| 贵州汞矿矿区不同位置土壤中总汞和甲基汞污染特征的研究 |
| 摘要点击 2459 全文点击 1597 投稿时间：2005-04-14 修订日期：2005-07-15 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 土壤 总汞 甲基汞 汞矿山活动 贵州 |
| 英文关键词 soils total mercury methylmercury Hg-mined activities Guizhou |
|
| 中文摘要 |
| 为了深入理解汞矿矿区土壤中总汞和甲基汞的污染特征,应用AAS、GC-CVAFS方法,分别对贵州万山、务川和滥木厂汞矿矿区不同位置土壤以及对照区土壤中的总汞(THg)和甲基汞(MeHg)进行了测定.结果表明,万山汞矿区土壤THg和MeHg含量范围分别为1.1～790 mg·kg-1和0.19～15μg·kg-1,务川汞矿区土壤THg和MeHg含量范围分别为0.33～317mg·kg-1和0.41～20μg·kg-1,滥木厂汞矿区土壤THg和MeHg含量范围分别为0.41～610 mg·kg-1和0.70～8.8μg·kg-1.对照区土壤汞含量明显低于矿区土壤,其THg和MeHg含量范围分别为0.14～1.2 mg·kg-1和0.09～0.23μg·kg-1;对照区土壤THg含量接近或稍高于全球背景土壤THg含量0.01～0.5 mg·kg-1.研究表明,汞矿区稻田土壤具有较强的汞甲基化能力,其MeHg含量明显高于菜地和旱田土壤;万山汞矿区土壤汞污染程度明显高于滥木厂和务川汞矿区土壤汞污染. |
| 英文摘要 |
| To investigate mercury pollution in soils from Hg-mined areas,total mercury(THg) and methylmercury(MeHg) were measured in soil samples collected from Hg-mined areas and control sites in Wanshan,Wuchuan and Lanmuchang Hg-mines in Guizhou,by using AAS and GC-CVAFS methods,respectively.Analytical data show that THg and MeHg concentrations range from 1.1 to 790 mg·kg-1 and 0.19 to 15 μg·kg-1 in Wanshan,from 0.33 to 317 mg·kg-1 and 0.41 to 20 μg·kg-1 in Wuchuan,and from 0.41 to 610 mg·kg-1 and 0.70 to 8.8 μg·kg-1 in Lanmuchang,respectively.However,THg and MeHg concentrations in soils from control sites are lower than those obtained from mining areas ranging from 0.14 to 1.2 mg·kg-1 and 0.09 to 0.23(μg·kg-1,) respectively.THg concentrations in soils from control sites are comparable to or slightly higher than that in background soils worldwide which varied between 0.01 and 0.5 mg·kg-1.Results show that soils from paddy fields exhibit higher ability of methylation than that of vegetable and corn fields.Higher mercury pollution in soils from Wanshan Hg mines than those found in soils from Lanmuchang and Wuchuan Hg mines. |
|
|
|
