Effect of different soil textures on leaching potential and degradation of pesticides in biobeds

Journal of Agricultural and Food Chemistry
Paul FoggAndrew Jukes

Abstract

Biobeds can be used to intercept pesticide-contaminated runoff from the mixing/washdown area, creating optimum conditions for sorption and biodegradation such that the amount of pesticide reaching adjacent water bodies is significantly reduced. The biobed is built on the farm using locally available materials, which include, straw, compost, and topsoil. The topsoil acts as the inoculum for the system and is likely to vary in terms of its physical, chemical, and microbiological characteristics from one farm to another. This study therefore investigated the effects of using different soil types on the degradation and leaching potential from biobeds. Three contrasting topsoils were investigated. Leaching studies were performed using isoproturon, dimethoate, and mecoprop-P, which were applied at simulated disposal rates to 1.5 m deep biobeds. Annual average concentrations were similar for each soil type with leaching losses of even the most mobile (Koc = 12-25) pesticide <1.64% of the applied dose. Greater than 98% of the retained pesticides were degraded in all matrices. Degradation studies investigated the persistence of individual pesticides and pesticide mixtures in the different matrices. DT50 values for isoproturon, chlorotha...Continue Reading

References

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Citations

May 13, 2010·Environmental Monitoring and Assessment·Hua WangQingfu Ye
Jul 30, 2010·Journal of Agricultural and Food Chemistry·Evangelos KaranasiosConstantinos Ehaliotis
Jul 4, 2006·Chemosphere·Niels Henrik SpliidKirsten Heinrichson
Jan 3, 2007·Pest Management Science·Tineke De WildePeter Jaeken
Apr 24, 2013·FEMS Microbiology Letters·Carlos E Rodríguez-RodríguezKarla Ruiz-Hidalgo
Feb 27, 2009·Journal of Environmental Quality·M Sonia Rodríguez-CruzM Jesús Sánchez-Martín
Jul 5, 2008·Journal of Agricultural and Food Chemistry·María del Pilar CastilloJohn Stenström

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