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https://hdl.handle.net/11681/12203| Title: | Dispersion by chemical reaction of Rocky Mountain Arsenal Basin F waste soils |
| Authors: | Payne, James R. Marion, Giles M. (Giles Michael) |
| Keywords: | DCR process Pesticides Stabilization Immobilization Remediation Soils Soil remediation Rocky Mountain Arsenal, Colorado |
| Publisher: | Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Special report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 97-3. |
| Description: | Special Report Abstract: Many military installations have soil contamination problems that range from heavy metals to petroleum products. Rocky Mountain Arsenal (RMA) Basin F contains high concentrations of salts, heavy metals, ammonia, urea, and organics. The Dispersion by Chemical Reaction (DCR) process leads to a reduction in the mobility of the organic and inorganic constituents by first removing volatile constituents via steam stripping and volatilization, then trapping the nonvolatile contaminants in a nonmobile phase (microencapsulation), and finally compacting the treated material into large soil bodies (macroencapsulation). This report summarizes the results of the DCR testing of soil-amended Basin F sludge from RMA. The primary focus of this study is on pesticide leachability. The DCR process used to treat the Basin F waste soil produced a dry, homogeneous, soil-like material with desirable physical properties that on compaction achieved the following remediation goals: reduction of all leachable volatiles to nondetectable levels, confinement of all metals to below RCRA TCLP levels, and a decrease in pesticide leachability to levels approaching RCRA standards. For example, endrin TCLP concentration was reduced from 74 μg/L to 20–28 μg/L (regulatory limit = 20 μg/L). In several cases, reductions in pesticide leachability could be attributed to simple dilution with the calcium oxide (CaO) reagent. However in other cases, microencapsulation and/or macroencapsulation also played a role in reducing pesticide leachability. Additional work is necessary to optimize the amounts of lime-milk, hydrophobic CaO, and benign oil used in the processing of RMA Basin F waste soils. Ideally, the optimum design should achieve the regulatory and client goals, while minimizing materials handling, energy, and reagent inputs. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/12203 |
| Appears in Collections: | Special Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| SR-97-3.pdf | 493.38 kB | Adobe PDF |  View/Open |