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目的在南水(丹江口水库水)入京前对西城南部地区生活饮用水中钠、钾、镁、钙4种阳离子含量水平做调查,为研究南水入京后北京市西城南部地区生活饮用水水质变化情况提供参考数据。方法在西城南部地区选取11个监测点,采用电感耦合等离子体发射光谱法,连续7个月监测市政管网水中钠、钾、镁、钙含量。结果 2014年6—12月共检测水样77件,西城南部地区生活饮用水中4种阳离子的浓度范围分别为:钠16.09~56.56 mg/L,钾2.35~4.20 mg/L,镁20.59~45.16 mg/L,钙43.45~96.65 mg/L。不同监测地点水中钠、镁、钙含量差异有统计学意义(P<0.05)。结论西城南部地区南水入京前生活饮用水中钠、钾的含量水平相对较低,镁、钙的含量水平略高。
Objective To investigate the levels of four kinds of cations such as sodium, potassium, magnesium and calcium in the drinking water in the southern part of Xicheng before entering Nanjing (Danjiangkou reservoir water). In order to study the changes of the water quality of drinking water in the southern part of Xicheng, The situation provides reference data. Methods Eleven monitoring sites were selected in southern area of Xicheng. The content of sodium, potassium, magnesium and calcium in the municipal pipe network water was monitored for 7 consecutive months by inductively coupled plasma atomic emission spectrometry. Results A total of 77 water samples were collected from June to December 2014. The concentrations of the four cations in drinking water in the southern area of Xicheng were 16.09-56.56 mg / L for sodium, 2.35-4.20 mg / L for potassium and 20.59-45.16 for magnesium mg / L, calcium 43.45 ~ 96.65 mg / L. The contents of sodium, magnesium and calcium in water of different monitoring sites were significantly different (P <0.05). Conclusion The levels of sodium and potassium in domestic drinking water before the south water in the southern part of Xicheng City are relatively low, and the levels of magnesium and calcium are slightly higher.