Metal-binding particles alleviate lead and zinc toxicity during seed germination of metallophyte grass Astrebla lappacea

Rossato, L., MacFarlane, J., Whittaker, M., Pudmenzky, A., Doley, D., Schmidt, S. and Monteiro, M. J. (2011) Metal-binding particles alleviate lead and zinc toxicity during seed germination of metallophyte grass Astrebla lappacea. Journal of Hazardous Materials, 190 1-3: 772-779. doi:10.1016/j.jhazmat.2011.03.116


Author Rossato, L.
MacFarlane, J.
Whittaker, M.
Pudmenzky, A.
Doley, D.
Schmidt, S.
Monteiro, M. J.
Title Metal-binding particles alleviate lead and zinc toxicity during seed germination of metallophyte grass Astrebla lappacea
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
Publication date 2011-06-15
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2011.03.116
Volume 190
Issue 1-3
Start page 772
End page 779
Total pages 8
Place of publication Netherlands
Publisher Elsevier BV
Collection year 2012
Language eng
Formatted abstract
Combining metal-binding particles and metal-tolerant plants (metallophytes) offers a promising new approach for rehabilitation of heavy metal contaminated sites. Three types of hydrogel metal-binding polymer particles were synthesized and their effects on metal concentrations tested in vitro using metal ion solutions. The most effective of the tested polymers was a micron-sized thiol functional cross-linked acrylamide polymer which reduced the available solution concentrations of Pb2+ (9.65mM), Cu2+ (4mM) and Zn2+ (10mM) by 86.5%, 75.5% and 63.8%, respectively, and was able to store water up to 608% of its dry mass. This polymer was not toxic to seed germination. In deionised water, it enhanced seed germination, and at otherwise phytotoxic Pb2+ (9.65mM) and Zn2+ (10mM) concentrations, it allowed normal germination and root elongation of the metallophyte grass Astrebla lappacea. We conclude that the polymer has the potential to facilitate restoration of heavy metal contaminated lands by reducing the concentration of metal cations in the soil solution and improving germination rates through reduced toxicity and enhanced plant water relations.
Keyword Hydrogel
Metal toxicity
Metal-binding particles
Metallophytes
Remediation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Tue, 24 May 2011, 18:45:33 EST by Dr Laurence Rossato on behalf of Centre For Mined Land Rehabilitation