To evaluate the persistency of the selected model compounds in the environmental matrices air, water, soil and sediment. Reaction mechanisms and degradation pathways of the model compounds are studied. A theoretical approach will be made to arrive at the conceptual […]
Computer models are increasingly used to simulate the behaviour of chemicals in the environment. Based on data on a chemical's properties, release rates and environmental characteristics, these programmes - known as multimedia fate and transport models (MFTM) predict concentrations in […]
The persistence of a chemical in the environment - how resistant it is to being broken down in nature - is hard to predict. Its tendency to build up in living organisms - to bioconcentrate or bioaccumulate - is similarly […]
Existing data on ecotoxicity of chemicals for water, sediment and soil varies widely in quality, quantity, validity, and how representative it is. This is due to environmental concerns having initially focused water, with soil and sediment taken into account only […]
The environmental risk posed by any new chemical produced or used in substantial quantities in the EU had to be assessed. This process involved estimating the concentration of the substance that could be present in water without harming aquatic life. […]
Emissions of man-made chemicals can potentially have an adverse impact on the ecological balance in marine and terrestrial environments. Risk assessments have historically considered the potential for bioaccumulation (transference form the environmental compartment to the organisms) but not the potential […]
The software system will consist of functional modules allowing evaluation of the data stored in a database and various user interface modules. Compounds database will contain chemical structure, identifiers (including CAS numbers), imported descriptors and experimental data. The functional modules […]
The risk assessment of substances to the marine environment is linked with uncertainty due to several reasons, e.g. the marine environment encompasses a higher biodiversity than the freshwater environment. Moreover, the number of toxicity data on marine organisms for the […]
Development of a Sediment Exposure Module as an extension to the GREAT-ER II software. The prediction of sediment concentrations of chemicals in freshwater is a requirement of the EU Risk assessment (EU TGD). The current GREAT-ER software only calculates total […]
Assessment of chemical exposure in sediments is part of the current TGD and is encapsulated in EUSES. In order to convince regulators that GREAT-ER provides an exposure assessment methodology which is at least equivalent to EUSES (in terms of sophistication) […]
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