Alternative dry separation of PM10from soils for characterization by kinetic extraction: example of new Caledonian mining soils.
A simple new device for dry separation of fine particulate matter from bulk soil samples is presented here. It consists of a stainless steel tube along which a nitrogen flow is imposed, resulting in the displacement of particles. Taking into account particle transport, fluid mechanics, and soil sample composition, a tube 6-m long, with a 0.04-m diameter, was found best adapted for PM10separation. The device rapidly produced several milligrams of particulate matter, on which chemical extractions with EDTA were subsequently performed to study the kinetic parameters of extractable metals. New Caledonian mining soils were chosen here, as a case-study. Although the easily extracted metal pool represents only 0.5-6.4 % of the total metal content for the elements studied (Ni, Co, Mn), the total concentrations are extremely high. This pool is therefore far from negligible, and can be troublesome in the environment. This dry technique for fine particle separation from bulk parent soil eliminates the metal-leaching risks inherent in wet filtration and should therefore ensure safe assessment of environmental quality in fine-textured, metal-contaminated soils.
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France. camille.pasquet@univ-nc.nc.
Camille
C
Pasquet
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France.
Peggy
P
Gunkel-Grillon
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France.
Christine
C
Laporte-Magoni
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France.
Arnaud
A
Serres
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France.
Thomas
T
Quiniou
PPME, Université de la Nouvelle-Calédonie, BP R4, 98851, Nouméa Cedex, Nouvelle-Calédonie, France.
François
F
Rocca
UMR 6298, ArTeHis, Université de Bourgogne - Franche Comté - CNRS-Culture, 6 bd Gabriel, Bat. Gabriel, 21000, Dijon, France.
Fabrice
F
Monna
Institut de Physique du Globe de Paris (IPGP), Sorbonne Paris Cité, UMR CNRS 7154, Université Paris Diderot, 1 rue Jussieu, 75013, Paris, France.
Remi
R
Losno
UMR 1402 Ecosys, INRA-AgroParisTech, pôle Ecotoxicologie, Centre de Versailles-Grignon, RD 10, 78026, Versailles Cedex, France.
Folkert
F
van Oort
Université de Bourgogne-Franche Comté, UFR SVTE, 6 bd Gabriel, Bat. Gabriel, 21000, Dijon, France.
Carmela
C
Chateau
D003035:Cobalt / Q000032:analysis* / Q000737:chemistry; D004784:Environmental Monitoring; D007700:Kinetics; D008345:Manganese / Q000032:analysis* / Q000737:chemistry; D008906:Mining; D009510:New Caledonia; D009532:Nickel / Q000032:analysis* / Q000737:chemistry; D052638:Particulate Matter / Q000032:analysis* / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry
D052638:Particulate Matter; D012989:Soil Pollutants; D003035:Cobalt; D008345:Manganese; D009532:Nickel
Dry separation; Dust; EDTA; Kinetic extraction; PM10; Physical modeling; Trace metals; Ultramafic soil
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