Advance of phytoremediation on soils polluted by heavy metal

Soil pollution by heavy metal has become a global problem urgently needed to be solved. A recent developed technology called phytoremediation uses green plant to stabilize or extract heavy metals in soil to make them less harmful to environment.Compared with traditional technology for recovery of polluted soil by heavy metals,this technology has such advantages as lower cost ?protecting environment and easily acceptable to public,due to which the technology has caught much attention from scientific field. Details about phytoremediation of type and mechanism of the technology,advantage and disadvantage, application of gene technology in improving remediation ability and so are introduced greatly in this paper.Also,a probe to the future development of the technology is made.