Copper distribution and toxicity in agricultural soils of the Aconcagua fiver basin, Chile

摘要：

A total of 104 topsoils were sampled at varying distances from copper mining industries in the Aconcagua river basin (north-central Chile). Salt- extractable (0.1 M KNO<,3>) and total soil copper concentrations were determined. In the areas where mining was absent, the total copper concentrations were in the range of 70-160mg/kg. Very large (above 700mg/kg, with the maximum of 3400mg/kg) and heterogeneously distributed copper concentrations were generally observed near mining activities or in areas where mining activities are located nearby upstream. On the other hand, the earthworm Eisenia fetida exhibited decreased co-coon production following eight-week exposition to the studied soils, indicating the existence of chronic toxicity. Reduction in co-coon production was better related to the total rather than to the salt-extractable concentrations of copper in the soils. About 18％ of the studied soils may have potentially toxic characteristics that would limit the development of soil macrofauna.

关键词： agriculture mining organism toxicity testing earthworm Eisenia fetida

作者: Alexander Neaman Rodrigo Aguilar Gonzalo Aila Hernan Gaete Marco Cisternas

作者单位: School of Agronomy, Catholic University of Valparaio, Quillota, Chile Department of Biology and Environmental Sciences, University of Valparaio, Valparaio, Chile

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 643-644

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）