of concentrations for total hardness and total dissolved solids were 37.5 mg/L(0.66 mg/L-165.0 mg/L)and 93.9 mg/L(19.0 mg/L-718.0 mg/L),respectively.The highest concentration of total hardness and total dissolved solids was in 2015,followed by 2017,and the lowest concentration of total hardness and total dissolved solids was in 2016(P<0.05).The total hardness and total solid solubility in the dry season were higher than those in the wet season(P<0.05).These two items of secondary supplied water were higher than finished water and tap water(P<0.05).The content of total hardness and total solid dissolved in drinking water from lakes is higher than that from reservoirs and rivers(P<0.05).Conclusion In recent years,the drinking water in Shenzhen has a good taste and is suitable for drinking,but the overall hardness is low.It is suggested that the public pay attention to the intake of daily calcium and magnesium.

关 键 词：生活饮用水 总硬度 溶解性总固体 

分 类 号：R123.1[医药卫生—环境卫生学]