Research progress analysis of hyperaccumulators and fast-growing trees based on the objective of remediation for heavy metals contaminated soil

Phytoremediation is a green,economic and feasible practical technology for remediation of heavy metals contaminated soil,and selecting the targeted remediation species is the key point of phytoremediation.At present, lots of studies were carried out on the herbaceous and woody plant repair technology.However,the comparative analysis on their remediation ability and scientific mechanism as well as technology application are quite lack.This paper reviews both advantages and disadvantages of hyperaccumulator plants and fast-growing trees in remediation of heavy metals,which focus on the stress tolerance,absorption and transport capacity,external strengthening technology,cost of economic and technological,environment risk and subsequent processing technology.This review could provide scientific reference on phytoremediation of heavy metals contaminated soils for future studies.