Microscopy in addition to chemical analyses ...
Document type :
Compte-rendu et recension critique d'ouvrage
Title :
Microscopy in addition to chemical analyses and ecotoxicological assays for the environmental hazard assessment of coal tar-polluted soils
Author(s) :
Lors, Christine [Auteur correspondant]
Centre for Materials and Processes [CERI MP - IMT Nord Europe]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Ponge, Jean-François [Auteur]
Mécanismes Adaptatifs et Evolution [MECADEV]
Damidot, Denis [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]

Centre for Materials and Processes [CERI MP - IMT Nord Europe]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Ponge, Jean-François [Auteur]
Mécanismes Adaptatifs et Evolution [MECADEV]
Damidot, Denis [Auteur]
Laboratoire de Génie Civil et Géo-Environnement (LGCgE) - ULR 4515 [LGCgE]
Journal title :
Environmental Science and Pollution Research
Pages :
2594-2602
Publisher :
Springer Verlag
Publication date :
2018
ISSN :
0944-1344
English keyword(s) :
coal tar
environmental hazard assessment
ecotoxicity
microscopy
pore network
PAHs
Environmental hazard assessment
Ecotoxicity
Pore network
environmental hazard assessment
ecotoxicity
microscopy
pore network
PAHs
Environmental hazard assessment
Ecotoxicity
Pore network
HAL domain(s) :
Sciences de l'environnement/Biodiversité et Ecologie
Sciences du Vivant [q-bio]/Ecologie, Environnement/Ecosystèmes
Sciences du Vivant [q-bio]/Sciences agricoles/Science des sols
Sciences du Vivant [q-bio]/Ecologie, Environnement/Ecosystèmes
Sciences du Vivant [q-bio]/Sciences agricoles/Science des sols
English abstract : [en]
Chemical analysis of soils contaminated with coal tar indicated that most organic compounds, and particularly PAHs, were contained in coarser particles (> 200 μm). Microscopic observations of this fraction, carried out on ...
Show more >Chemical analysis of soils contaminated with coal tar indicated that most organic compounds, and particularly PAHs, were contained in coarser particles (> 200 μm). Microscopic observations of this fraction, carried out on polished sections, reported the presence of organic particles in addition to mineral particles. Some organic particles had a very low porosity, and their microstructure did not evolve during biotreatment. Alternatively, other organic particles had a large porosity composed of an interconnected pore network that was open to coal tar surface and thus in contact with soil water. Interconnected porosity seemed to increase during biotreatment in relation to a decrease in the amount of organic compounds. The amount of open porosity in contact with soil water was expected to increase the desorption rate of PAHs. Consequently, the environmental hazard could depend on the amount of open porosity in addition to chemical properties of organic particles, such as their concentration in PAHs. Thus, microscopy can be complementary to chemical analysis and ecotoxicological assays to assess the best strategy for remediation but also to follow the advancement of a biotreatment.Show less >
Show more >Chemical analysis of soils contaminated with coal tar indicated that most organic compounds, and particularly PAHs, were contained in coarser particles (> 200 μm). Microscopic observations of this fraction, carried out on polished sections, reported the presence of organic particles in addition to mineral particles. Some organic particles had a very low porosity, and their microstructure did not evolve during biotreatment. Alternatively, other organic particles had a large porosity composed of an interconnected pore network that was open to coal tar surface and thus in contact with soil water. Interconnected porosity seemed to increase during biotreatment in relation to a decrease in the amount of organic compounds. The amount of open porosity in contact with soil water was expected to increase the desorption rate of PAHs. Consequently, the environmental hazard could depend on the amount of open porosity in addition to chemical properties of organic particles, such as their concentration in PAHs. Thus, microscopy can be complementary to chemical analysis and ecotoxicological assays to assess the best strategy for remediation but also to follow the advancement of a biotreatment.Show less >
Language :
Anglais
Popular science :
Non
Source :
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