2017-2019年广西城市供水水质总硬度监测结果分析  

Surveillance results of total hardness of municipal water supply in Guangxi,2017-2019

作　　者：韦日荣[1] 唐振柱[1] 黄江平[1] 黎勇[1] 黄林[1] 梁林涵[1] 许露曦 黄春光[1] 钟格梅[1] WEI Ri-rong;TANG Zhen-zhu;HUANG Jiang-ping;LI Yong;HUANG Lin;LIANG Lin-han;XU Lu-xi;HUANG Chun-guang;ZHONG Ge-mei(Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention,Nanning,Guangxi 530028,China)

机构地区：[1]广西壮族自治区疾病预防控制中心,广西南宁530028

出　　处：《实用预防医学》2021年第2期185-189,共5页Practical Preventive Medicine

基　　金：广西医药卫生计划课题(Z20170138)。

摘　　要：目的了解广西城市供水水质总硬度状况,为下一步研究饮用水硬度与健康关系提供科学依据。方法从全国饮用水水质监测信息系统导出广西2017-2019年城市饮用水水质监测数据。其中的供水信息通过查阅资料、现场调查等方式收集,水样采集、保存、运输和检测按《生活饮用水标准检验方法》(GB/T 5750-2006)进行,水质检测结果按《生活饮用水卫生标准》(GB 5749-2006)进行评价。结果 2017-2019年广西城市供水末梢水总硬度检测结果范围在0.0~266.8 mg/L,合格率100.0%。不同年度水质总硬度差异有统计学意义(P<0.001);不同区域水质总硬度也存在显著差异(P<0.001),最高的是河池市(210.4 mg/L),最低的是防城港市(9.8 mg/L)。不同水源类型水质硬度、同类型水源不同城市水质硬度均存在显著差异(P<0.001);地下水源末梢水硬度最高(165.3 mg/L),其次是江河水源(125.0 mg/L),最低是水库水源(93.9 mg/L)。末梢水pH值与总硬度呈正相关(rs=0.622,P<0.001),末梢水溶解性总固体与总硬度呈密切正相关(rs=0.907,P<0.001)。结论广西城市饮用水总硬度均符合国家标准要求,但不同区域、不同水源类型水质总硬度不同,应据此情况开展相关人群健康影响研究,并根据各地饮水特征指导人群合理膳食和健康饮水。Objective To understand the status of total hardness of municipal water supply in Guangxi, and to provide a scientific basis for the next research on the relationship between drinking water hardness and health. Methods Surveillance data about urban drinking water in Guanxi Province during 2017-2019 were derived from the National Drinking Water Quality Monitoring Information System. The information about water supply was obtained from data collection and on-site survey. All drinking water samples were collected, preserved, transported and tested according to the Standard Examination Methods for Drinking Water(GB/T 5750-2006), and the quality of drinking water was evaluated based on the Hygienic Standard for Drinking Water(GB 5749-2006). Results Test results showed that the total hardness of tap water in the urban areas of Guangxi from 2017 to 2019 ranged from 0.0 mg/L to 266.8 mg/L, with a qualified rate of 100.0%. The total hardness of tap water in different years showed statistically significant difference(P<0.001). There were statistically significant differences in the total hardness of tap water from different regions(P<0.001), with the highest being 210.4 mg/L in Hechi City and the lowest being 9.8 mg/L in Fangchenggang City. The hardness of tap water with different types of water sources and the hardness of tap water with same type of water sources in different cities were statistically significantly different(P<0.001). The hardness of tap water with groundwater source was the highest(165.3 mg/L), followed by river water source(125.0 mg/L), and that of tap water with reservoir water source was the lowest(93.9 mg/L). The pH value of tap water was positively correlated with the total hardness(r_s=6.22, P<0.001), and there was a closely positive correlation between the total dissolved solid and the total hardness(r_s=0.907, P<0.001). Conclusions The total hardness of drinking water in cities of Guangxi meets the national standard, but there are differences in the total hardness of tap water in different region

关 键 词：饮用水 硬度 PH 溶解性总固体 城市 

分 类 号：R123.1[医药卫生—环境卫生学]