Evaluation of arsenic in soils and plant uptake using various chemical extraction methods in soils affected by old mining activities

The aims of this study were to assess arsenic concentrations and solubility in soils, and its uptake by plant species growing in an area strongly affected by mining activities in Murcia (SE, Spain) paying attention to the mineralogical composition of the soils and the relation of the same with the b...

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Bibliographic Details
Published in:Geoderma 2011-01, Vol.160 (3), p.535-541
Main Authors: Martínez-Sánchez, M.J., Martínez-López, S., García-Lorenzo, M.L., Martínez-Martínez, L.B., Pérez-Sirvent, C.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Arsenic
Bioavailability
Bioavailable arsenic
Biological and medical sciences
Chemical extraction methods
Concentration (composition)
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
Extraction
Fundamental and applied biological sciences. Psychology
Mine soils
Mining
Plant uptake
Plants (organisms)
Pollution, environment geology
Sediments
Soils
Solubility
Surficial geology
Uptakes
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Summary:The aims of this study were to assess arsenic concentrations and solubility in soils, and its uptake by plant species growing in an area strongly affected by mining activities in Murcia (SE, Spain) paying attention to the mineralogical composition of the soils and the relation of the same with the bioavailability of this element. For this, extractions were made with several chemical reagents, to determine the bioavailability of the element in different environmental conditions (natural or potential) and, especially, the arsenic bioavailable for the plant uptake. Maximum extraction was achieved using the Mehra and Jackson procedure, while the least effective extractant was an ammonium sulphate solution. The strongest relationship between the As determined by soil chemical extractions and the As measured in plant biomass was found using the oxidisable-organic matter extraction procedure. ► Arsenic behaviour in soils near an old mining site is studied. ► The uptake of arsenic by plants is influenced by soil mineralogy. ► Arsenic in leaves correlates with that mobilized in soils by Mehra and Jackson reagent.
ISSN:0016-7061
1872-6259
DOI:10.1016/j.geoderma.2010.11.001