6533b86cfe1ef96bd12c8c65
RESEARCH PRODUCT
A model for the formation and degradation of bound residues of the herbicide 14C-isoproturon in soil
J.c. MunchS. ReuterM. IlimFrancis AndreuxI. Scheunertsubject
Environmental EngineeringHealth Toxicology and MutagenesisOligomerchemistry.chemical_compoundSoil PollutantsEnvironmental ChemistryHumic acidOrganic matterCarbon RadioisotopesHumic Substanceschemistry.chemical_classificationMethylurea CompoundsAqueous solutionHerbicidesPhenylurea CompoundsPesticide ResiduesPublic Health Environmental and Occupational HealthGeneral MedicineGeneral ChemistryMineralization (soil science)BiodegradationPollutionSoil contaminationBiodegradation EnvironmentalMonomerchemistryEnvironmental chemistrydescription
Abstract The humic monomer catechol was reacted with 14 C-isoproturon and some of its metabolites, including 14 C-4-isopropylaniline, in aqueous solution under a stream of oxygen. Only in the case of 14 C-4-isopropylaniline, incorporation in oligomers, in fulvic acid-like polymers, and in humic acid-like polymers was observed. The main oligomer was identified by mass spectrometry as 4,5-bis-(4-isopropylphenylamino)-3,5-cyclohexadiene-1,2-dione. Oligomers and polymers containing bound 14 C-4-isopropylaniline were subjected to biodegradation studies in a loamy agricultural soil during 55 days by quantifying 14 CO 2 evolved. In all cases, significant mineralization rates could be determined, which, however, were much smaller than those of free 14 C-isoproturon and free 14 C-4-isopropylaniline in the same soil.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-08-01 | Chemosphere |