APPLICATION OF POWDERED BUILDING WASTES IN ADSORPTION TECHNOLOGIES

1 DOUŠOVÁ Barbora
Co-authors:
2 REITERMAN Pavel 1 LHOTKA Miloslav 2 KEPPERT Martin 1 KOLOUŠEK David
Institutions:
1 University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic, EU, dousovab@vscht.cz
2 Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 16629 Prague 6, Czech Republic, EU, pavel.reiterman@fsv.cvut.cz
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
267-272
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
41 views / 11 downloads
Abstract

Two powdered wastes originating in building materials production (waste brick dust (WBD) from the production of ceramic blocks and concrete slurry waste (CSW) from prestressed poles production used also in Fe-modified form (CSWFe)) were studied as potential adsorbents of ecologically risk cations (Cd2+, Pb2+) and anions (AsV as AsO43- and CrVI as CrO42-) from contaminated waters. The WBD indicated very good adsorption selectivity for Cd2+, Pb2+ and AsV at a high adsorption efficiency (>90%), and worse parameters for CrVI adsorption (<30% adsorption efficiency). The sorbent consumption was low (<70 – 100 g per 1 g of contaminant) for cations (Cd2+, Pb2+) and more than four times higher for AsV. The adsorption of CrVI on WBD was ineffective. The adsorption of cations (Pb2+ and Cd2+) on CSW and anions (AsO43- and CrO42-) on CSWFe ran in the same manner as on WBD. Fe-modification of CSW to CSWFe increased its adsorption efficiency to anions by 15. – 20%. The cations (Pb2+, Cd2+) were adsorbed almost quantitatively (≈100%) on the initial CSW at the sorbent consumption of 10 – 120 g per 1 g of contaminant. The adsorption of anions (AsV, CrVI) on CSWFe reached ˃95% for AsV and 40-60% for CrVI, at the sorbent consumption of 80 – 200 g per 1 g of contaminant.

Keywords: Building waste, adsorption, heavy metals, toxic anions
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