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Tracing Waste Water with Li isotopes

Abstract : The contribution of human activities such as industries, agriculture and various domestic inputs, becomes more and more significant in the chemical composition of the dissolved load of rivers. Human factors act as a supplementary key process. Therefore the mass-balance for the budget of catchments and river basins include anthropogenic disturbances. In the present study, we investigate waste water tracing by the use of Li isotopes in a small river basin near Orléans in France (l’Egoutier, 15 km² and 5 km long). It is well known that Li has strategic importance for numerous industrial applications including its use in the production of batteries for both mobile devices (computers, tablets, smartphones, etc.) and electric vehicles, but also in pharmaceutical formulations. In the present work, we collected river waters samples before and after the release from a waste water treatment plant connected to an hospital. Lithium isotopic compositions are rather homogeneous in river waters with d7Li values around -0.5‰ ± 1 along the main course of the stream (n=7). The waste water sample is very different from the natural background of the river basin with Li concentration being twice of the values without pollution and significant heavy lithium contribution (d7Li = +4‰). These preliminary results will be discussed in relation with factors controlling the distribution of Li and its isotopes in this specific system and compared with the release of other metals such as Pb or Zn.
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Contributeur : Romain Millot Connectez-vous pour contacter le contributeur
Soumis le : lundi 9 novembre 2015 - 14:36:58
Dernière modification le : lundi 25 juillet 2022 - 03:49:14


  • HAL Id : hal-01226396, version 1



Anne-Marie Desaulty, Romain Millot. Tracing Waste Water with Li isotopes. AGU Fall Meeting - American Geophysical Union, Dec 2015, San Francisco, United States. 2015. ⟨hal-01226396⟩



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