2021年枣庄市城乡生活饮用水中总硬度检测结果分析

Monitoring Results and Analysis of Total Hardness for Drinking Water in Zaozhuang in 2021

目的:了解枣庄市居民生活饮用水中总硬度,为改善枣庄市居民生活饮用水的水质提供科学依据。方法:2021年对枣庄市生活饮用水的监测点进行水样采样和检测,采样时间为枯水期和丰水期均采集1次。将总硬度作为水样的检测项目,采样和检测过程均参照国家标准实施。结果:2021年共检测水样392份,总硬度的合格率为82.1%。总硬度的平均值是346.85 mg·L^(-1)(38.6~954.3 mg·L^(-1))。其中,枯水期与丰水期的总硬度无显著性差异(P>0.05);出厂水与末梢水的总硬度无显著性差异(P>0.05);地下水总硬度高于地表水总硬度,有显著性差异(P<0.05),城市水总硬度高于农村水总硬度,有显著性差异(P<0.05)。结论:2021年枣庄市生活饮用水总硬度总体比较理想,适合饮用,建议全面评价饮用水中的总硬度与人体健康的关系,指导居民健康饮水。

Objective:To assess the total hardness for drinking water in Zaozhuang,so as to provide recommendations for improving water quality.Method:The data were obtained from the monitoring of drinking water in Zaozhuang in 2021.The samples were tested for total hardness twice a year(respectively in wet season and dry season).Sampling laboratory testing and assessment were conducted according to national standards.Result:A total of 392 samples were detected in 2021,the qualified rate was 82.1%,and the mean values of concentrations for total hardness was 346.85 mg·L^(-1)(38.6~954.3 mg·L^(-1)).There was no significant difference in total hardness between dry and wet seasons(P>0.05).There was no significant difference in total hardness between terminal water and finished water(P>0.05).The total hardness in underground water was significantly higher than that in surface water(P<0.05).The total hardness in urban water was significantly higher than that in rural water(P<0.05).Conclusion:In 2021,the total hardness of drinking water in Zaozhuang was generally ideal,and which was suitable for drinking.It is advised to comprehensively evaluate the relationship between the total hardness of drinking water and human health,and guide residents to drink healthy water.