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Title: The behaviour of atrazine and simazine within the chalk aquifer : experimental results and interpretation
Author: S.N. Needham
Author: D.N. Lerner
Document Type: Monograph
The triazine herbicides, notably atrazine and simazine are the most commonly detected pesticide in ground waters from North America and Europe. Surveys by Anglian Water have revealed detections of atrazine in 28% and simazine in 9% of Chalk ground water samples (Croll, 1992). Understandably water companies are concerned with the detection rates for atrazine especially as its usage within UK agriculture is very low and the high cost of treatment facilities required to reduce concentrations to below the EC MAC. Typical concentrations found in public water supply boreholes are below 0.3microg/l, with maximum concentrations just above 1 microg/l (Croll, 1992). This research project investigated why these two herbicides are so commonly found within the Chalk aquifer. The project used laboratory experiments to provide data on the sorption, degradation and diffusion of these chemicals. The results from these experiments will be related to field conditions during modelling exercises in order to evaluate the mobility and persistence within the aquifer.
Publisher: National Rivers Authority
Publication Date: 1995
Publication Place: Peterborough
Subject Keywords: Chalk streamsHerbicidesAquifersExperimentationAtrazineModellingChemical contaminationDiffusionFlow rateSorptionGroundwaterDegradation
Geographic Keywords: NorfolkSuffolk
Extent: 32; + appendices
Total file downloads: 254

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