Characteristics and Significance of Cadmium Environmental Geochemistry in Soil of Dawu River Basin in the Dexing Copper Orefield
详细信息
- 责任者：Wang Xiaoliang (School of the Earth Science and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhao Yuanyi
- 刊名：Geological Review
- 出版年：2013
- 卷期：59(4)
- 关键词：环境地球化学 ; environmental geochemistry ; 镉 ; cadmium ; 江西 ; Jiangxi Province
- 页码：p.781-788
- 图表：illus., 3 tables, 31 refs.
- 分类号：1800
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
The speciations of Cd element are analyzed and the environmental geochemical characteristics of Cd are studied by using sequential extraction procedure and the mathematical model of delayed geochemical hazard (DGH) in the soil of the Dawu River of the Dexing Copper orefield, Jiangxi Province. The results show, total concentration of active specie of Cd(TCASCd) increased when total releasable content of the pollutant of Cd(TRCPCd) increased in the soil of Dawu upper river where is closed to Zhujiacun and Dawu middle river where is closed to hospital of Dexing copper field,and there is a linear relationship between them.Although samples in the soil of the Dawu upper river and middle river are under the national three level soil standard, the pollution caused by this kind of circumstance which should get more attention than the pollution caused by delay geochemical hazard along with Cd element is constantly input to soil of this region .The data characteristics of soil in the Dawu lower river where is closed to Xiagukoucun accord to DGH characteristics.Cd element in the soil of the Dawu lower river tends to shift from release of TRCPCd to that of TCASCd , and its DGH model was y=1.12167E-04x3-6.25584E-02x2+1.15298E+01x-6.07452E+02, The calculation for outbreak of critical point TRCPCd = 185.90 ng/g , about 36% of samples the DGH of Cd element is very likely to break out in the soil sampling profile of the Dawu lower river which is closed to Xiagukoucun; meanwhile, this viewpoint is of great significance to early-warning of soil Cd pollution and improvement of ecological environment in the study area.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |