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惠阳区生活饮用水中稀土元素含量及分布状况

Content and Distribution of Rare Earth Elements in Drinking Water of Huiyang District
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摘要 目的:采用ICP-MS法测定广东省惠州市惠阳区内生活饮用水中16种稀土元素的含量,分析其分布状况、含量大小,解决惠阳区生活饮用水中稀土元素监测数据空白的问题,引起政府、供水单位及普通消费者对饮用水中稀土元素可能存在污染的重视,同时为政府等相关部门针对饮用水中稀土金属的监测、监督、监管机制提供参考和建议。方法:以惠阳区内9个街道(镇)的饮用水为样本,采用ICP-MS法每月测量一次不同水样类型(水源水、出厂水、末梢水、二次供水)中16种稀土元素的含量,通过分析数据,明确其含量大小、分布状况,找出不同时间段、不同区域、不同水样类型中含量及分布的差异。结果:惠阳区饮用水中稀土元素总体含量不高(1.477μg·L^(-1)),主要含有Sc、Y、Sm、Gd、Er、Tm、Yb、Ce和Nd;第四季度最高,第一季度最低,枯水期高于丰水期;从南北方位看,中部地区高于南、北部,从东西方位看,西部高于中、东部;水源水>出厂水>末梢水>二次供水。结论:惠阳区饮用水中稀土元素时空分布不均,含量远低于常规金属元素卫生限值,可认为惠阳区饮用水中含有的稀土元素及含量水平是安全的。 Objective:The contents of 16 rare earth elements in drinking water were determined by ICP-MS method in Huiyang district,Huizhou city,Guangdong province,and their distribution and content were analyzed to solve the problem of blank monitoring data of rare earth elements in drinking water of the Huiyang district,which caused the government,water supply units and ordinary people to pay attention to the possible pollution of rare earth elements in drinking water.At the same time,it provides reference and suggestions for the government and other relevant departments to monitor,supervise and regulate the rare earth metals in drinking water.Method:With nine streets(town)drinking water within their respective jurisdictions as sample,using ICP-MS method to measure different types of water once a month(source water,off-work water and pipe water,secondary water supply),the content of 16 kinds of rare earth elements in through the analysis of data,clarify its content size,distribution,find out the different times,different regions and different types of water content and the distribution difference.Result:The total content of rare earth elements in drinking water of Huiyang district was not high(1.477μg·L^(-1)),mainly containing Sc,Y,Sm,Gd,Er,Tm,Yb,Ce and Nd.It was the highest in the fourth quarter and the lowest in the first quarter.From the north-south perspective,the central region is higher than the south and north,and from the east-west perspective,the western region is higher than the central and east.Source water>factory water>end water>secondary water supply.Conclusion:The spatial and temporal distribution of rare earth elements in drinking water of Huiyang district is uneven,and the content of rare earth elements is much lower than that of conventional metal elements.It can be considered that the rare earth elements and their content levels in drinking water of Huiyang district are safe.
作者 段先兵 周献峰 黄紫欣 DUAN Xianbing;ZHOU Xianfeng;HUANG Zixin(Huiyang District Center for Disease Control and Prevention,Huizhou City,Huizhou 516211,China)
出处 《食品安全导刊》 2022年第27期100-102,106,共4页 China Food Safety Magazine
基金 2021年度惠州市医疗卫生类科技计划项目(2021WC0106282)。
关键词 生活饮用水 稀土元素 含量 分布状况 drinking water rare earth elements content distribution status
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