PCB containment using geosynthetics in Canada's Arctic
Two funnel-and-gate permeable reactive barriers (PRBs) with settling ponds comprised of a composite liner (geomembrane and geosynthetic clay liners (GCL)) were installed at Resolution Island (BAF-5), Nunavut to contain residual polychlorinated biphenyls (PCBs) moving with the sediment and annual sno...
Published in: | Polar Science |
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Format: | Article in Journal/Newspaper |
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2023
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ftnipr:oai:nipr.repo.nii.ac.jp:00017408 2023-07-16T03:57:01+02:00 PCB containment using geosynthetics in Canada's Arctic 2023-06 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=17408 http://id.nii.ac.jp/1291/00017264/ en eng https://doi.org/10.1016/j.polar.2023.100928 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=17408 http://id.nii.ac.jp/1291/00017264/ Polar Science, 36, 100928(2023-06) 18739652 Diffusion PCBs Geomembrane Permeable reactive barrier (PRB) Cold regions Journal Article 2023 ftnipr https://doi.org/10.1016/j.polar.2023.100928 2023-06-24T19:39:17Z Two funnel-and-gate permeable reactive barriers (PRBs) with settling ponds comprised of a composite liner (geomembrane and geosynthetic clay liners (GCL)) were installed at Resolution Island (BAF-5), Nunavut to contain residual polychlorinated biphenyls (PCBs) moving with the sediment and annual snowmelt. The long-term performance of the geosynthetics used in the PRB funnels is studied for physical integrity and diffusive barrier properties after nine years of operation. Exhumed geomembrane specimens are compared with virgin material by index testing: diffusive resistance to benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds, as well as puncture, burst, and tensile strength. Exhumed GCLs are evaluated concerning hydraulic conductivity, the mass of bentonite per unit area, and swell index. The migration of PCBs through the composite liner system by diffusion is modelled and the diffusive and sorptive properties of the geomembrane (Dg = 1.7 × 10−14 m2/s, Sgf = 160,000) and GCL (De = 3.1 × 10−10 m2/s, bentonite plus fibers layer Kd = 15 mL/g, cover geotextile Kd = 12,000 mL/g, and carrier geotextile Kd = 16,000 mL/g) were calculated. Modelling results estimate that the composite liner was successfully containing PCBs. This was confirmed by downgradient monitoring. The challenges of the location and terrain, PRB design, construction, and maintenance are discussed along with recommendations for designing PRBs in other remote and cold region environments. Article in Journal/Newspaper Arctic Nunavut Polar Science Polar Science National Institute of Polar Research Repository, Japan Arctic Nunavut Resolution Island ENVELOPE(-64.981,-64.981,61.551,61.551) Polar Science 36 100928 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Diffusion PCBs Geomembrane Permeable reactive barrier (PRB) Cold regions |
spellingShingle |
Diffusion PCBs Geomembrane Permeable reactive barrier (PRB) Cold regions PCB containment using geosynthetics in Canada's Arctic |
topic_facet |
Diffusion PCBs Geomembrane Permeable reactive barrier (PRB) Cold regions |
description |
Two funnel-and-gate permeable reactive barriers (PRBs) with settling ponds comprised of a composite liner (geomembrane and geosynthetic clay liners (GCL)) were installed at Resolution Island (BAF-5), Nunavut to contain residual polychlorinated biphenyls (PCBs) moving with the sediment and annual snowmelt. The long-term performance of the geosynthetics used in the PRB funnels is studied for physical integrity and diffusive barrier properties after nine years of operation. Exhumed geomembrane specimens are compared with virgin material by index testing: diffusive resistance to benzene, toluene, ethylbenzene, and xylenes (BTEX) compounds, as well as puncture, burst, and tensile strength. Exhumed GCLs are evaluated concerning hydraulic conductivity, the mass of bentonite per unit area, and swell index. The migration of PCBs through the composite liner system by diffusion is modelled and the diffusive and sorptive properties of the geomembrane (Dg = 1.7 × 10−14 m2/s, Sgf = 160,000) and GCL (De = 3.1 × 10−10 m2/s, bentonite plus fibers layer Kd = 15 mL/g, cover geotextile Kd = 12,000 mL/g, and carrier geotextile Kd = 16,000 mL/g) were calculated. Modelling results estimate that the composite liner was successfully containing PCBs. This was confirmed by downgradient monitoring. The challenges of the location and terrain, PRB design, construction, and maintenance are discussed along with recommendations for designing PRBs in other remote and cold region environments. |
format |
Article in Journal/Newspaper |
title |
PCB containment using geosynthetics in Canada's Arctic |
title_short |
PCB containment using geosynthetics in Canada's Arctic |
title_full |
PCB containment using geosynthetics in Canada's Arctic |
title_fullStr |
PCB containment using geosynthetics in Canada's Arctic |
title_full_unstemmed |
PCB containment using geosynthetics in Canada's Arctic |
title_sort |
pcb containment using geosynthetics in canada's arctic |
publishDate |
2023 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=17408 http://id.nii.ac.jp/1291/00017264/ |
long_lat |
ENVELOPE(-64.981,-64.981,61.551,61.551) |
geographic |
Arctic Nunavut Resolution Island |
geographic_facet |
Arctic Nunavut Resolution Island |
genre |
Arctic Nunavut Polar Science Polar Science |
genre_facet |
Arctic Nunavut Polar Science Polar Science |
op_relation |
https://doi.org/10.1016/j.polar.2023.100928 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=17408 http://id.nii.ac.jp/1291/00017264/ Polar Science, 36, 100928(2023-06) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2023.100928 |
container_title |
Polar Science |
container_volume |
36 |
container_start_page |
100928 |
_version_ |
1771543536826580992 |