Characterization of the submarine disposal of a Bayer effluent (Gardanne alumina plant, southern France): I. Size distribution, chemical composition and settling rate of particles forming at the outfall

Autor: Nicolas Layglon, Olivier Herlory, Christophe Monnin, Stephanie Jacquet, Benjamin Oursel, Cédric Garnier, Deborah Mille, Aurélie Dufour, Sébastien D'Onofrio, Lars-Eric Heimbürger-Boavida
Přispěvatelé: Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), ANR-11-LABX-0061,OTMed,Objectif Terre : Bassin Méditerranéen(2011), ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011), Géosciences Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), CREOCEAN
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Environmental Engineering
Health
Toxicology and Mutagenesis

0208 environmental biotechnology
Hydrotalcite
02 engineering and technology
010501 environmental sciences
engineering.material
01 natural sciences
Settling
Trace metals
Concretion
Aluminum Oxide
Environmental Chemistry
Seawater
Gardanne alumina plant
Chemical composition
Effluent
0105 earth and related environmental sciences
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere

Outfall
Public Health
Environmental and Occupational Health

General Medicine
General Chemistry
Size distribution
Pollution
Trace Elements
020801 environmental engineering
Plume
13. Climate action
Settling rate
Environmental chemistry
Mediterranean sea
engineering
Environmental science
France
Dispersion (chemistry)
Bayer effluent
Environmental Monitoring
Zdroj: Chemosphere
Chemosphere, 2021, 263, pp.127695. ⟨10.1016/j.chemosphere.2020.127695⟩
Chemosphere, Elsevier, 2021, 263, pp.127695. ⟨10.1016/j.chemosphere.2020.127695⟩
ISSN: 0045-6535
Popis: International audience; The submarine discharge of the high pH clarified Bayer effluent of the Gardanne alumina plant (Marseille region, France) leads to the formation of concretions at the outfall 324 m underwater and to a plume of white particles. The bulk chemical composition of the concretions has been determined by SF-ICP-MS. Mg and Al are the major elements measured with concentrations of a few hundred mg g−1. Ca and S are also found at concentrations in the range of mg g−1. Among the measured trace elements there is a specific interest in As and V because of environmental concerns pointed out by regulation authorities. Their concentrations are of tens to thousands μg g−1, respectively. Concentrations of the other elements are in the range of a few ng g−1 to few hundreds μg g−1. In order to constrain the dispersion of particles in the environment and to understand how chemical elements can be scavenged from or released to seawater, the size distribution of particles composing the concretions has been measured by settling rate experiments and, for each size class of particles, their chemical composition has been determined. For example, As and V are mainly associated to particles with mean diameters between 15.6 and 63 μm and settling rates around 96 m d−1. Overall, all the main elements (Mg, Al, Ca, S) composing concretions are associated to this size class of particles which represents 53–60% of the total concretion mass.
Databáze: OpenAIRE