IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Geochemical mobility of arsenic in the surficial waters from Argentina
Autor/es:
ROMERO, MARÍA BELÉN; COSTAS, A.; POLIZZI, PAULA; ROBLES, ALICIA; MEDICI, S.; CHIODI BOUDET, LEILA; GERPE, MARCELA
Revista:
Environmental Earth Sciences
Editorial:
Springer Berlin Heidelberg
Referencias:
Año: 2016 vol. 75 p. 1479 - 1486
ISSN:
1866-6280
Resumen:
The presence of arsenic (As) in surface water constitutes an important environmental risk, where mobility and adsorption processes are responsible for its behavior in the sediment?water interface. Therefore, the assessment of adsorption, mobility and water availability of arsenic in freshwater sediments, with agricultural, livestock and urban soil uses was performed. Arsenic concentrations in sediments ranged from 5.4 to 15.9 mg kg−1 (total) and 2.8 to 6.5 mg kg−1 (labile), and those of iron and manganese were 11,563?23,500 and 140.6?662.1 mg kg−1, respectively. The As levels in water were significantly lower than those of sediments. Results would suggest that As co-precipitation and adsorption on Fe oxides are probably the major route of immobilization, determining its low lability. Manganese did not present an outstanding contribution to the retention, and cation-exchange capacity, pH and organic matter of sediments did not show an influence on the mobility of As.