新余市土壤汞污染现状分析

以江西省新余市为研究区,应用原子吸收分光光度法(AAS)对辖区不同位置土壤中的总汞(THg)进行测定。结果表明:新余市土壤的重金属Hg平均含量为0.065 9 mg/kg,各样点汞含量变化范围为0.013 6~0.171 7 mg/kg,表明调查区土壤Hg含量尚未达到危害生态环境的污染水平;4个样点区中,均值大小排列次序为:分宜县>渝水区>高新开发区>仙女湖区。不同土壤类型汞含量范围为0.024 9~0.119 2 mg/kg,汞含量大小为:石灰土>山地黄壤>潮土>水稻土>红壤>红色石灰土;在不同土地利用方式下,汞含量大小为:工矿区(0.128 5 mg/kg)>宜林地>水稻田>荒地>菜地>旱地(0.028 4 mg/kg)。由于没有很显著的污染源,其值不高,污染较轻微,其污染和控制有待进一步研究。

Analysis of the Mercury Pollution Status in the Soil of Xinyu City

With Xinyu City of Jiangxi Province as the research area,the content of total mercury in soil in different locations of the area was determined by using atomic absorption spectrometry(AAS).The results showed that the average content of heavy metal Hg in soil of Xinyu City was 0.065 9 mg/kg.The change range of Hg content in different sampling sites was 0.013 6-0.171 7 mg/kg,which indicated that soil Hg content in the area still didn't reach the level of polluting the ecological environment.Among 4 sampling areas,the average values were as follows: Fenyi County> Yushui District > high-tech development district > Xiannv Lake District.The range of Hg content in different types of soil was 0.024 90.119 2 mg/kg.The content of Hg in different types of soil was as follows: lime soil > mountain yellow soil> alluvial soil > paddy soil> red soil> red lime soil.Hg content in different land use patterns was as follows: industrial and mining areas(0.128 5 mg/kg)> forest land> paddy land> wasteland> vegetable land> dry land(0.028 4 mg/kg).In the absence of significant pollution sources,its value was not high and the pollution was slight.Further study was needed on its pollution and control.