• Treffer 39 von 44
Zurück zur Trefferliste

Column leaching tests on soils containing less investigated organic pollutants

  • Column tests are a common tool to investigate the leaching behavior of contaminated soil and waste materials. In contrast to inorganic analytes, fewer studies with organic contaminants are available based on column tests. This paper is aimed at the question if soil materials contaminated with organic pollutants can be reliably investigated by column tests. Soils contaminated with TPH (total petrol hydrocarbons), PFC (perfluorinated surfactants) and the biocide tebuconazole were used for column percolation tests. Differences in the leaching behavior are mainly driven by partitioning behavior between organic carbon and water, which can be estimated from log KOW values and size and shape of molecules. PFC show higher release (10–50% for individual compounds) than pesticides (3.7–5.3%) and TPH (< 1%) at liquid to solid ratio of 4 l/kg. All eluate concentrations are low with maximum concentrations of 50 µg/l for PFC and 1–2 mg/l for pesticides and TPH. Despite this, the observed standardColumn tests are a common tool to investigate the leaching behavior of contaminated soil and waste materials. In contrast to inorganic analytes, fewer studies with organic contaminants are available based on column tests. This paper is aimed at the question if soil materials contaminated with organic pollutants can be reliably investigated by column tests. Soils contaminated with TPH (total petrol hydrocarbons), PFC (perfluorinated surfactants) and the biocide tebuconazole were used for column percolation tests. Differences in the leaching behavior are mainly driven by partitioning behavior between organic carbon and water, which can be estimated from log KOW values and size and shape of molecules. PFC show higher release (10–50% for individual compounds) than pesticides (3.7–5.3%) and TPH (< 1%) at liquid to solid ratio of 4 l/kg. All eluate concentrations are low with maximum concentrations of 50 µg/l for PFC and 1–2 mg/l for pesticides and TPH. Despite this, the observed standard deviations are quite small suggesting good repeatability. In general the observed concentration trends are similar to that from lysimeter studies found in the literature and thus, it can be concluded that laboratory column experiments are a reliable tool for organic compounds with various physico-chemical properties.zeige mehrzeige weniger

Volltext Dateien herunterladen

  • 1-s2.0-S0375674214002167-main.pdf
    eng

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar
Metadaten
Autoren/innen:Ute Kalbe, Nicole Bandow, Andrea Bredow, Helena Mathies, Christian Piechotta
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Journal of geochemical exploration
Jahr der Erstveröffentlichung:2014
Organisationseinheit der BAM:1 Analytische Chemie; Referenzmaterialien
4 Material und Umwelt
4 Material und Umwelt / 4.1 Biologische Materialschädigung und Referenzorganismen
4 Material und Umwelt / 4.3 Schadstofftransfer und Umwelttechnologien
1 Analytische Chemie; Referenzmaterialien / 1.0 Abteilungsleitung und andere
Verlag:Elsevier
Verlagsort:Amsterdam [u.a.]
Jahrgang/Band:147
Ausgabe/Heft:Part B
Erste Seite:291
Letzte Seite:297
Freie Schlagwörter:Column percolation leaching; Perfluorinated surfactants; Pesticides; Total petrol hydrocarbons
DOI:https://doi.org/10.1016/j.gexplo.2014.06.014
ISSN:0375-6742
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:04.12.2014