Abstract:

Based on biogeochemistry cycle theory, the paper constructed a bioremediation time effect model of heavy metals in the soil by plant, and we used Pinus massoniana plantation as an example which was successfully used in Chengdu Plain, five geochemical pollution elements (As, Hg, Pb, Al and Cd) in the soil material, soil, plants and litters were investigated. Accordingly, a warning model of the forest eco geochemical was developed. The simulation results showed that the phytoremediation capabilities of P. massoniana forest for soil pollution elements of As、Hg、Pb、Al、Cd were great, especially for Pb and Al, The contaminated soil with the heavy metals would be completely purified by the plantation in a period of time.

Key words: Pinus massoniana, soil, heavy metal, bioremediation, early warning model