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Plants influence on arsenic availability and speciation in the rhizosphere, roots and shoots of three different vegetables
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
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 and speciation. 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 concomitant health risks associated with the consumption of the vegetables. Arsenic concentration and speciation in plant tissues and soils was analysed by HPLC, AAS and XANES spectroscopy. To estimate the plants influence in 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 As extractability. Arsenate predominated in the soils, rhizosphere and root exudates of lettuce. Succinic acid was the major organic acid in lettuce root exudates. Ingestion of the tested vegetables may result in an intake of elevated levels of inorganic As.

Place, publisher, year, edition, pages
2014. Vol. 184, 540-546 p.
Keyword [en]
Arsenic, Accumulation, Speciation, Availability, Rhizosphere
National Category
Ecology Environmental Sciences
URN: urn:nbn:se:su:diva-100659DOI: 10.1016/j.envpol.2013.10.003ISI: 000329419200068OAI: diva2:696026
Carl Tryggers foundation Knut and Alice Wallenberg FoundationSwedish Research Council


Available from: 2014-02-12 Created: 2014-02-10 Last updated: 2014-02-12Bibliographically approved

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