Sorption of americium by detonation synthesis nanodiamonds from aqueous solutions of various compositions

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Sorption of americium by commercial samples of detonation nanodiamonds (NDs) from nitric acid, neutral, and alkaline solutions was investigated. Sorption kinetics and dependence of sorption degree on pH, ionic strength, m/V ratio and temperature were studied. Thermodynamic parameters of americium adsorption by NDs were determined for the first time. Conditions of quantitative sorption of americium by NDs samples were found; it was shown that NDs are promising sorbents for decontamination of natural waters from possible americium impurities.

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作者简介

А. Kazakov

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS

编辑信件的主要联系方式.
Email: kazakov.ag@geokhi.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991

D. Pavlova

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS; Mendeleev Russian University of Chemical Technology

Email: kazakov.ag@geokhi.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991; Miusskaya pl. 9, Moscow, 125047

S. Vinokurov

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS

Email: kazakov.ag@geokhi.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991

B. Myasoedov

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS; Interdepartmental Center for Analytical Research in Physics, Chemistry, and Biology, RAS

Email: kazakov.ag@geokhi.ru
俄罗斯联邦, ul. Kosygina 19, Moscow, 119991; Moscow, 117997

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2. Fig. 1. Dependence of the ζ-potential of the surface of TAN and STP aggregates on pH.

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3. Fig. 2. Kinetics of americium sorption in media with pH from 3 to 10 by TAN (a) and STP (b) samples at 25°C; HA content 100 μg/ml.

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4. Fig. 3. Dependence of the degree of americium sorption on pH and salt background at an HA content of 100 μg/ml at 25°C.

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5. Fig. 4. Dependence of the degree of americium sorption at different pH on the NA content at 25°C.

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6. Fig. 5. Effect of temperature on the degree of americium sorption by the TAN sample at pH 6 with different NA contents.

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7. Fig. 6. Approximation of experimental data (points) by the Henry isotherm model (lines) for the sorption of americium by the TAN sample at pH 6.

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