铜仁汞矿区土壤汞污染现状调查研究

为了进一步对废弃汞矿污染区的生态环境进行跟踪调查及科学的评价,2015年通过对铜仁市废弃汞矿区周围的稻田、旱田及菜地土壤汞污染现状调查分析。采用S型随机抽样方式,并使用原子荧光光度法对研究对象进行分析。结果表明:万山镇、云场萍及路腊村汞矿区稻田土壤总汞(THg)含量平均值分别为123.75、79.33、21.89 mg/kg;其旱田土壤THg含量平均值分别为:117.20、73.34、19.90 mg/kg;其菜地土壤THg含量平均值分别为129.40、81.78、26.50 mg/kg;且,万山汞矿区甲基汞(Me Hg)含量平均值分别为6.48(稻田)、4.80(旱田)、6.40μg/kg(菜地);云场萍汞矿区Me Hg含量平均值分别为3.73(稻田)、2.47(旱田)、6.40μg/kg(菜地);路腊村汞矿区Me Hg含量平均值分别为1.92(稻田)、0.87(旱田)、2.47μg/kg(菜地)。以上结果说明万山废弃汞矿区的污染程度高于云场萍废弃汞矿区及路腊村废弃汞矿区。

Investigation of Soil Mercury Pollution in the Mercury Mining Areas of Tongren City

In 2015, the current status of soil mercury pollution in the rice fields, dry lands and vegetable fields surrounding the abandoned mercury mining areas of Tongren City was investigated and analyzed for further tracking survey and scientific evaluation of the eco-environment of used mercury polluted areas. S-type random sampling method was used and atomic fluorescence was adopted to analyze the study targets. The results indicated that the average content of THg was 123.75, 79.33 and 21.89 mg/kg in the rice fields surrounding the mercury mining areas of Wanshan County, Yunchangping and Lula Village respectively, 117.20, 73.34 and 19.90 mg/ kg in the dry lands and 129.40, 81.78 and 26.50 mg/kg in the vegetable fields. With regard to Wanshan mercury mining area, the average content of MeHg was 6.48 μg/kg in the rice land, 4.80 μg/kg in the dry land and 6.40 μg/kg in the vegetable field. With regard to Yunchangping mercury mining area, the average content of MeHg was 3.73 μg/kg in the rice land, 2.47 μg/kg in the dry land and 6.40 μg/kg in the vegetable field. With regard to Lula Village mercury mining area, the average content of MeHg was 1.92 μg/kg in the rice land, 0.87 μg/kg in the dry land and 2.47 μg/kg in the vegetable field. Therefore, from the above results, it was concluded that the level of mercury pollution in Wanshan mercury mining area was much higher than that in Yunchangping and Lula Village mercury mining areas.