从PM_(10)的测量推测成都市区汞污染的来源

Detecting mercury pollution sources based on PM_(10) in Chengdu

通过2007年5—6月期间测量成都市若干条剖面上大气可吸入颗粒物(PM10)中的汞含量,来推测成都市大气中汞的来源。结果表明:在12个点的测量范围内,成都市PM10的质量平均浓度为210.8μg/m3;PM10中汞的质量平均浓度为0.36ng/m3。公园和郊区PM10浓度和其中汞浓度均较少,可能与植被茂盛有关。由PM10中汞的分布可知,在热电厂、停用的生活垃圾堆放场和寺庙附近出现最高值,说明热电厂和生活垃圾堆放场是大气汞污染的重要次生来源。寺庙附近出现的高汞值,推测与寺庙的礼仪活动如香烛燃烧有关。

Mercury contents of inhalable particulate matter （PM10） in the air were surveyed in order to detect the mercury pollution sources in Chengdu. The results indicated that the mean mass concentration of PM10 was 210.8μg/m^3 in 12 sampling sites. The mean mass concentration of mercury in PM10 was 0.36μg/m^3. Both PM10 concentration and mercury concentration were lower in park and suburb because of flourishing plant. Mercury concentration was higher in power plant, disused garbage dump and temples. It proved that the power plant and garbage dump were the main secondary sources. And the higher mercury concentration near temples may be caused by the Buddhism ceremony such as incense burning.