Interaction of Humic Acids with Naphthalene

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Abstract

The interaction of humic acids (HA) isolated from oxidized brown coal with the polyaromatic hydrocarbon naphthalene has been studied. The electron-donating properties of HA were evaluated by the intensity of electronic transitions in the UV region and the calculated descriptors. The modification of the HA structure was carried out by the method of mechanical activation (MA) under alkaline and oxidative conditions. A significant increase in the proportion of aromatic and oxidized fragments in the HA structure after MA under oxidative conditions increased the intensity of binding of HA to naphthalene. A significant increase in the adsorption capacity of mechanoactivated HA in a dispersive aqueous medium with naphthalene has been shown.

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About the authors

N. V. Yudina

Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences

Author for correspondence.
Email: natal@ipc.tsc.ru
Russian Federation, Tomsk

T. V. Petrenko

Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences

Email: uvikon@ipc.tsc.ru
Russian Federation, Tomsk

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Supplementary files

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2. Fig. 1. Absorption spectra: (a) naphthalene; (b) 1 - HA, 2 - HA1, 3 - HA2

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3. Fig. 2. Absorption spectra: (a) 1 - HK1H, 2 - HK11H, 3 - HK21H; (b) 2 - HK2H, 2 - HK12H, 3 - HK22N

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4. Fig. 3. Adsorption isotherms of naphthalene by humic acids in dispersed aqueous medium: 1 - HA, 2 - HA1, 3 - HA2

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