Review of research progress on the remediation technology of mercury contaminated soil

Among heavy metals which contaminate soil, mercury has caused the attention of environmentalists because of its properties of wide spreading and high toxicity. Moreover, along with the development of modern industry, a great amount of mercury has been discharged into soil. This not only poses great threat on environmental security, but also puts forward urgent requirements for soil remediation. In combination with the research status of soil remediation, the origin and main species of mercury in contaminated soil are introduced. Remediation methods such as soil washing, soil stabilization/solidification, heat treatment, electrokinetic remediation, nanotechnology and biological techniques are systematically reviewed. The development prospect is put forward as a result, providing effective reference for environmentalists.