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Time-lapse 3D imaging by positron emission tomography of Cu mobilized in a soil column by the herbicide MCPA

Kulenkampff, Johannes; Stoll, Madeleine; Gründig, Marion; Mansel, Alexander; Lippmann-Pipke, Johanna; Kersten, Michael

Phenoxyalkanoic acids like the 4-chloro-2-methylphenoxyacetic acid (MCPA) are the second highest used xenobiotic herbicides worldwide after glyphosate because of their apparently favorable environmental properties. Experimental batch equilibration data suggested a reduced Cu adsorption efficiency with the soil mineral goethite below pH 6 in presence of MCPA. This has been verified by advanced surface complexation adsorption modelling involving dissolved Cu-MCPA complexation constants. Positron emission tomography is a non-invasive molecular imaging method for timeresolved three-dimensional information commonly applied on non-retarded tracers in soil core scale experiments. Mineral surface reactive tracers like Cu-64 are too immobile for the relatively short observation times available with this advanced imaging technique. However, Cu-64 radiolabeled Cu-MCPA complex migration could be observed in as long as 10-cm artificial soil test columns where breakthrough occurred within a few days. For the first time, time-lapse movies of Cu migration in the opaque soil columns were recorded using this novel reactive transport process tomograph ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000083290
Veröffentlicht am 06.06.2018
DOI: 10.1038/s41598-018-25413-9
Zitationen: 3
Web of Science
Zitationen: 3
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000083290
HGF-Programm 32.01.02 (POF III, LK 01)
Erschienen in Scientific reports
Band 8
Heft 1
Seiten Art. Nr.: 7091
Vorab online veröffentlicht am 04.05.2018
Nachgewiesen in Web of Science
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