EJQ6 - Fall 2025 - Journal - Page 19
thousands of tons of soil. The addition of a PRB with a treatment reagent such as zero-valent iron (ZVI) forms a funneland-gate system, directing the 昀氀ow of contaminants through
the gate and trapping and/or treating them while continuing
to cut costs.
ISCO/ISCR + Stabilization - For chlorinated solvents or
volatile organic compounds (VOCs), organics, and metals
contaminants, oxidants (e.g., permanganate or persulfate)
or reductants (ZVI) can be mixed into soils to degrade
contaminant masses; a followon cementitious pass locks in
residuals and delivers geotechnical capacity if needed. This
“treat-then-stabilize” method shortens tail risks while
aligning with reuse objectives.
Containment case studies
These examples illustrate the 昀氀exibility of mixing techniques
from treatment and immobilization to hydraulic containment.
That versatility matters when you are balancing reuse, performance, and schedule under modern excesssoil rules.
E N V I RON M E N T J OURN A L QUA RT E RLY RE PORT • FA L L 2 02 5 • P AGE 1 9
