This document is an attempt to compile worldwide research efforts and applications in the field of permeable reactive barriers (PRB). The listing will evolve as input is received. Apologies are made for any inadvertent omissions or errors. Typically, many people are responsible for a project; however, for simplicity, a single contact is provided for each project. Research projects are organized by the type of contamination treated (organics or inorganics) and by the type of reaction process (sorption, precipitation, substitution, or degradation), and then by the specific material. Field projects are organized by state, province, or country. A PRB is defined by the Remediation Technology Development Form (RTDF) Action Team on Permeable Barriers as Aa passive in situ treatment zone of reactive material that degrades or immobilizes contaminants as ground water flows through it.@ Projects that appear to fit this definition are included.
Site Description: An active electronic manufacturing facility had an on-site TCE handling unit that was active for 10 years. During this time, approximately 1,365 gallons of solvent was released, which created an approximate 16 acre plume in saprolite and bedrock.
Contaminants: Primarily TCE at concentrations greater than 200,000 ug/L in the source area with concentrations of 13,000 ug/L at the property boundary.
Remedial Challenge: The site challenges included high TCE concentrations, low permeability saprolite,...
Reactive Barrier Wall solves space and on-going activity problems during remediation project“Name Removed”, was contracted to install a passive reactive barrier wall in “Name Removed”. The wall was designed to remediate groundwater containing tetrachloroethylene (TCE). What made this job unique was the site location. Installation would occur in an operating commercial centre where site parameters were tight and commercial business operations had to continue during the installation.The site...
This research was conducted to investigate in situ treatment of leachate by pilot-scale permeable reactive barrier (PRB) with vegetation. Two different types of PRB media, with and without the presence of ferric chloride sludge, for the removal of pollutants were examined. The composite media of PRB comprised a clay and sand mixture of 40:60%w/w (system 1) and a clay, ferric chloride sludge and sand mixture of 30:10:60%w/w (system 2). The system was operated at a hydraulic loading rate of 0.028...
Site RemediationThe Spolchemie site was chosen as one of the NanoRem case study sites, to test two types of nanoparticles (NPs) (zerovalent iron - nZVI and iron oxide NPs) for in situ remediation of BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) contamination. Nanoremediation was seen as an opportunity to enhance the in situ biodegradation of the BTEX contaminants and to reduce the current remediation method of skimming free product from the groundwater surface waters and contining the use of a pump and...
In situ remediation of ammonium-contaminated groundwater is possible through a zeolite permeable reactive barrier (PRB); however, zeolite's finite sorption capacity limits the long-term field application of PRBs. In this paper, a pilot-scale PRB was designed to achieve sustainable use of zeolite in removing ammonium (NH4+-N) through sequential nitrification, adsorption, and denitrification. An oxygen-releasing compound was added to ensure aerobic conditions in the upper layers of the PRB where...
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