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Plants influence on arsenic availability and speciation in therhizosphere, roots and shoots of three different vegetables
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2014 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 184, 540-546 p.Article in journal (Refereed) Published
Abstract [en]

The toxicity of arsenic (As) in the environment is controlled by its concentration, availability andspeciation. The aims of the study were to evaluate the accumulation and speciation of As in carrot,lettuce and spinach cultivated in soils with various As concentrations and to estimate the concomitanthealth risks associated with the consumption of the vegetables. Arsenic concentration and speciation inplant tissues and soils was analysed by HPLC, AAS and XANES spectroscopy. To estimate the plants influencein the rhizosphere, organic acids in lettuce root exudates were analysed by ion chromatography.The results showed that the As accumulation was higher in plants cultivated in soil with higher Asextractability. Arsenate predominated in the soils, rhizosphere and root exudates of lettuce. Succinic acidwas the major organic acid in lettuce root exudates. Ingestion of the tested vegetables may result in anintake of elevated levels of inorganic As.

Place, publisher, year, edition, pages
2014. Vol. 184, 540-546 p.
National Category
Botany Geochemistry
URN: urn:nbn:se:uu:diva-210540DOI: 10.1016/j.envpol.2013.10.003ISI: 000329419200068OAI: oai:DiVA.org:uu-210540DiVA: diva2:663076
Available from: 2013-11-09 Created: 2013-11-09 Last updated: 2014-02-13Bibliographically approved

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