Geosynthetics October/November 2021 - 25

and PFHxS reduced to 0.32 ppb (0.32
µg/L) concentrations (Figure 4). The
hydraulic conductivity at termination of
the analysis was 4.29 × 10-11 m/s, which
was to be expected as this was the same
PMB as the initial study with the addition
of a permeable AC cloth.
An AC powder was sourced that
had the specific set of unique properties
shown to perform with certain PFAS
compounds. This was blended with the
PMB bentonite at increasing percentages
to optimize the PFAS attenuation
and hydraulic performance (Figure 5), as
unlike the permeable AC cloth, an inverse
relationship exists between increasing
nonswelling powder content and decreasing
hydraulic performance. Historic trials
indicated that blending other minerals
with a specific bentonite by up to 25%
by weight would still result in a low level
of hydraulic conductivity. Preliminary
data collected highlighted a blend of 0.20
pounds per square foot (1 kg/m2) of powdered
AC with 0.82 pounds per square
foot (4 kg/m2) of select bentonite returned
an acceptable level of both hydraulic and
PFAS attenuation performance. All three
compounds of specific interest (PFOS,
PFOA and PFHxS) were attenuated to
below the 0.1 ppb (0.1 µg/L) LOR after the
same pore volumes of flow as the earlier
trial data. Further research was then initiated
with this powdered AC/bentonite
blend, with the resulting product termed
a hybrid geosynthetic clay liner (hGCL).
An AC powder was
sourced that had the
specific set of unique
properties shown to
perform with certain
PFAS compounds.
''
Did you miss us? Our webinar series is still
available on our website. A new series will
be announced soon.
- Geo The Gopher
Check out the list of topics:
* Geosynthetics 101: An
Introduction to materials,
functions and manufacturing
* Geosynthetics in Filtration
and Drainage Applications
* Subgrade Stabilization/
Roadway Reinforcement
* Moisture Management for
Pavement Systems
* Pavement Interlayers
* Geosynthetic Reinforced Retaining
Walls (MSE) and Reinforced Slopes
* Geosynthetic Reinforcement
for Pond Cap Enclosures and
Construction Platforms
* TenCate Geotube®
Dewatering Technology
* Geosynthetic Stabilization and
MiraSpec Software Demo
* Various Geosynthetic Case Studies
And many more!
PDH Credits Are Available Through
TenCate Virtual Learning Webinars
Visit tencategeo.us for
updates on our new series.
www.GeosyntheticsMagazine.com
25
''
http://www.tencategeo.us http://www.GeosyntheticsMagazine.com

Geosynthetics October/November 2021

Table of Contents for the Digital Edition of Geosynthetics October/November 2021

Geosynthetics October/November 2021 - Cover1
Geosynthetics October/November 2021 - Cover2
Geosynthetics October/November 2021 - 1
Geosynthetics October/November 2021 - 2
Geosynthetics October/November 2021 - 3
Geosynthetics October/November 2021 - 4
Geosynthetics October/November 2021 - 5
Geosynthetics October/November 2021 - 6
Geosynthetics October/November 2021 - 7
Geosynthetics October/November 2021 - 8
Geosynthetics October/November 2021 - 9
Geosynthetics October/November 2021 - 10
Geosynthetics October/November 2021 - 11
Geosynthetics October/November 2021 - 12
Geosynthetics October/November 2021 - 13
Geosynthetics October/November 2021 - 14
Geosynthetics October/November 2021 - 15
Geosynthetics October/November 2021 - 16
Geosynthetics October/November 2021 - 17
Geosynthetics October/November 2021 - 18
Geosynthetics October/November 2021 - 19
Geosynthetics October/November 2021 - 20
Geosynthetics October/November 2021 - 21
Geosynthetics October/November 2021 - 22
Geosynthetics October/November 2021 - 23
Geosynthetics October/November 2021 - 24
Geosynthetics October/November 2021 - 25
Geosynthetics October/November 2021 - 26
Geosynthetics October/November 2021 - 27
Geosynthetics October/November 2021 - 28
Geosynthetics October/November 2021 - 29
Geosynthetics October/November 2021 - 30
Geosynthetics October/November 2021 - 31
Geosynthetics October/November 2021 - 32
Geosynthetics October/November 2021 - 33
Geosynthetics October/November 2021 - 34
Geosynthetics October/November 2021 - 35
Geosynthetics October/November 2021 - 36
Geosynthetics October/November 2021 - 37
Geosynthetics October/November 2021 - 38
Geosynthetics October/November 2021 - 39
Geosynthetics October/November 2021 - 40
Geosynthetics October/November 2021 - 41
Geosynthetics October/November 2021 - 42
Geosynthetics October/November 2021 - 43
Geosynthetics October/November 2021 - 44
Geosynthetics October/November 2021 - Cover3
Geosynthetics October/November 2021 - Cover4
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-december-2021-january-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
https://www.nxtbook.com/ifai/geosynthetics/1220GS
https://www.nxtbook.com/ifai/geosynthetics/1020GS
https://www.nxtbook.com/ifai/geosynthetics/0820GS
https://www.nxtbook.com/ifai/geosynthetics/0620GS
https://www.nxtbook.com/ifai/geosynthetics/0420GS
https://www.nxtbook.com/ifai/geosynthetics/0220GS
https://www.nxtbook.com/ifai/geosynthetics/1219GS
https://www.nxtbook.com/ifai/geosynthetics/1019GS
https://www.nxtbook.com/ifai/geosynthetics/0819GS
https://www.nxtbook.com/ifai/geosynthetics/0619GS
https://www.nxtbook.com/ifai/geosynthetics/0419GS
https://www.nxtbook.com/ifai/geosynthetics/0219GS
https://www.nxtbook.com/ifai/geosynthetics/1218GS
https://www.nxtbook.com/ifai/geosynthetics/1018GS
https://www.nxtbook.com/ifai/geosynthetics/0818GS
https://www.nxtbook.com/ifai/geosynthetics/0618GS
https://www.nxtbook.com/ifai/geosynthetics/0418GS
https://www.nxtbook.com/ifai/geosynthetics/0218GS
https://www.nxtbookmedia.com