Heavy-Metal Phytostabilizing Potential of Agrostis castellana Boiss. & Reuter

International Journal of Phytoremediation
J PastorAna-Jesús HernÁndez

Abstract

The soils of many abandoned mine sites in the central region of Spain are heavily polluted with a number of different metals. Having frequently found Agrostis castellana growing at these old mine sites, this study was designed to assess its remediation capacity for this type of setting. In an initial field study, plant specimens were collected from 4 abandoned mine sites to determine pollutant concentrations in their roots and shoots. This was followed by a 4-year bioassay in a controlled environment in which soils collected from the mines were used to set up microcosms. Maximum root concentrations of the most polluting elements present in the bioassay were 3625 mg kg(-1) Zn, 2793 mg kg(-1) Cu, 13042 mg kg(-1) Pb, 49 mg kg(-1) Cd and 957 mg kg(-1) As. These concentrations represent root bioaccumulation indices of over 1 and usually >2. In contrast, indices of transfer to above-ground phytomass were always < 1, indicating this species is a good candidate for use as a phytostabilizer. However, the high metal concentrations that could reach the above-ground mass of this plant determines a need for close monitoring and avoiding the use of areas under restoration for hunting or grazing.

References

Apr 20, 2004·Environmental Pollution·H Dahmani-MullerM Balabane
Mar 28, 2006·Environmental Monitoring and Assessment·P MadejónF Cabrera
Aug 8, 2007·Journal of Neurology, Neurosurgery, and Psychiatry·S FauserA Schulze-Bonhage
Feb 5, 2008·Environmental Geochemistry and Health·A J Hernández, J Pastor
Jul 8, 2008·Journal of Hazardous Materials·Eduardo Moreno-JiménezElvira Esteban
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Jul 10, 2012·Environmental Science and Pollution Research International·Shujin ZhangYongdong Wang
Oct 2, 2013·Environmental Science and Pollution Research International·Francesca LangellaErika Kothe

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Citations

Oct 6, 2015·Journal of Environmental Quality·Ana J HernándezJesús Pastor
May 1, 2017·Environmental Science and Pollution Research International·Markéta MayerováTomáš Vaněk
May 24, 2017·Environmental Monitoring and Assessment·A M ShackiraE Nabeesa Salim

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Methods Mentioned

BETA
X-ray
Scanning Electron Microscopy
soil amendments

Software Mentioned

Statgraphics

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