【摘要】 目的某自来水厂饮用水发蓝原因调查分析。方法采用现场卫生学调查与实验室检测相结合的分析方法,按照《生活饮用水标准检验方法》GB/T 5750-2006、《生活饮用水卫生标准》GB/T 5749-2006、《食品中合成着色剂的测定》GB/T 5009.35-2003进行相应项目的采样、检测和评价。结果该厂水源水、出厂水Cu2+浓度符合国家标准,李某户内龙头水和卢某座便器水箱水理化性质一致,均检出阴离子合成洗涤剂和亮蓝成分。李某户内龙头水和卢某座便器水箱水阴离子合成洗涤剂含量分别为16 mg/L和47 mg/L,亮蓝含量分别为3.2 mg/L和6.6 mg/L。结论自来水发蓝系座便器止回阀失灵,加上停水形成管道负压,座便器水箱中的水因虹吸回流到供水管道所致。水颜色"发蓝"是亮蓝引起。更多还原

【Abstract】 Objective To investigate and analyze the cause of the blue color of tap water. Methods The water samples were investigated, determined and evaluated combing hygiene investigation with laboratory testing according to the standard test methods for Drinking Water(GB/T5750-2006), Hygienic Standard for Drinking Water(GB/T5749-2006) and Determination of Synthetic Color in Foods(GB/T 5009.35-2003). Results The concentration of copper ion in source water and finished water were qualified with national standard. The indoor tap water of Lee and toilet tank water of Lu were in consistent with the physical and chemical properties,containing of anionic surfactant and brilliant blue. The anionic surfactant of the indoor tap water of Lee and toilet tank water of Lu were 16mg/L and 47mg/L, respectively. Brilliant blue of them were 3.2mg/L and 6.6mg/L. Conclusion The results show that pollution accident of valve failure is caused by toilet tank water backflow to the supply pipe due to negative pressure. The pollutant is brilliant blue.更多还原