Passive Reactive Barrier. Innovative Technology Summary Report

S&T Accomplishment Report · Fri Mar 01 04:00:00 EST 2002

DOI:https://doi.org/10.2172/794981· OSTI ID:794981

Passive reactive barriers are in situ water permeable barriers that possess properties that either alter or destroy contaminants of concern (COC's)in place (e.g. certain VOCs) or bind the COC (e.g. uranium) to the barrier material. The prime purpose of this technology is to change the remediation strategy from pumping (i.e. advection of ground water) to passive capture under natural gradients. Advective pumping can only remove the dissolved phase of contaminant. Diffusion from sorbed phases on soil particles will later dissolve and increase the time required for pumping. Hence, passive reactive barriers are a less energy-intensive approach to aquifer cleanup, without the hydrologic impacts of continued pumping. Depending on site conditions, the barrier media may be designed for continued (non-regenerated) use, or may be placed in a manner that permits retrieval for extraction of bound contaminants and regeneration and replacement of the media. Appropriate down-gradient blocks will alert operators when barrier replacement is required.

• Research Organization: Oak Ridge National Lab., TN (US)
• Sponsoring Organization: USDOE Office of Science and Technology (OST) (EM-50) (US)
• OSTI ID: 794981
• Report Number(s): DOE/EM-0623
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ACID
ADVECTION
AQUIFERS
CONTAMINANT
DIFFUSION
DRAINAGE
FUNNEL AND GATE
GROUND WATER
MINE
PASSIVE REACTIVE BARRIER
POLYETHYLENE
PROTECTIVE EQUIPMENT
PUMPING
REGENERATION
SCFA
SOILS
TRENCH
URANIUM
VOLITILE ORGANIC COMPOUNDS
WATER