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目的了解包头市黄河水源地11种微量元素的含量。方法于2009—2011年平水期(1—3和10—12月)、枯水期(5—7月)、丰水期(4和8—9月)月初(1—5日),采集黄河包头段对照断面(上游的昭君坟)、控制断面(黄河中游的画匠营子)、出境断面(黄河下游的磴口)水样,测定水中砷、铬、镉、汞、铅、氟、铜、锌、铁、锰、硒11种微量元素的含量。结果11种元素含量均未超标。2009年枯水期氟、硒含量,2011枯水期锌、硒、镉含量均较高。2011年对照断面水样中铬含量低于控制断面、出境断面,差异均有统计学意义(P<0.05);3个断面其他元素含量间无显著变化。结论各年度包头市饮用水水源微量元素含量虽有波动,但仍处于安全水平。
Objective To understand the content of 11 trace elements in the Yellow River water sources in Baotou. Methods During the period from January to May in the normal period of 2009-2011 (1-3 and 10-12 months), dry season (May-July) and wet season (4-8 and September), Baotou section of the Yellow River Chromium, cadmium, mercury, lead, fluorine, copper, zinc, and zinc in water were measured in the control section (Zhaojun grave in the upper reaches), the water quality of the control section (Duanjiangyingzi in the middle reaches of the Yellow River) and the exit section Iron, manganese, selenium 11 kinds of trace elements content. Results Eleven elements were not exceeded. In the dry season of 2009, fluorine and selenium contents, zinc, selenium and cadmium contents in the dry season of 2011 were all higher. The content of chromium in control section was lower than that in control section and exit section in 2011 (P <0.05). There was no significant change in the content of other elements in the three sections. Conclusion Although the content of trace elements in drinking water in Baotou City fluctuated each year, it is still at a safe level.