【摘要】 文中对某金矿区农田土壤及作物进行了调查。采集样品分析其中汞的含量,结果表明,农田土壤汞的含量范围为0.21～20.30mg/kg,均值为2.23mg/kg,高出对照区土壤值6.96倍;与土壤环境质量二级标准比较,最大超标倍数19.3,平均超标1.23倍,超标样本达到58.67%,土壤受到汞的轻度污染。作物中汞的含量范围为0.001～1.35mg/kg,均值为0.196mg/kg,平均值超过食品卫生限量标准18.6倍;作物中汞的含量分布规律是叶菜类>果实类>块根类,达到警戒水平的样本在74.28%以上。该研究成果可为环境污染的防治提供科学依据。更多还原

【Abstract】 The farmland soil and crops in a gold mining field were investigated. Samples were collected and their hydrargyrum contents were analyzed. The results showed that hydrargyrum contents in the farmland soil were in the range of 0. 21 ～ 20. 3 mg/kg and the average value was 2. 23 mg/kg. which was 6. 96 times higher than the value of the control group. Compared with the environmental quality standard of soil level Ⅱ,the maximum overproof times was 19. 3,the average overproof times was 1. 23 and the overproof rate was higher than 58. 67 % . The area of soil lightly polluted by hydrargyrum. Hydrargyrum contents in the crops were in the range of 0. 001 ～ 1. 35 mg/kg,and the aver- age value was 0. 196 mg/kg,which exceeded the limited standard of food sanitation 18. 6 times. The distribution law was that hydrargyrum content in fruit vegetable was lower than that in leaf vegetable but was higher than that in earth- nut vegetable. 74. 28 percent of the samples reached alert level. The results could provide scientific references for the environment pollution control.更多还原