Abstract
Using gallium salts, it is possible to combine 71Ga NMR and Ga K-edge x-ray absorption spectroscopy for determining the speciation of the solution along the hydrolytic pathway. Using such experimental methods, we can propose a logical sequence of oligomers leading to the formation of Keggin type polycations. The data obtained make it possible to test the coagulating efficiency of gallium salts with increasing hydrolysis ratios while knowing precisely the nature of the active species in solution. In view of the analogies observed between the aqueous behavior of aluminum and gallium, such a fundamental study could provide useful insight leading to a better control of aluminum salts based coagulation processes in drinking water treatment operations.
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Michot, L.J., Montargès-Pelletier, E., Lartiges, B.S., Kazpard, V., de la Caillerie, J.B.d., Briois, V. (2000). Investigating the Chemistry of Aluminium-Based Coagulants from Ga K-Edge Absorption Spectroscopy. In: Hahn, H.H., Hoffmann, E., Ødegaard, H. (eds) Chemical Water and Wastewater Treatment VI. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59791-6_5
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DOI: https://doi.org/10.1007/978-3-642-59791-6_5
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