【摘要】：目的了解北京市城區(qū)生活飲用水中34種元素的水平。方法于2016年9月15日—20日在北京市四個(gè)方向的城區(qū)隨機(jī)選取92戶家庭,采集自來水以及其中24戶家庭的凈水設(shè)備出水,檢測(cè)并評(píng)價(jià)其中飲用水標(biāo)準(zhǔn)中規(guī)定有標(biāo)準(zhǔn)限值的17種元素。結(jié)果除了個(gè)別家庭自來水中鐵和汞元素超出限值外,其余家庭的17項(xiàng)元素指標(biāo)均符合《生活飲用水衛(wèi)生標(biāo)準(zhǔn)》的要求。一次供水18種元素檢出率為3.1%~63.1%,16種稀土元素的檢出率為47.6%~100%;二次供水18種元素檢出率為3.7%~63.0%,16種稀土元素的檢出率48.9%~100%;凈水設(shè)備出水18種元素檢出率為4.2%~75.0%。凈水設(shè)備出水和二次供水中的銀元素濃度明顯高于一次供水(F_(Ag)=4.21,P0.05),其余33種元素在不同供水方式的飲用水樣中沒有明顯差異。硒、鎳和鐵三種元素濃度在城區(qū)四個(gè)不同地理方位的市政供水樣品中存在差異(F_(Se)=3.64,P0.05;F_(Ni)=3.38,P0.05;F_(Fe)=3.83,P0.05)。結(jié)論 2016年北京市城區(qū)提供給居民一次供水和二次供水的飲用水水質(zhì)是有保證的。
[Abstract]:Objective to investigate the level of 34 elements in drinking water in urban areas of Beijing. Methods from September 15 to 20, 2016, 92 families were randomly selected in four directions of Beijing. Tap water and the effluent of water purification equipment from 24 of them were collected, and 17 elements with standard limits in drinking water standard were detected and evaluated. Results except for iron and mercury in tap water of individual households, the 17 elements of other households met the requirements of Sanitary Standard for drinking Water. The detection rate of 18 elements in primary water supply was 3.1% 鈮，

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