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TitreAnalytical methods used to characterize the solid-phase speciation of metal(loid)s
TéléchargerTéléchargement (publication entière)
AuteurParsons, M B
SourcePresentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010; par Rencz, A N (éd.); Kettles, I M (éd.); Commission géologique du Canada, Dossier public 6645, 2011 p. 21; 1 CD-ROM, https://doi.org/10.4095/287945
Année2011
ÉditeurRessources naturelles Canada
RéunionWorkshop on the role of geochemical data in environmental and human health risk assessment; Halifax; CA; mars 17-18, 2010
Documentdossier public
Lang.anglais
DOIhttps://doi.org/10.4095/287945
MediaCD-ROM; en ligne; numérique
Référence reliéeCette publication est contenue dans Rencz, A N; Kettles, I M; (2011). Presentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010, Commission géologique du Canada, Dossier public 6645
Référence reliéeCette publication est reliée à Friske, P W B; Ford, K L; Kettles, I M; McCurdy, M W; McNeil, R J; Harvey, B A; (2010). North American soil geochemical landscapes project: Canadian field protocols for collecting mineral soils and measuring soil gas radon and natural radioactivity, Commission géologique du Canada, Dossier public 6282
Référence reliéeCette publication est contenue dans Rencz, A N; Kettles, I M; (2011). Presentations and recommendations from the workshop on the role of geochemical data in environmental and human health risk assessment, Halifax, 2010, Commission géologique du Canada, Dossier public 6645
Formatspdf
ProvinceColombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut
SNRC1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long OENS-141.0000 -50.0000 90.0000 41.7500
Sujetsanalyse environnementales; géochimie du sol; sols; études pédologiques; échantillons de sol; propriétés du sol; levés géochimiques; pédologie; Cénozoïque; Quaternaire
Consultation
Endroit
 
Bibliothèque de Ressources naturelles Canada - Ottawa (Sciences de la Terre)
 
Bibliothèque de Ressources naturelles Canada - Calgary (Sciences de la Terre)
 
Commission géologique du Canada (Atlantique)
 
Bibliothèque de Ressources naturelles Canada - Vancouver (Sciences de la Terre)
 
Bibliothèque de Ressources naturelles Canada - Québec (Sciences de la Terre)
 
ProgrammeEcosystems Risk Characterization, Géoscience de l'environnement
LiensCanadian Database of Geochemical Surveys, downloadable files
LiensBanque de données de levés géochimiques du Canada, fichiers téléchargeables
Diffusé2011 01 01
Résumé(disponible en anglais seulement)
The ecosystem and human health risks associated with metal(loid)s in soils, sediments and mine wastes are strongly influenced by their solid-phase speciation. This presentation will review a range of methods commonly used by geoscientists to measure the various chemical (e.g. oxidation state) and physical (e.g. morphology, particle size) forms of an element which together make up the total concentration of that element in a sample. Traditional macroscopic techniques for determining solid-phase speciation include methods such as sequential chemical extractions, which can be used for indirectly assessing the partitioning of metals in solid materials, and X-ray diffraction (XRD), which can be used to identify crystalline phases. Microscopic methods range from optical techniques (e.g. transmitted and reflected light microscopy) to microbeam methods that are used to determine near-surface compositions (e.g. electron microprobe, laser-ablation ICP-MS, proton-induced X-ray emission (PIXE)). Over the last two decades, many environmental investigations have employed synchrotronbased microscopic methods that can be used to determine the in situ speciation of metal(loid)s in solid materials. With careful sample collection and preparation, techniques such as X-ray absorption fine structure spectroscopy (XAFS) can provide information on metal(loid) oxidation states and coordination environments that are essential for assessing the environmental risks associated with these elements. Recent studies demonstrate that determination of the total concentrations of metal(loid)s in soils, sediments and mine wastes does not give sufficient information on the environmental availability of these elements, or their potential risks to human health. In the future, ecological and human health risk assessments should incorporate information on the solid-phase speciation of metal(loid)s to ensure that realistic management guidelines are established.
GEOSCAN ID287945