Buscar

Estamos realizando la búsqueda. Por favor, espere...

 Detalle_Publicacion

Metal release from contaminated estuarine sediment under pH changes in the marine environment

Abstract: The contaminant release from estuarine sediment due to pH changes was investigated using a modified CEN/TS 14429 pH-dependence leaching test. The test is performed in the range of pH values of 0-14 using deionised water and seawater as leaching solutions. The experimental conditions mimic different circumstances of the marine environment due to the global acidification, carbon dioxide (CO2) leakages from carbon capture and sequestration technologies, and accidental chemical spills in seawater. Leaching test results using seawater as leaching solution show a better neutralisation capacity giving slightly lower metal leaching concentrations than when using deionised water. The contaminated sediment shows a low base-neutralisation capacity (BNCpH 12 = -0.44 eq/kg for deionised water and BNCpH 12 = -1.38 eq/kg for seawater) but a high acid-neutralisation capacity when using deionised water (ANCpH 4 = 3.58 eq/ kg) and seawater (ANCpH 4 = 3.97 eq/kg). Experimental results are modelled with the Visual MINTEQ geochemical software to predict metal release from sediment using both leaching liquids. Surface adsorption to iron- and aluminium- (hydr)oxides was applied for all studied elements. The consideration of the metal-organic matter binding through the NICA-Donnan model and Stockholm Humic Model for lead and copper, respectively, improves the former metal release prediction. Modelled curves can be useful for the environmental impact assessment of seawater acidification due to its match with the experimental values.

 Autoría: Martín-Torre M., Payán M., Verbinnen B., Coz A., Ruiz G., Vandecasteele C., Viguri J.,

 Fuente: Arch Environ Contam Toxicol (2015), 68, 577–587

Editorial: Springer New York

 Fecha de publicación: 01/02/2015

Nº de páginas: 33

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/s00244-015-0133-z

ISSN: 0090-4341,1432-0703

Proyecto español: CTM 2011-28437-C02-01

Url de la publicación: https://doi.org/10.1007/s00244-015-0133-z

Autores/as

MARIA DEL CAMINO MARTIN TORRE

MARIA DE LA CRUZ PAYAN FRAILE

VERBINNEN, BRAM

GEMA RUIZ GUTIERREZ

CARLO HECTOR ARSENE VANDECASTEELE