Geosynthetics October/November 2021 - 17

Qin/Qout was near 1.0 after 1.7 ounces (50
mL) cumulative inflow, indicating the
GCL was hydrated. The EC ratio diminished
as salts were flushed from the pore
space, with ECout/ECin within 1 ± 0.1
after 8.1 ounces (240 mL) of inflow. The
ratio pHout/pHin was always within 1±
0.1, indicating pH equilibrium.
Effect of ionic strength
Hydraulic conductivity of the BPC GCLs
as a function of ionic strength of the CCR
leachates is shown in Figure 5. Hydraulic
conductivities of the NaB GCLs to CCR
leachates from Chen et al. (2019) are also
shown in the figure. Hydraulic conductivities
of the BPC GCLs are one to four
orders of magnitude lower than hydraulic
conductivities of NaB GCLs for similar
ionic strength. Hydraulic conductivity of
the NaB GCL is strongly affected by ionic
strength, whereas hydraulic conductivity
of the BPC GCL is nearly independent of
ionic strength. All of the BPC GCLs had
hydraulic conductivity less than 10-10
m/s, even when permeated with leachate
of high ionic strength (i.e., CCR-WY
with I = 681 mM). Most were less than 1
× 10-11 m/s.
Effect of RMD and anion ratio
Hydraulic conductivity of the BPC GCL
is shown as a function of RMD and anion
ratio of the CCR leachates in Figures 6a
and 6b on page 18. No trends are evident
with RMD or anion ratio, except
Hydraulic
conductivities of
the BPC GCL are
one to four orders
of magnitude lower
than hydraulic
conductivities of the
NaB GCL for similar
ionic strength.
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17
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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
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Geosynthetics October/November 2021 - 16
Geosynthetics October/November 2021 - 17
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Geosynthetics October/November 2021 - 19
Geosynthetics October/November 2021 - 20
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Geosynthetics October/November 2021 - 22
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Geosynthetics October/November 2021 - 25
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Geosynthetics October/November 2021 - 35
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Geosynthetics October/November 2021 - Cover3
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