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dc.contributor.authorEnell, Anja
dc.contributor.authorLundstedt, Staffan
dc.contributor.authorArp, Hans Petter Heinrich
dc.contributor.authorJosefsson, Sarah
dc.contributor.authorCornelissen, Gerard
dc.contributor.authorWik, Ola
dc.contributor.authorKleja, D. Berggren
dc.date.accessioned2017-09-25T13:54:34Z
dc.date.available2017-09-25T13:54:34Z
dc.date.created2016-10-06T12:53:33Z
dc.date.issued2016
dc.identifier.citationEnvironmental Science and Technology. 2016, 50 (21), 11797-11805.nb_NO
dc.identifier.issn0013-936X
dc.identifier.urihttp://hdl.handle.net/11250/2456594
dc.description.abstractDifferent methods to quantify soil porewater concentrations of contaminants will provide different types of information. Passive sampling measurements give freely dissolved porewater concentrations (Cpw,free), while leaching tests provide information on the mobile concentration (Cpw,leach), including contaminants associated with dissolved organic carbon (DOC) and particles/colloids in the porewater. This study presents a novel combination of these two measurements, to study the sorption and mobility of polycyclic aromatic compounds (PACs) to DOC and particulate organic carbon (POC) in 10 historically contaminated soils. The PACs investigated were polycyclic aromatic hydrocarbons (PAHs), oxygenated-PAHs, and nitrogen containing heterocyclic PACs. Observed Cpw,leach was up to 5 orders of magnitude higher than Cpw,free; implying large biases when Cpw,leach is used to assess bioavailability or soil partitioning. Sorption of PACs to DOC and POC was important for the mobility of compounds with log KOW > 4. Average DOC/water-partitioning coefficients (KDOC) correlated well with KOW (log KDOC = 0.89 × log KOW +1.03 (r2 = 0.89)). This relationship is likely more accurate for historically contaminated soils than previously published data, which suffer from artifacts caused by problems in measuring Cpw,free correctly or not using historically contaminated soils. POC/water-partitioning coefficients (KPOC) were orders of magnitude larger than corresponding KDOC, suggesting sorption to mobile particles/colloids is the dominant mechanism for PAC mobility.nb_NO
dc.language.isoengnb_NO
dc.titleCombining Leaching and Passive Sampling to Measure the Mobility and Distribution between Porewater, DOC and Colloids of Native Oxy-PAHs, N-PACs and PAHs in Historically Contaminated Soilnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.pagenumber11797-11805nb_NO
dc.source.volume50nb_NO
dc.source.journalEnvironmental Science and Technologynb_NO
dc.source.issue21nb_NO
dc.identifier.doi10.1021/acs.est.6b02774
dc.identifier.cristin1389921
dc.relation.projectNorges forskningsråd: 231736nb_NO
cristin.unitcode192,0,0,0
cristin.unitnameNorges miljø- og biovitenskapelige universitet
cristin.ispublishedfalse
cristin.fulltextoriginal
cristin.qualitycode2


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