Abstract
Spectral properties of water-dispersible sorbent produced from humic acids (HA) extracted from brown coal and magneto-active nanoparticles were measured for the samples of different magnetite/HA ratio and the way of their preparation. The influence of iron (III) ions on spectral properties of HA in aqueous solution was investigated using Stern-Volmer plots describing HA fluorescence quenching. The Stern-Volmer dependences were found to be linear at concentration of iron (III) ions smaller 20 μmol/L and nonlinear at higher concentrations.
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Burikov, S. A., Dolenko, T. A., Gorbunova, N. V., Gosteva, O. Y., Khundzhua, D. A., Kydralieva, K. A., … Yuzhakov, V. I. (2013). Fluorescence and raman spectroscopy study of humic acids in iron chloride solutions and magnetite/HA nanoparticles. In Functions of Natural Organic Matter in Changing Environment (Vol. 9789400756342, pp. 799–804). Springer Netherlands. https://doi.org/10.1007/978-94-007-5634-2_145
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