The effectiveness of heavy metals in soil with element sulfur
Abstract： The oxidation and reduction of heavy metals in soil involves both chemical and microbial process. Microbial oxidation and reduction of S, the necessary nutriment and considered as the minimum risk acidification, may influence changes in Cu and Zn solubility, toxicity and bioavailability, either through direct oxidation of metal sulfides or indirectly by the release of metal complexing agents into the soil solution. Knowledge of how heavy elements affected by sulfides and element sulfur, is an important factor in understanding their biogeochemical cycling in soil and high efficient combined bioremediation technology for soil metal pollution.This paper describes the effectiveness of heavy metals in soil with element sulfur, and introduced the extraction of heavy metals in soil and determination the content of heavy metals in soil. A pot experiment was conducted to study the influence of elemental sulphur on solubility of soil Cu, Zn and Pb and uptake by rice. The result showed that with S application soil pH decreased and the effectiveness of the Zn and Cd was significantly increased, but the effectiveness of Pb had no significant influence.
Keywords：Elemental sulphur; Effectiveness; Cu; Zn; Pb; Uptake; Rice
