6533b820fe1ef96bd12791ac

RESEARCH PRODUCT

Photoinductive efficiency of soil extracted humic and fulvic acids

Claire RichardOleg TrubetskojFrancis AndreuxJean-pierre AguerOlga TrubetskayaJean Lévêque

subject

Environmental EngineeringLightPhotochemistryHealth Toxicology and MutagenesisPopulationChemistry Techniques AnalyticalSoilEnvironmental ChemistryHumic acidBenzopyransOrganic mattereducationUltraviolet radiationHumic SubstancesInitial ratechemistry.chemical_classificationeducation.field_of_studyRadiationChromatographyPhenylurea CompoundsPublic Health Environmental and Occupational HealthGeneral MedicineGeneral ChemistryPollutionSoil contaminationBiodegradation EnvironmentalchemistryEnvironmental chemistrySoil waterPhotochemical degradation

description

Humic and fulvic acids extracted from soils of different genesis were investigated for their ability to photoinduce the transformation of fenuron (2 x 10(-4) mol(-1)) at 365 nm. The ratio of the initial rate of fenuron consumption over the rate of light absorption by humic substances was found to be higher for fulvic acids (range 2.0 x 10(-3) to 9.0 x 10(-5)) than for humic acids (range 1.7 x 10(-4) to - 3.6 x 10(-5)). Within the FAs population, this ratio decreased as the specific absorption coefficient at 365 nm increased. It seems therefore that most of 365-nm absorbing components have no photoinductive activity and even reduce that of photoinductive chromophores.

yearjournalcountryeditionlanguage
2002-10-05Chemosphere
https://doi.org/10.1016/s0045-6535(02)00282-5