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Dynamic speciation analysis and bioavailability of metals in aquatic systems.

van Leeuwen, Herman P. and Town, Raewyn and Buffle, Jacques and Cleven, Rob F. M. and Davison, William and Puy, Jaume and van Reimsdijk, Willem H. and Sigg, Laura (2005) Dynamic speciation analysis and bioavailability of metals in aquatic systems. Environmental Science & Technology, 39 (22). pp. 8545-8556. ISSN 0013-936X

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Abstract

Dynamic metal speciation analysis in aquatic ecosystems is emerging as a powerful basis for development of predictions of bioavailability and reliable risk assessment strategies. A given speciation sensor is characterized by an effective time scale or kinetic window that defines the measurable metal species via their labilities. Here we review the current state of the art for the theory and application of dynamic speciation sensors. We show that a common dynamic interpretation framework, based on rigorous flux expressions incorporating the relevant diffusion and reaction steps, is applicable for a suite of sensors that span a range of time scales. Interpolation from a kinetic spectrum of speciation data is proposed as a practical strategy for addressing questions of bioavailability. Case studies illustrate the practical significance of knowledge on the dynamic features of metal complex species in relation to biouptake, and highlight the limitations of equilibrium-based models.

Item Type: Article
Journal or Publication Title: Environmental Science & Technology
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 21282
Deposited By: ep_ss_importer
Deposited On: 08 Jan 2009 14:04
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 15:44
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/21282

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