<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Zero-valent iron is very effective in the treatment of groundwater contaminated with chlorinated hydrocarbons and solvents broadly used in industrial production. In terms of its sustainability and cost, a legitimate effort has been devoted to the optimization of the remediation process, which can be demanding and expensive. In this study, the application potential and fundamental properties of several commercial micro-sized zero-valent iron (μZVI) were investigated. Although the manufacturers report the basic parameters of μZVI, it has been shown that the actual reactivity of apparently similar products varies notably. This work was focused on monitoring of frequently occurring contaminants. The actual contaminated water from the Pisecna locality -former landfill of industrial waste, with high levels of chlorinated ethenes and ethanes (PCE, TCE, cis-1,2-DCE and 1,2-DCA) was used for the experiment. The degree of dechlorination reached over 85 % 32 days after the application of μZVI in several samples and a far higher reaction rate for smaller particles was observed. Also, the amount of cis-1,2-DCE, which is characterized by slow decomposition, decreased by more than 95 % over the course of the experiment. Smaller particles showed a much longer sedimentation rate and gradual fractionation was also observed. Monitoring of ORP and pH also suggested that the smaller particles possessed a reduction capacity that was sufficiently high even at the end of the experiment. Laboratory tests with apparently similar μZVI samples indicated considerable differences in their reaction rate and efficiency.</p></abstract>

Zero-valent iron is very effective in the treatment of groundwater contaminated with chlorinated hydrocarbons and solvents broadly used in industrial production. In terms of its sustainability and cost, a legitimate effort has been devoted to the optimization of the remediation process, which can be demanding and expensive. In this study, the application potential and fundamental properties of several commercial micro-sized zero-valent iron (μZVI) were investigated. Although the manufacturers report the basic parameters of μZVI, it has been shown that the actual reactivity of apparently similar products varies notably. This work was focused on monitoring of frequently occurring contaminants. The actual contaminated water from the Pisecna locality -former landfill of industrial waste, with high levels of chlorinated ethenes and ethanes (PCE, TCE, cis-1,2-DCE and 1,2-DCA) was used for the experiment. The degree of dechlorination reached over 85 % 32 days after the application of μZVI in several samples and a far higher reaction rate for smaller particles was observed. Also, the amount of cis-1,2-DCE, which is characterized by slow decomposition, decreased by more than 95 % over the course of the experiment. Smaller particles showed a much longer sedimentation rate and gradual fractionation was also observed. Monitoring of ORP and pH also suggested that the smaller particles possessed a reduction capacity that was sufficiently high even at the end of the experiment. Laboratory tests with apparently similar μZVI samples indicated considerable differences in their reaction rate and efficiency.

Cost-Effective Remediation Using Microscale Zvi: Comparison of Commercially Available Products

Institute for Nanomaterials, Advanced Technologies and Innovation

Ecological Chemistry and Engineering S

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Zero-valent iron is very effective in the treatment of groundwater contaminated with chlorinated hydrocarbons and solvents broadly used in industrial...

Cost-Effective Remediation Using Microscale Zvi: Comparison of Commercially Available Products

Published Online: Jul 17, 2020

Page range: 211 - 224

DOI: https://doi.org/10.2478/eces-2020-0014

Keywords
micro-sized zero-valent iron, chlorinated hydrocarbons degradation, commercial ZVI, cost-effective remediation

© 2020 Alena Pavelková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Cost-Effective Remediation Using Microscale Zvi: Comparison of Commercially Available Products

Published Online: Jul 17, 2020

Page range: 211 - 224

DOI: https://doi.org/10.2478/eces-2020-0014

Keywordsmicro-sized zero-valent iron, chlorinated hydrocarbons degradation, commercial ZVI, cost-effective remediation

© 2020 Alena Pavelková et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
micro-sized zero-valent iron, chlorinated hydrocarbons degradation, commercial ZVI, cost-effective remediation