摘要
凡口铅锌尾矿废弃地的不同区位及不同深度的尾矿中铅锌含量存在着较大的差异 ,总锌为 70 3～ 19657mg/ kg、总铅 10 4 13～ 94 988mg/ kg。正常尾矿中 ,有效态锌含量达到 151.6～ 84 1.7mg/ kg,有效态铅含量很低 ( 0 .75～ 2 .50 mg/ kg) ,有机质、总氮、有效磷及速效钾等营养物质缺乏。当尾矿酸化后 ,p H降低 ,有效态 Pb、Zn含量升高 ,有效锌达到 175.8～ 2 82 8.0 mg/ kg,有效铅含量最高为 10 0 .0 mg/kg,而有机质、总氮和有效磷为零 ,使尾矿更加贫瘠。在尾矿库的边缘区位和尾矿表面的覆盖土壤区位 ,基质中营养物质含量增加 ,但是营养状况的改善又引起了有效态的 Pb、Zn含量升高。
The concentrations of lead and zinc in tailings in the Fankou disposal ground vary sharply with location in place and depth. The concentration of total zinc ranges from 703 to 19 657 mg/kg and that of total lead from 10 413 to 94 988 mg/kg. Normally the tailings contain as high as 151.6-841.7 mg/kg of available zinc and as low as 0.75-2.50 mg/kg of available lead, and are lack of other plant nutrients such as organic matter, total N, available P and readily available K. After be acidified, the pH value of the tailings is lowered down and the concentrations of available Pb and Zn rise, reaching as high as 175.8-2 828.0 mg/kg and 100.0 mg/kg, respectively, while the other plant nutrients fall almost to nil, making the tailings more infertile. In soils of the rims of the disposal ground and the coverings of the tailings, the content of plant nutrients is increased, which, however, also leads to higher concentrations of available Pb and Zn.
出处
《农村生态环境》
CSSCI
CSCD
2000年第4期36-39,44,共5页
Rural Eco-Environment
基金
国家自然科学基金!资助项目 (编号 :39470 146 )
关键词
铅锌矿
尾矿
重金属
化学性质
废弃地
生态恢复
chemical properties, Guangdong, lead zinc mine, Renhua County, taili
