Phytoextraction of metals and metalloids from contaminated soils.

Abstract:

:The removal of inorganic contaminants by plants is termed phytoextraction. Recent studies have looked at the feasibility of phytoextraction, and demonstrate that both good biomass yields and metal hyperaccumulation are required to make the process efficient. Adding chelating agents to soil to increase the bioavailability of contaminants can sometimes induce hyperaccumulation in normal plants, but may produce undesirable environmental risks. Thus, it is necessary to investigate the mechanisms responsible for hyperaccumulation, using natural hyperaccumulators as model plant species. Recent advances have been made in understanding the mechanisms responsible for hyperaccumulation of Zn, Cd, Ni and As by plants. Attempts to engineer metal tolerance and accumulation have so far been limited to Hg, As and Cd, and although promising results have been obtained they may be some way from practical application. More fundamental understanding of the traits and mechanisms involved in hyperaccumulation are needed so that phytoextraction can be optimised.

journal_name

Curr Opin Biotechnol

authors

McGrath SP,Zhao FJ

doi

10.1016/s0958-1669(03)00060-0

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

277-82

issue

3

eissn

0958-1669

issn

1879-0429

pii

S0958166903000600

journal_volume

14

pub_type

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