Laboratory Comparison of Nzvi / S-nzvi Efficiency in Systems with And Without Power
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Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
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.
Description
Subject(s)
zerovalent-iron nanoparticles, chlorinated hydrocarbons, surface modification, direct current
Citation
ISSN
2694-930X
ISBN
978-80-87294-95-6