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Title: Environmental hazard of cadmium, copper, lead and zinc in metal-contaminated soils remediated by sulfosuccinamate formulation
Authors: Hernandez-Soriano, Maria del Carmen
Peña, Aranzazu
Mingorance, Maria Dolores # ×
Issue Date: 2011
Publisher: Royal Society of Chemistry
Series Title: Journal of Environmental Monitoring vol:13 issue:10 pages:2830-2837
Abstract: Accumulation of metals in soil at elevated concentrations causes risks to the environmental quality and
human health for more than one hundred million people globally. The rate of metal release and the
alteration of metal distribution in soil phases after soil washing with a sulfosuccinamate surfactant
solution (Aerosol 22) were evaluated for four contaminated soils. Furthermore, a sequential extraction
scheme was carried out using selective extractants (HAcO, NH2OH$HCl, H2O2 + NH4AcO) to
evaluate which metal species are extracted by A22 and the alteration in metal distribution upon
surfactant-washing. Efficiency of A22 to remove metals varied among soils. The washing treatment
released up to 50% of Cd, 40% of Cu, 20% of Pb and 12% of Zn, mainly from the soluble and reduction
soil fractions, therefore, greatly reducing the fraction of metals readily available in soil. Metal
speciation analysis for the solutions collected upon soil washing with Aerosol 22 further confirmed
these results. Copper and lead in solution were mostly present as soluble complexes, while Cd and Zn
2 were present as free ions. Besides, redistribution of metals in soil was observed upon washing. The
ratios of Zn strongly retained in the soil matrix and Cd complexed with organic ligands increased. Lead
was mobilized to more weakly retained forms, which indicates a high bioavailability of the remaining
Pb in soil after washing. Comprehensive knowledge on chemical forms of metals present in soil allows
a feasible assessment of the environmental impact of metals for a given scenario, and possible alteration
of environmental conditions, and a valuable prediction for potential leaching and groundwater
contamination.
Description: The rate of metal release and the alteration of metal distribution in soil phases after soil washing with a sulfosuccinamate surfactant solution (Aerosol 22) were evaluated for four contaminated soils.
ISSN: 1464-0325
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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