<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Due to the extreme toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), the remediation of PCDD/F aquifer source zones is greatly needed; however, it is very difficult due to their persistence and recalcitrance. The potential degradability of PCDD/F bound to a real matrix was studied in five systems: iron in a high oxidation state (ferrate), zero-valent iron nanoparticles (nZVI), palladium nanopowder (Pd), a combination of nZVI and Pd, and persulfate (PSF). The results were expressed by comparing the total toxicity of treated and untreated samples. This was done by weighting the concentrations of congeners (determined using a standardized GC/HRMS technique) by their defined toxicity equivalent factors (TEF). The results indicated that only PSF was able to significantly degrade PCDD/F. Toxicity in the system decreased by 65% after PSF treatment. Thus, we conclude that PSF may be a potential solution for in-situ remediation of soil and groundwater at PCDD/F contaminated sites.</p></abstract>

Due to the extreme toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), the remediation of PCDD/F aquifer source zones is greatly needed; however, it is very difficult due to their persistence and recalcitrance. The potential degradability of PCDD/F bound to a real matrix was studied in five systems: iron in a high oxidation state (ferrate), zero-valent iron nanoparticles (nZVI), palladium nanopowder (Pd), a combination of nZVI and Pd, and persulfate (PSF). The results were expressed by comparing the total toxicity of treated and untreated samples. This was done by weighting the concentrations of congeners (determined using a standardized GC/HRMS technique) by their defined toxicity equivalent factors (TEF). The results indicated that only PSF was able to significantly degrade PCDD/F. Toxicity in the system decreased by 65% after PSF treatment. Thus, we conclude that PSF may be a potential solution for in-situ remediation of soil and groundwater at PCDD/F contaminated sites.

Chemical Degradation of PCDD/F in Contaminated Sediment

Faculty of Mechatronics, Informatics and Interdisciplinary Studies & the Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 1402/2 Liberec, 46117, Czech Republic

Ecological Chemistry and Engineering S

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Chemical Degradation of PCDD/F in Contaminated Sediment"}

Due to the extreme toxicity of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), the remediation of PCDD/F aquifer source zones is greatly needed;...

Chemical Degradation of PCDD/F in Contaminated Sediment

Online veröffentlicht: 20. Okt. 2016

Seitenbereich: 473 - 482

DOI: https://doi.org/10.1515/eces-2016-0034

Schlüsselwörter
PCDD/F, ferrate, nZVI, Pd, persulfate, degradation

© by Martina Homolková

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Chemical Degradation of PCDD/F in Contaminated Sediment

Online veröffentlicht: 20. Okt. 2016

Seitenbereich: 473 - 482

DOI: https://doi.org/10.1515/eces-2016-0034

SchlüsselwörterPCDD/F, ferrate, nZVI, Pd, persulfate, degradation

© by Martina Homolková

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Schlüsselwörter
PCDD/F, ferrate, nZVI, Pd, persulfate, degradation