title: Arsenic and selenium mobilisation from organic matter treated mine spoil with and without inorganic fertilisation.
abstract: 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.
authors.affiliation: Department of Agricultural Chemistry, Universidad Autónoma de Madrid, 28049 Madrid, Spain. eduardo.moreno@uam.es
authors.forename: Eduardo
authors.initials: E
authors.lastname: Moreno-Jiménez
authors.forename: Rafael
authors.initials: R
authors.lastname: Clemente
authors.forename: Adrien
authors.initials: A
authors.lastname: Mestrot
authors.forename: Andrew A
authors.initials: AA
authors.lastname: Meharg
mesh_terms: D001151:Arsenic / Q000032:analysis / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005308:Fertilizers / Q000032:analysis; D008906:Mining; D010710:Phosphates / Q000737:chemistry*; D012643:Selenium / Q000032:analysis / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*
chemical_list: D005308:Fertilizers; D010710:Phosphates; D012989:Soil Pollutants; D012643:Selenium; D001151:Arsenic