WP4: Exposure

4.1. Develop models for estimating the effects of environmental change on the fate of chemicals in the aquatic and soil environments and uptake into organisms with different traits.

4.2 Develop new models for estimating changes in human exposure to chemicals via crop items resulting from an increase in wastewater re-use systems.

4.3 Develop an exposure modelling framework for estimating concentrations of emerging contaminants in river basins, drinking water and fish/shellfish, now and in the future.

Description of Work and Role of Specific Beneficiaries / Partner Organisations

Environmental change will alter the fate and transport of chemicals in the environment which will have knock-on effects on exposure concentrations. Wastewater use practices are also likely to change. Existing exposure modelling approaches have not been designed to cope with environmental change. Therefore, in this WP, we will develop and parameterise modelling frameworks for estimating concentrations of chemicals in surface waters and drinking water and in associated food items (crops, fish and shellfish) in the future. The model parameterisation work will be performed by ESRs 4 and 5 at the UoY and HU. Work at the UoY will involve laboratory-based investigations to explore the effects of key environmental change parameters (temperature, pH, DOC and sediment TOC) on the sorption, persistence, uptake and metabolism of case study compounds in aquatic and soil systems. These data will be used to develop models for estimating the effects of environmental change on fate and uptake. Experimental work at HU, will explore the fate and behaviour of chemicals in water re-use systems. These data will be used to develop crop uptake and exposure models for wastewater re-use systems. SU (ESR6) will develop an exposure modelling framework for estimating exposure concentrations of emerging contaminants in river basins, drinking water for current and future conditions. By combining the parameterisation work with the modelling frameworks and emissions scenarios developed in WP3 (Scenarios), we will provide the exposure information required for the risk assessment work performed in WP5 (Effects).

Description of Deliverables

4.1            Modelling approaches for estimating the effects of key environmental change parameters on the fate and uptake of chemicals

4.2            Crop uptake models and human exposure models for contaminants in water reuse systems

4.3            Exposure modelling framework for estimating effects of environmental change on chemical exposure in river basins and drinking waters.

4.4            Future ecological and human exposure scenarios for chemical contaminants