Abstract

EXAMS 2 was developed by Burns et al. for rapid evaluation of the behavior of organic chemicals in aquatic ecosystems. EXAMS 2 computes from the chemistry and the relevant transport and physicochemical properties of the compound and the ecosystem: Expected environmental concentrations. The fate of chemicals due to transport and transformation processes. The persistence of chemicals in the system once chemical loadings terminate. The program is interactive and allows the user to define and store the properties of the chemicals and environments. Loadings, transport, and transformations are combined into a set of differential equations assuming conservation of mass. Entering and leaving chemical mass into and from the environment is treated as the algebraic sum of external loadings, transport processes that export chemicals from the system, and transformation processes that convert chemicals to their transformation products. Water bodies can be combined via a set of several compartments or distinct zones of ...

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