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BIOSPEC Report Summary

Project ID: EVK1-CT-2001-00086
Funded under: FP5-EESD
Country: Denmark

Framework for analysis of dynamic speciation and bioavailability of metals in aquatic systems

A dynamic approach to metal ion speciation analysis in aquatic ecosystems is essential for development of a rigorous basis for predictions of bioavailability and for reliable risk assessment strategies. A given sensor for speciation analysis is characterised by an effective response time that defines the metal species it is able to measure, i.e. its kinetic window.

We present a common dynamic interpretation framework, based on rigorous flux expressions, for a suite of sensors that span a range of response times. The coherence and complementarily of the attainable information is assessed by measurements on well-defined metal-NTA systems. Interpolation from a kinetic spectrum of speciation analysis information is proposed as a practical strategy for addressing questions of bioavailability.

This result has been submitted for publication in the international peer-reviewed scientific journal, Environmental Science & Technology. The information will allow any interested end users (e.g. other researchers, water quality monitoring agencies, etc.) to apply our approach.


Raewyn M. TOWN, (Professor of Environmental Chemistry)
Tel.: +45-655-02503
Fax: +45-661-58760
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