Soil remediation technology contaminated by heavy metals with a novel TMT-ferric sulfate stabilizer

The stable effect of Lead （Pb）， cadmium （Cd）， arsenic （As） on the heavy metal polluted soils in Chenzhou Hunan were stabilized with a noval stabilizer of TMT-ferric sulfate. The results showed that TMT（aqueous solution containing 15%TMT）decreased the available contents of Pb， Cd more than 60%， but the available contents of As were not decreased. the available contents of Pb，Cd were decreased more than 90% with 35.7 g/kg ferric sulfate and 0.1 L/kg TMT. The available contents of Pb， Cd were decreased significantly with increasing soil water content. 60 days later， the available contents of Pb， Cd were decreased more than 80% and the available contents of As were decreased 60% with 35.7 g/kg ferric sulfate and 0.04 L/kg TMT when the soil water content was 70% of field capacity capacity lasting 60 days..