Pertechnetate/Perrhenate Surface Complexation on Bamboo Engineered Biochar

Author:

Daňo MartinORCID,Viglašová EvaORCID,Štamberg Karel,Galamboš MichalORCID,Galanda Dušan

Abstract

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 99mTcO4− on biochar samples including influence of pH, contact time, and Freundlich isotherm. ReO4−, which has very similar chemical properties to 99mTcO4−, 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).

Funder

Agentúra na Podporu Výskumu a Vývoja

Publisher

MDPI AG

Subject

General Materials Science

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