Inorganic arsenic speciation in the waters of the Penzé estuary NW France: Seasonal variations and fluxes to the coastal areaReport as inadecuate




Inorganic arsenic speciation in the waters of the Penzé estuary NW France: Seasonal variations and fluxes to the coastal area - Download this document for free, or read online. Document in PDF available to download.

1 LEMAR - Laboratoire des Sciences de l-Environnement Marin LEMAR 2 CEMCA - Chimie, Electrochimie Moléculaires et Chimie Analytique 3 PROTEE - PROcessus de Transfert et d-Echanges dans l-Environnement - EA 3819

Abstract : Over this one-year study, the variations of inorganic As species were examined monthly along the salinity gradient of the Penzé estuary NW France in relation with different biogeochemical parameters. In most cases, dissolved As exhibited a non-conservative behaviour which resulted from the competition between two major processes. In the upstream section of the estuary, a strong input of both total inorganic As and AsIII occurred. Then, the removal of the same species, under precipitation of iron oxides-oxyhydroxides, was observed in the low-salinity range S < 10. Using our experimental data, the fluxes of the various As species were estimated for the first time in estuarine waters. Inputs from the river were mainly constituted of particulate As w70%. Conversely, dissolved species were predominant in the net fluxes w65% and AsIII accounted for w15% of the dissolved net flux.





Author: Jennifer Vandenhecke - Matthieu Waeles - Jean-Yves Cabon - Cédric Garnier - Ricardo Riso -

Source: https://hal.archives-ouvertes.fr/



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