Innocuous oil as an additive for reductive reactions involving zero valence iron

Conference · Tue Nov 01 00:00:00 EST 1994

OSTI ID:10124291

Cary, J W; Cantrell, K J

Reductive reactions involving zero valence iron appear to hold promise for in situ remediation of sites containing chlorinated hydrocarbon solvents and certain reducible metals and radionuclides. Treatment involves the injection of metallic iron and the creation of low levels of dissolved oxygen in the aqueous phase through oxidation of the metallic iron. The use of a biodegradable immiscible and innocuous organic liquid such as vegetable oil as an additive offers several intriguing possibilities. The oil phase creates a large oil-water interface that is immobile with respect to flow in the aqueous phase. This phase will act as a trap for chlorinated hydrocarbons and could potentially increase the reaction efficiency of reductive dehalogenation of chlorinated hydrocarbons by the metallic iron. When iron particles are suspended in the oil before injection they are preferentially held in the oil phase and tend to accumulate at the oil-water interface. Thus oil injection can serve as a mechanism for creating a stable porous curtain of metallic iron in the vadose to maintain a low oxygen environment which will minimize the consumption of the iron by molecular oxygen.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 10124291
• Report Number(s): PNL-SA-24315; CONF-941124-12; ON: DE95007159; TRN: AHC29508%%146
• Resource Relation: Conference: 33. Hanford symposium on health and the environment: symposium on in-situ remediation--scientific basis for current and future technologies,Richland, WA (United States),7-11 Nov 1994; Other Information: PBD: Nov 1994
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
54 ENVIRONMENTAL SCIENCES
IRON
FLUID INJECTION
ORGANIC CHLORINE COMPOUNDS
DECHLORINATION
CHROMATES
REDUCTION
REMEDIAL ACTION
ADDITIVES
URANATES
TECHNETATES
IN-SITU PROCESSING
REDOX REACTIONS
ORGANIC SOLVENTS
TECHNOLOGY ASSESSMENT
WASTE PROCESSING
VEGETABLE OILS
AQUIFERS
054000
540250
HEALTH AND SAFETY
SITE RESOURCE AND USE STUDIES