LABORATORY COMPARISON OF NZVI / S-NZVI EFFICIENCY IN SYSTEMS WITH AND WITHOUT POWER

1 VOLOŠČUKOVÁ Ondřejka
Co-authors:
2 SKÁCELOVÁ Petra 1 PAVELKOVÁ Alena 2 SLUNSKÝ Jan 1 NOSEK Jaroslav
Institutions:
1 Technical University of Liberec, Institute for Nanomaterials, Advanced Technologies and Innovation (CXI), Studentská 2, Liberec, 461 17, Czech Republic, EU, ondrejka.voloscukova@tul.cz , alena.pavelkova@tul.cz, jaroslav.nosek1@tul.cz
2 NANO IRON, s.r.o., Topolová 933, Židlochovice,667 01, Czech Republic, EU, skacelova@nanoiron.cz, slunsky@nanoiron.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:
287-292
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:
73 views / 22 downloads
Abstract

The use of nZVI is well known method for remediation of groundwater contaminated with chlorinated hydrocarbons. The present paper investigates the ability of traditional nZVI and S-nZVI modified with sulphide ion (HS-) to reduce CHC in real wastewater sample. In the effort to enhance longevity and efficiency of the treatment, experiments were performed under applied voltage (patent 304152, owner MEGA a.s., TUL). Results showed elevated reactivity of nZVI in reactors with passing voltage. The decomposition of the CHC in DC supported reactors occurred several times faster than in reactors without added voltage. However, the analysis of products suggests different pathway of decomposition when S-nZVI is used. The main product of reductive dechlorination was acetylene as opposite to regular nZVI which produced predominantly ethene and ethane. The nZVI provided with DC showed the most rapid decline of all contaminants in the time frame of 5 days.

Keywords: zerovalent-iron nanoparticles, chlorinated hydrocarbons, surface modification, direct current
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