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Capacity of Model Biobeds to Retain and Degrade Mecoprop and Isoproturon by Vibeke V Henriksen; Arne Helweg; Niels Henrik Spliid; Gitte Felding; Lars Stenvang is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Abstract Biobeds are used to increase the adsorption and degradation of pesticide spillage on sites used for mixing and loading and for cleaning of sprayers. The adsorption and the rate of degradation of ^14^C‐labelled isoproturon and mecoprop (MCPP) at concentrations from 0.0005 to 25 000 mg kg^−1^ were determined in biobed soil. Further leaching of the two herbicides was determined in a model biobed with a surface area of 2 m2. The biobed material showed enhanced ability to adsorb the two herbicides. __K__~d~ was 5.2 litre kg^−1^ for isoproturon and 1.6 litre kg^−1^ for MCPP in biobed material, which is higher than in natural soil. In different experiments with natural soil, __K__~d~ ranges from 0.07 to 0.6 litre kg^−1^ for MCPP and from 1.5 to 4.6 litre kg^−1^ for isoproturon in soils with varying organic carbon content. Degradation of MCPP was rapid at concentrations from 0.0005 to 500 mg kg^−1^, delayed at 5000 mg kg^−1^, and very slow at 25 000 mg kg^−1^. For isoproturon, the relative degradation was most rapid at the lowest concentration and decreasing with increasing concentrations. After 120 days, between 55% and 8% ^14^C was evolved as ^14^CO~2~ at concentrations betwe

Who reads Capacity of Model Biobeds to Retain and Degrade Mecoprop and Isoproturon?

Author

Vibeke V Henriksen; Arne Helweg; Niels Henrik Spliid; Gitte Felding; Lars Stenvang

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1526-498X)

Published

2003

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)