2006—2016年常州市政供水pH、浑浊度及余氯分析

谈立峰; 褚苏春; 惠高云

doi:10.13421/j.cnki.hjwsxzz.2018.01.014

2006—2016年常州市政供水pH、浑浊度及余氯分析

Analysis on pH, Turbidity and Residual Chlorine in Municipal Water Supplies in Changzhou from 2006 to 2016

摘要

摘要:
目的分析2006-2016年常州市政供水出厂水及管网末梢水的pH、浑浊度及余氯检测结果，为开展生活饮用水在线监测预警提供科学依据。
方法 2006-2016年常州市疾病预防控制中心对常州市区3家市政供水水厂的出厂水以及21个管网末梢水监测点进行每月1次的pH、浑浊度及余氯的实验室检测数据收集，并运用描述流行病学方法对收集的数据进行分析。
结果 3家市政供水水厂出厂水的pH、浑浊度及余氯均值分别为7.57±0.22、0.28±0.18（NTU）及0.59±0.14（mg/L），合格率均为100%，pH均值无显著性差异（P=0.108），浑浊度及余氯均值均有显著性差异（P < 0.05）；21个市政供水末梢水检测点的pH、浑浊度及余氯均值分别为7.59±0.23、0.35±0.18（NTU）及0.32±0.21（mg/L），合格率均为100%，pH、浑浊度及余氯均值均有显著性差异（P < 0.05）；3家市政供水出厂水、末梢水的pH均值无显著性差异（P=0.096），而浑浊度均值出厂水显著低于末梢水（P < 0.05），余氯均值出厂水显著高于末梢水（P < 0.05）。此外，出厂水以及末梢水的pH、浑浊度及余氯各月份之间均有显著性差异（P < 0.05）。
结论掌握市政供水水厂出厂水及管网末梢水的pH、浑浊度及余氯均值及其变化规律可为设置生活饮用水在线监测预警值提供科学依据。

Abstract:
Objectives To analyze the examination results of pH, turbidity and residual chlorine in finished water from water-supplies as well as in tap water of Changzhou from 2006 to 2016 in order to provide scientific basis for on-line monitoring and warning the quality of drinking water.
Methods Descriptive epidemiological method was used to analyze the examination results of pH, turbidity and residual chlorine in finished water from 3 municipal water supplies as well as in tape water from 21 monitoring sites by the Changzhou Center for Disease Control and Prevention once a month from 2006 to 2016.
Results The mean value of pH, turbidity and residual chlorine in finished water from 3 municipal water supplies were 7.57±0.22, 0.28±0.18 (NTU) and 0.59±0.14(mg/L), respectively; the qualification rates were all 100%. There were no significant difference on the mean of pH in finished water among 3 municipal water supplies (P=0.108), while there were significant difference on the mean value of turbidity and residual chlorine in finished water among 3 municipal water supplies (P < 0.05). The mean value of pH, turbidity and residual chlorine in tape water from 21 monitoring sites were 7.59±0.23, 0.35±0.18 (NTU) and 0.32±0.21 (mg/L), respectively; the qualification rates were all 100%. There were significant differences on the mean value of pH, turbidity and residual chlorine in tap water among 21 monitoring sites (P < 0.05). Moreover, there were no significant difference on the mean of pH between finished water and tape water (P=0.096). The turbidity in finished water was significantly lower than that in tape water (P < 0.05), and the residual chlorine in finished water was significantly higher than that in tap water (P < 0.05). There were significant differences on the mean value of pH, turbidity and residual chlorine in finished water and in tap water among 12 months (P < 0.05).
Conclusions To know the mornitoring results of pH, turbidity and residual chlorine and the rule of changing for finished water and tap water could provide scientific basis for on-line monitoring and warning the quality of drinking water.

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