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

ABSTRACT: 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 time-resolved 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 wit

SUBMITTER: Kulenkampff J 

PROVIDER: S-EPMC5935730 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature