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Long-term field metal extraction by pelargonium:phytoextraction efficiency in relation to plant maturity

Shahid, Muhammad and Arshad, Muhammad and Kaemmerer, Michel and Pinelli, Eric and Probst, Anne and Baqué, David and Pradère, Philippe and Dumat, Camille Long-term field metal extraction by pelargonium:phytoextraction efficiency in relation to plant maturity. (2011) International Journal of Phytoremediation, vol. 14 (n°5). pp. 493-505. ISSN 1522-6514

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Official URL: http://dx.doi.org/10.1080/15226514.2011.604689

Abstract

The long length of periods required for effective soil remediation via phytoextraction constitutes a weak point that reduces its industrial use. However, these calculated periods are mainly based on short-term and/or hydroponic controlled experiments. Moreover, only a few studies concern more than one metal, although soils are scarcely polluted by only one element.In this scientific context, the phytoextraction of metals and metalloids (Pb, Cd, Zn, Cu,and As) by Pelargonium was measured after a long-term field experiment. Both bulk and rhizosphere soils were analyzed in order to determine the mechanisms involved in soil-root transfer. First, a strong increase in lead phytoextraction was observed with plant maturity, significantly reducing the length of the period required for remediation. Rhizosphere Pb, Zn, Cu, Cd, and As accumulation was observed (compared to bulk soil), indicating metal mobilization by the plant, perhaps in relation to root activity. Moreover, metal phytoextraction and translocation were found to be a function of the metals’ nature. These results, taken altogether, suggest that Pelargonium could be used as a multi-metal hyperaccumulator under multi-metal soil contamination conditions, and they also provide an interesting insight for improving field phytoextraction remediation in terms of the length of time required, promoting this biological technique.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The definitive version is available at http://www.tandfonline.com/doi/abs/10.1080/15226514.2011.604689#.U0Kkn6JJTxU
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > COMSATS Institute of Information Technology - CIIT (PAKISTAN)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > National University of Sciences and Technology - NUST (PAKISTAN)
Other partners > Société de Traitement Chimique des Métaux - STCM (FRANCE)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Chemical Metal Treatment Company (FRANCE)
Laboratory name:
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Deposited By: Nadia Kelmouss

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