Waste brick dust as potential sorbent of lead and cesium from contaminated water

0504880 - ÚMCH 2020 RIV CH eng J - Journal Article
Doušová, B. - Koloušek, D. - Lhotka, M. - Keppert, M. - Urbanová, Martina - Kobera, Libor - Brus, Jiří
Waste brick dust as potential sorbent of lead and cesium from contaminated water.
Materials. Roč. 12, č. 10 (2019), s. 1-12, č. článku 1647. E-ISSN 1996-1944
Institutional support: RVO:61389013
Keywords : waste brick dust * adsorption * lead
OECD category: Polymer science
Impact factor: 3.057, year: 2019
Method of publishing: Open access
https://www.mdpi.com/1996-1944/12/10/1647/pdf

Adsorption properties of waste brick dust (WBD) were studied by the removing of PbII and CsI from an aqueous system. For adsorption experiments, 0.1 M and 0.5 M aqueous solutions of Cs+ and Pb2+ and two WBD (Libochovice-LB, and Tyn nad Vltavou-TN) in the fraction below 125 µm were used. The structural and surface properties of WBD were characterized by X-ray diffraction (XRD) in combination with solid-state nuclear magnetic resonance (NMR), supplemented by scanning electron microscopy (SEM), specific surface area (SBET), total pore volume and zero point of charge (pHZPC). LB was a more amorphous material showing a better adsorption condition than that of TN. The adsorption process indicated better results for Pb2+, due to the inner-sphere surface complexation in all Pb2+ systems, supported by the formation of insoluble Pb(OH)2 precipitation on the sorbent surface. A weak adsorption of Cs+ on WBD corresponded to the non-Langmuir adsorption run followed by the outer-sphere surface complexation. The leachability of Pb2+ from saturated WBDs varied from 0.001% to 0.3%, while in the case of Cs+, 4% to 12% of the initial amount was leached. Both LB and TN met the standards for PbII adsorption, yet completely failed for any CsI removal from water systems.
Permanent Link: http://hdl.handle.net/11104/0297056