重金属是雨水径流中的重要污染物质。为探究雨水径流中重金属的季节变化规律。地理位置因素和人为因素对重金属含量的影响。根据西安市城区内道路类型、路面材质、交通量、人流量等因素选择5个采样点,以2013年全年的降雨样品作为研究对象,利用电感耦合等离子质谱仪(ICP-MS)测定雨水径流中重金属Cd、Zn、Fe、Mn、Al、Pb的质量浓度。研究结果表明:Cd的质量浓度正常,低于地表水环境质量Ⅰ类标准,受地理位置、人为活动以及季节变化的影响极小。Zn的质量浓度正常,在地表水环境质量标准第Ⅰ类和第Ⅱ类标准之间;与地理位置、人为活动以及季节变化没有明显关系。Fe的含量因地理位置不同而异,交通繁忙、商业活动较多的小寨四季雨水径流中的Fe均较高,均为城市供水水质标准的3倍,商业活动的影响大于车辆交通的影响,校园秋季雨水中Fe为水质标准的2倍,其它3个季节水质正常,浓度的影响较小,人为因素对雨水中Fe含量的有一定的影响,人流量大的区域雨水中Fe的含量相对较高。冬季燃煤对雨水中Mn的含量影响较为明显。Mn只在冬季雨水中的含量略高于城市供水水质标准,对环境影响很小;地理位置,人为活动,区域职能对Mn的含量均没有明显的影响。Al的含量在城市供水水质标准限值内,受人流量、区
Heavy metals are important pollutants in storm water runoff. To explore the rule of seasonal change of heavy metals in storm runoff and how the location factors and human factors affect heavy metal content. Depending an the type of Xi’ an urban road traffic capacity, traffic and other factors, choose five sampling point. In 2013, take the year’s rainfall samples as the research object, using inductively couples plasma mass spectrometry(ICP-MS) to measure concentration of Cd, Zn, Fe, Mn, Al, Pb in storm water runoff. The results show that the quality of the Cd concentration is normal below the surface water environment quality first class standard, the geographical position, the influence of human activities and the change of seasons. The quality of the zinc concentration is normal, between the the first class and the second class of surface water environment quality standard and had no relation with the geographical location, human activities and the change of seasons. The