Volume 5, Issue 8 (September 2008)

    Development of a Multimedia Model for the Fate Prediction of Hydrocarbon Fluids in Agrochemical Formulations

    (Received 17 December 2007; accepted 22 July 2008)

    Published Online: 2008

    CODEN: JAIOAD

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    Abstract

    Hydrocarbon (HC) fluids are effective inerts in pesticide formulations. These fluids consist of volatile organic compounds (VOCs) that are assumed to be completely volatilized and undergo subsequent atmospheric reaction that may contribute to ozone formation during field use. However, these assumptions are based on laboratory evaporation tests, which fail to account for other environmentally relevant and competitive fate processes, such as biodegradation, soil sorption, runoff, and leaching. If appropriate input parameters are known, or can be reliably estimated, mass balance multimedia models can be used to characterize the importance and uncertainty of various fate processes and provide a more realistic assessment of the potential contribution to ozone formation. A model has been developed and applied to an agricultural field application scenario. Preliminary results suggest biodegradation and soil sorption are significant fate processes that can reduce the mass of HC VOCs entering the atmosphere by volatilization. The implications of applying multimedia models in assessing potential ozone formation from HC fluids in agricultural uses are further highlighted and preliminary laboratory work to confirm model findings is also discussed.


    Author Information:

    Warren, Christopher S.
    ExxonMobil Biomedical Sciences Inc., Annandale, New Jersey

    Parkerton, Tom F.
    ExxonMobil Biomedical Sciences Inc., Annandale, New Jersey

    Rohde, Arlean M.
    ExxonMobil Chemical Company, Houston, Texas

    Prince, Roger C.
    ExxonMobil Biomedical Sciences Inc., Annandale, New Jersey

    Manning, Ryan
    ExxonMobil Biomedical Sciences Inc., Annandale, New Jersey

    Letinski, Dan J.
    ExxonMobil Biomedical Sciences Inc., Annandale, New Jersey


    Stock #: JAI101637

    ISSN: 1546-962X

    DOI: 10.1520/JAI101637

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    Author
    Title Development of a Multimedia Model for the Fate Prediction of Hydrocarbon Fluids in Agrochemical Formulations
    Symposium Pesticide Formulations and Delivery Systems: 28th Symposium, 2007-11-01
    Committee E35