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Synthesis of the bimetallic nZVIs
2nd International Conferences on Nanotechnology & Chemistry
April 06-07, 2022 | Webinar
Miroslav Cernik
Swiss Federal Institute of Technology ETH, Zurich, Switzerland
Scientific Tracks Abstracts : J Pharm Chem Chem Sci
Abstract:
The zero-valent iron nanoparticles (nZVI) are frequently used for remediation of contaminated groundwater. The efficiency of their application depends on their mobility in aquifers and selective reactivity with contaminants, mainly chlorinated hydrocarbons. The nZVI efficacy in degrading chlorinated pollutants is often enhanced by the deposition of other metals on their surface. The bimetallic nZVI with palladium (nZVI/Pd), nickel (nZVI/Ni), silver (nZVI/Ag), and copper (nZVI/Cu) have increased reactivity with the contaminants, or in some cases even allow such reaction. The poster describes the synthesis of the bimetallic nZVIs and their used in the degradation of chlorinated volatile organic compounds (CVOC) such as vinyl chloride (VC), 1,2-dichloroethylene (DCE), trichloroethylene (TCE), and perchloroethylene (PCE) in spiked water and real groundwater. Bimetallic nZVIs demonstrated superior degradation efficiencies compared to pristine nanoparticles. While pristine nZVI degraded The zero-valent iron nanoparticles (nZVI) are frequently used for remediation of contaminated groundwater. The efficiency of their application depends on their mobility in aquifers and selective reactivity with contaminants, mainly chlorinated hydrocarbons. The nZVI efficacy in degrading chlorinated pollutants is often enhanced by the deposition of other metals on their surface. The bimetallic nZVI with palladium (nZVI/Pd), nickel (nZVI/Ni), silver (nZVI/Ag), and copper (nZVI/Cu) have increased reactivity with the contaminants, or in some cases even allow such reaction. The poster describes the synthesis of the bimetallic nZVIs and their used in the degradation of chlorinated volatile organic compounds (CVOC) such as vinyl chloride (VC), 1,2-dichloroethylene (DCE), trichloroethylene (TCE), and perchloroethylene (PCE) in spiked water and real groundwater. Bimetallic nZVIs demonstrated superior degradation efficiencies compared to pristine nanoparticles. While pristine nZVI degraded The zero-valent iron nanoparticles (nZVI) are frequently used for remediation of contaminated groundwater. The efficiency of their application depends on their mobility in aquifers and selective reactivity with contaminants, mainly chlorinated hydrocarbons. The nZVI efficacy in degrading chlorinated pollutants is often enhanced by the deposition of other metals on their surface. The bimetallic nZVI with palladium (nZVI/Pd), nickel (nZVI/Ni), silver (nZVI/Ag), and copper (nZVI/Cu) have increased reactivity with the contaminants, or in some cases even allow such reaction. The poster describes the synthesis of the bimetallic nZVIs and their used in the degradation of chlorinated volatile organic compounds (CVOC) such as vinyl chloride (VC), 1,2-dichloroethylene (DCE), trichloroethylene (TCE), and perchloroethylene (PCE) in spiked water and real groundwater. Bimetallic nZVIs demonstrated superior degradation efficiencies compared to pristine nanoparticles. While pristine nZVI degraded ~6%, ~57%, and ~26% of DCE, TCE, and PCE, respectively, nZVI/Pd and nZVI/Ni degraded all the contaminants almost completely within 24 h. The eeficiency decreased from nZVI/Pd ~ nZVI/Ni to nZVI/Ag and nZVI/Cu. The most promising nanoparticles of nZVI/Pd and nZVI/Ni were further tested in the contaminant mixture (total CVOC concentration 25 mg/L, 24 h of degradation time) as well as in samples of real groundwater (taken from Novy Bydzov, CZ). These bimetallic nZVIs demonstrated a significant increase in the degradation efficiency (from~10% using pristine nZVI to 99.9% using nZVI/Pd or nZVI/Ni). Even in mixed polluted groundwater (containing also organic acids, sulfate anions) the bimetallic nZVI/Pd, and nZVI/Ni showed excellent degradation efficiency towards PCE. The samples containing PCE were completely degraded in 24 h. On the other hand, both nZVI/Ag and nZVI/Cu showed only a minor improvement in degradation efficiency.
Biography:
Prof. Miroslav Cernik born in the Czech Republic received his Ph.D. in Natural Science at the Swiss Federal Institute of Technology (ETH Zurich Switzerland). Nowadays, he is Nanochemistry. He also attended many international conferences.
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