中文摘要：

对石门雄黄矿区周边土壤和作物进行了系统研究.结果表明：矿区表层（0～20cm）土壤砷含量平均为99.51mg·kg^-1,比湖南省土壤砷含量背景值高出5.34倍,为当地普通农田土壤的9.70倍;矿区水田和旱地表层土壤砷含量分别为43.51和115.1mg·kg^-1,分别超出国家土壤环境质量II级标准0.45和1.87倍,相应的表层土壤样本超标率分别为62.5%和50.0%;矿区粮食作物、蔬菜和水果可食部位砷含量分别为0.16、0.06、0.01mg·kg^-1,作物样本超标比例由高至低的顺序为粮食作物〉蔬菜〉水果,其中以稻米、红薯中砷含量超标较严重,稻米砷含量最高达0.84mg·kg^-1,超过国家食品质量标准4.6倍,样本超标率达62.5%.土壤砷含量与作物砷含量呈极显著正相关（P〈0.01）,当地居民通过食用矿区农产品进入人体的平均日摄取砷量为6.416μg·kg^-1·d^-1,远高于WHO的推荐标准,相应人群健康风险指数为21.39,是对照区的15.39倍.

英文摘要：

A systematic investigation was carried out on the arsenic content in the soils and plants surrounding Shimen arsenic sulphide mine.The arsenic content in top soils（0-20 cm） was averagely 99.51 mg·kg-1,being 5.34 times higher than that of the background value in Hunan Province and 8.70 times higher than that of local farmland soil.The topsoil arsenic content in paddy field and dry land was 43.51 and 115.1 mg·kg-1,respectively,being 0.45 and 1.87 times higher than that of the grade II level（paddy field 30 mg·kg-1;dry land 40 mg·kg-1） commended by the National Soil Quality（GB 15618-1995）,and the corresponding arsenic exceeding rate was 62.5% and 50.0%,respectively.The arsenic content in edible parts of foodstuff,vegetables,and fruits was 0.16,0.06,and 0.01 mg·kg-1,respectively,and the arsenic exceeding rate of crop samples compared to food security standard ranked in the order of foodstuff vegetables fruits.Rice and sweet potato were relatively seriously contaminated by arsenic.The highest arsenic content of rice was up to 0.84 mg·kg-1,which was 4.6 times higher than that of the National Standard,with the exceeding rate of 62.5%.Statistical analysis demonstrated that there was a positive correlation between the arsenic contents of soil and plant.The average daily intake of arsenic by local people through the consumption of the crops was 6.416 μg·kg-1·d-1,which was much higher than the standard commended by WHO,and the related health risk index was 21.39,which was 14.39 times higher than that in the control region.