会议专题

Metal availability on tailing heaps after rehabilitation works with soil covers procedure

Metal availability was evaluated in soil samples from tailing heaps after they have been covered with rock and soil, and planted with Casuarina and Eucalyptus spp. Total lead (Pb), cadmium (Cd), zinc (Zn) and arsenic (As) concentrations were in the range 961 1421, 174-1229, 600-1089 and 14-2770mg·kg<-1>, respectively, and the available concentrations varied from 2 to 92% of the total. The most effective procedure for depleting metal availability on the tailing heaps was to cover the wastes with soil from non-metallic mine and irrigate with wastewater, in addition to the introduction of plants (Eucalyptus camaldulensis and Casuarina equisetifolia). A sort of native plants have invaded the tailing areas covered with soil, in contrast to the untreated tailing heaps which have null invasive vegetation and no introduced plant was able to grow.

bioavailability extractable metals immobilization

R. Carrillo G M. C. A. Gonzalez-Chavez J. Cruz D

Edaphology. Campus Montecillo. Colegio de Postgraduados. km 36.5 Carretera Mexico Texcoco, Mexico. 56230

国际会议

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)

北京

英文

894-895

2007-07-15(万方平台首次上网日期,不代表论文的发表时间)