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    Abstract
2014 (Vol. 6, Issue: 1)
Article Information:

The Effect of Thiosulphate on Arsenic Bioavailability in a Multi Contaminated Soil. A Novel Contribution to Phytoextraction

Gianniantonio Petruzzelli, Francesca Pedron, Eliana Tassi, Elisabetta Franchi, Roberto Bagatin, Gloria Agazzi, Meri Barbafieri and Irene Rosellini
Corresponding Author:  Gianniantonio Petruzzelli 

Key words:  Assisted phytoremediation, chemical additive, metal mobilization, phytoavailability, plant uptake, ,
Vol. 6 , (1): 38-43
Submitted Accepted Published
October 03, 2013 October 21, 2013 January 20, 2014
Abstract:

In this study it was evaluated on a laboratory scale (microcosm), the possibility of using ammonium thiosulphate in assisted phytoextraction for the simultaneous removal of mercury and arsenic from multi-contaminated industrial soil. The species selected were Brassica juncea and Lupinus albus the addition of thiosulfate to the soil greatly promoted the uptake and translocation of both contaminants in the aerial parts of the plants. Mercury concentration in the aerial parts reached in B. juncea 120 mg/kg approximately 40 times the value of the control). The concentration of arsenic also increased significantly in the shoots of B. juncea (14.3 mg/kg), where the value in the control was negligible. Similar trends were obtained for L. albus The results confirmed the known positive effects of thiosulphate in increasing mercury bioavailability for plants, moreover they showed the ability of thiosulphate to mobilize arsenic and significantly to promote its uptake by plants. The increase of arsenic bioavailability, promoted by thiosulfate addition, could be attributed to the competition between arsenate and sulphate ions for the same active sites in the soil surfaces, with the release of arsenic in the soil solution. The use of thiosulfate appears to have great potential since it is a common fertilizer used to promote plant growth and is able to increase the uptake by plants of mercury and arsenic. The simultaneous increase of both contaminants uptake by plants, using a single additive, will provide new insights into the phytoextraction technology in terms of cost and time reduction.
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  Cite this Reference:
Gianniantonio Petruzzelli, Francesca Pedron, Eliana Tassi, Elisabetta Franchi, Roberto Bagatin, Gloria Agazzi, Meri Barbafieri and Irene Rosellini , 2014. The Effect of Thiosulphate on Arsenic Bioavailability in a Multi Contaminated Soil. A Novel Contribution to Phytoextraction.  Research Journal of Environmental and Earth Sciences, 6(1): 38-43.
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ISSN (Online):  2041-0492
ISSN (Print):   2041-0484
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