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1. Mineralisation studies of 14C-labelled metsulfuron-methyl, tribenuron-methyl, chlorsulfuron and thifensulfuron-methyl in one Danish soil and groundwater sediment profile

Author

Søren M. Andersen, R. Bossi, Thomas Holst, Pernille B. Hertz, and Carsten S. Jacobsen

Subjects
Geologic Sediments, Environmental Engineering, medicine.drug_class, Health, Toxicology and Mutagenesis, Metsulfuron-methyl, chemistry.chemical_compound, medicine, Environmental Chemistry, Soil Pollutants, Carbon Radioisotopes, Arylsulfonates, Soil Microbiology, Minerals, Sulfonamides, Herbicides, Triazines, Hydrolysis, Public Health, Environmental and Occupational Health, Sediment, General Medicine, General Chemistry, Pesticide, Pollution, Soil contamination, Sulfonylurea, Biodegradation, Environmental, chemistry, Environmental chemistry, Soil water, Soil horizon, Soil microbiology, Environmental Monitoring
Abstract

Bacterial mineralisation of four sulfonylurea herbicides at 20 microg kg(-1) in a sandy soil from nine different depths in a sandy soil horizon (5-780 cm) was investigated in laboratory studies. Metsulfuron-methyl, chlorsulfuron, and tribenuron-methyl were 14C-labelled in the sulfonamide ring, while thifensulfuron-methyl was labelled in the thiophene ring. The highest mineralised amount in 126 days was observed for metsulfuron-methyl (40%) followed by tribenuron-methyl (25%), and thifensulfuron-methyl (11%). Chlorsulfuron showed low mineralisation in all the soils tested (

Published
2001

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