Title

Selected elements cations exchange in acidic medium on sorbents surface based on modified brown coal

Journal title

Gospodarka Surowcami Mineralnymi - Mineral Resources Management

Yearbook

2017

Numer

No 1

Publication authors

Agata Stempkowska ; Piotr Izak ; Joanna Mastalska-Popławska

Divisions of PAS

Nauki Techniczne

Abstract

<jats:title>Abstract</jats:title><jats:p>Studies on the sorption and desorption of selected Na</jats:p><jats:p>Studies have shown that sorbents based on modified brown coal have rather significant exchange capacities in the range of 270-450 meq/100 g for the first stage and 90-200 meq/100 g for the second stage. It was also found that purified humic acid (450-200 meq/100 g) has the highest exchange capacity and modified brown coal obtained at 250°C has the lowest. The measurement of desorption showed that approximately 10% of the cations are already leached by distilled water and the residue is desorbed under the influence of 10% hydrochloric acid, but the total amount of cations is compatible with the measurement process of the second stage.</jats:p><jats:p>The sorption affinity to various cations is different. In the case of the sorption measurements, modified sorbents show the highest sorption affinity with respect to calcium, while the unmodified raw brown coal with respect to chromium. The next stage of the measurement showed that the valence of the cation has the highest impact on the sorption affinity.</jats:p>

Publisher

Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN ; Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Date

2017

Identifier

ISSN 0860-0953

DOI

10.1515/gospo-2017-0002