某体温计厂附近土壤汞含量及影响因素研究

Study on the Soil Mercury Content and Its Influential Factors Near A Thermometer Factory

采集体温计厂周围300m内17个点的土壤作为样品，分析其全汞含量，并研究汞含量的影响因素。结果表明：距汞车间300m范围内土壤汞含量均超过背景值，土壤均表现出不同程度的汞污染。在体温计厂Hg车间排气口和排水口外的土壤属于极严重污染（Hg含量为8．65～19．77m昏／kg），在100m范围内为重污染区（Hg含量为1．48～2．75mg／kg），在100～300m范围内为中等污染区（Hg含量为0．15～0．95mg／kg）。分别为背景值的169、24、8倍。随着采样点到汞车间排气口距离的增加，土壤中汞的含量随之减少。土壤汞含量主要受当地主风向的影响。另外，在排气口和排水口附近往往汞含量极高。有机质含量对土壤中汞的含量有一定影响。

With soils from seventeen sites within 300 meter radius of thermometer factory as samples, the wholly-mercury content and their influencing factors were analyzed. The results showed that the mercury content in the framework of the soil within 300 meters was more than the background value which showed different levels of mercury pollution. Outside of the exhaust port and the outlet of the mercury workshop, the soil pollution was extremely serious （8.65 -19.77 mg/kg） , in 100 meters of the contaminated area serious pollution （1.48 -2.75 mg/kg）, within 100 -300 meters of the contaminated area medium pollution （0.15 -0.95 mg/kg）. They were 169,24,8 times as much as the back-ground values. As the distance between the sampling points to the workshop increasing, the content of mercury in soil on a decreasing trend. Mercury content in soil was mainly affected by local the main wind direction. In addition, the mercury content near the exhaust port and the outlet were often extremely high. The increasing in soil organic content had great influence on the content of mercury.