Arsenic and selenium mobilisation from organic matter treated mine spoil with and without inorganic fertilisation

Moreno-Jiménez, Eduardo; Clemente, Rafael; Mestrot, Adrien; Meharg, Andrew A. (2013). Arsenic and selenium mobilisation from organic matter treated mine spoil with and without inorganic fertilisation. Environmental pollution, 173, pp. 238-244. Elsevier Science 10.1016/j.envpol.2012.10.017

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Organic matter amendments are applied to contaminated soil to provide a better habitat for re-vegetation and remediation, and olive mill waste compost (OMWC) has been described as a promising material for this aim. We report here the results of an incubation experiment carried out in flooded conditions to study its influence in As and metal solubility in a trace elements contaminated soil. NPK fertilisation and especially organic amendment application resulted in increased As, Se and Cu concentrations in pore water. Independent of the amendment, dimethylarsenic acid (DMA) was the most abundant As species in solution. The application of OMWC increased pore water dissolved organic-carbon (DOC) concentrations, which may explain the observed mobilisation of As, Cu and Se; phosphate added in NPK could also be in part responsible of the mobilisation caused in As. Therefore, the application of soil amendments in mine soils may be particularly problematic in flooded systems.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Soil Science
08 Faculty of Science > Institute of Geography

UniBE Contributor:

Mestrot, Adrien

Subjects:

900 History > 910 Geography & travel

ISSN:

0269-7491

Publisher:

Elsevier Science

Language:

English

Submitter:

Monika Wälti-Stampfli

Date Deposited:

17 Jan 2014 09:59

Last Modified:

08 Jun 2016 07:58

Publisher DOI:

10.1016/j.envpol.2012.10.017

Uncontrolled Keywords:

Arsenic speciation, Biogeochemical cycles, Pore water, Metals, Air trapping

BORIS DOI:

10.7892/boris.39651

URI:

https://boris.unibe.ch/id/eprint/39651

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