Behaviour of nanomaterials in the environment: a study of interaction between humic acids and fullerene C60 | Nanomateriāli vidē: mijiedarbības izpēte starp humusvielām un fullerēnu C60
2010
Klavins, M., University of Latvia, Riga (Latvia) | Ansone, L., University of Latvia, Riga (Latvia) | Zicmanis, A., University of Latvia, Riga (Latvia)
The growth of nanotechnology applications requires the environmental impact assessment elaborated nanomaterials to reduce the environmental risks in case of their releases and possible pollution. Buckminsterfullerene C60 is an example of carbon-containing nanomaterials with diversity of potential applications, environmental and health effects being also. The poor solubility of C60 in natural waters is a major factor controlling the environmental transport and biological interactions. The aim of the present study is to analyze the complexing between humic substances and fullerene C60, as well as to study the impact of environmental factors and properties of humic substances on the complex formation. Buckminsterfullerene C60 causes quenching of the fluorescence signal of humic substances and the intensity of the quenching is proportional to the concentration of C60. Thus the ratio I0/I can be used to estimate the complexing process as known in metal-humic acid interaction studies. We have determined the binding constants between fullerene and studied humic acids, using the fluorescence quenching technique. The results of this study support the development of understanding of the fate of nanomaterials in the environment as well as the development of analytical methods for nanomaterial determination in waters and wastewater treatment approaches.
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