期刊
MATERIALS
卷 14, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ma14030486
关键词
engineered biochar; technetium; rhenium; potentiometric titration; sorption; modelling
类别
资金
- APVV agency [APVV-18-0534]
- Ministry of Education Youth and Sports
- MEYS [CZ.02.1.01/0.0/0.0/16_019/0000728]
- European Union-European Structural and Investment Funds, Operational Programme Research, Development and Education
The study evaluated biochar samples prepared from bamboo, focusing on structural properties, batch and dynamic sorption experiments, and potentiometric titrations. The research found that the biochar samples exhibited good adsorption properties for (TcO4-)-Tc-99m, with excellent model fitting results.
The work deals with the evaluation of biochar samples prepared from Phyllostachys Viridiglaucescens bamboo. This evaluation consists of the characterization of prepared materials' structural properties, batch and dynamic sorption experiments, and potentiometric titrations. The batch technique was focused on obtaining basic sorption data of (TcO4-)-Tc-99m on biochar samples including influence of pH, contact time, and Freundlich isotherm. ReO4-, which has very similar chemical properties to (TcO4-)-Tc-99m, was used as a carrier in the experiments. Theoretical modeling of titration curves of biochar samples was based on the application of surface complexation models, namely, so called Chemical Equilibrium Model (CEM) and Ion Exchange Model (IExM). In this case it is assumed that there are two types of surface groups, namely, the so-called layer and edge sites. The dynamic experimental data of sorption curves were fitted by a model based on complementary error function erfc(x).
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