Polycal
2 -
Technology Brief
Technology Description: Polycal 2 is a nonhazardous inorganic
sulfide that can be used to stabilize metals present in soil, sludge, and
other media. It is available in both
liquid and solid forms.
Polycal 2 has a variety of potential
uses including insitu and exsitu
environmental restroration, hazardous and
mixed waste treatment, and use as a insitu
reactive barrier. The following
is a brief list of potential applications.
Potential Uses |
Benefits |
-
Stabilization soil containing heavy
metals. (Arsenic,
Barium, Cadmium, Lead, Selenium, Silver)
-
Inline treatment of waste from manufacturing
or tank
clean out.
-
Stabilization of metals in mixed
radioactive/hazardous
waste.
-
Treatment of waste and sludge containing
metals.
-
Insitu treatment of shallow soil containing
metals.
-
Stabilization of metals in dredge spoils
and mining
waste.
-
Treatment of waste water and ground
water containing
metals.
|
-
Limited
waste volume increase (only 1-5% vs. 10-20%).
-
Less
waste results in decreased transport and disposal costs.
-
Curing
time of less than 1 minute.
-
Handling
properties of waste are not affected by treatment.
-
Curing
is not affected by the presence on organic compounds.
-
Treated
material can be tested immediately rather than waiting 28 days.
-
Treated
material can be stockpiled while waiting test results.
- Cost Savings: The total cost for using Polycal 2 could be up
to 40% less
than costs for cementation. Factors
influencing the
cost savings Polycal 2 projects include the following:
- Volume increase of waste treated with
Polycal 2is
typically only 5%.
- No
physical change in waste results in more efficient
material handling.
- Transportation & disposal costs
are less due to
smaller volumes and easier handling.
|
Regulatory Acceptance: Polycal
2 is the active ingredient
in metals
stabilization projects approved in numerous states including Massachusetts,
New York, and Missouri. It was the active ingredient that was demonstrated
in Utah under the USEPA SITE program. On going development programs are
being funded by government and commercial clients for new applications.
Validation: Full-scale
projects have been completed at five sites. At each
site, TCLP levels of
lead were reduced three orders of magnitude (to below
acceptable levels)
in treated samples. Successful projects have also been
completed on inline
waste treatment. Successful bench scale tests of sludge
and a supernate have
also been completed.
Polycal
2 - Technology Brief
|
