Permeable Reactive Barriers, Permeable Treatment Zones, and Application of Zero-Valent Iron
Training
Upcoming Permeable Reactive Barrier Courses and Conferences and Archived Online Events
CLU-IN's Upcoming Courses and Conferences area features events related to innovative treatment and site characterization technologies, while the CLU-IN Studio contains live and archived videos, internet seminars, and conference webcasts.
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Biofilms As Biobarriers
J. Lennox and J. Ashe.
The American Biology Teacher, Vol 71 No 1, p 20-26, Jan 2009
One of the defining characteristics of biofilms is the production of a slimy matrix made of polysaccharide, protein, and sometimes DNA. This extracellular polymeric substance (EPS) accumulates on the hulls of ships, in industrial pipes, and on teeth. Microbiologists and engineers recently have been looking at biofilms and their EPS production as a means of solving serious environmental pollution problems. When injected into the soil and fed an appropriate diet, organisms will grow and plug the interstices between soil particles with EPS. If drill holes are sited in advance of a plume of contaminated groundwater, the EPS 'biobarrier' can reduce the rate of flow significantly. Through the formation of a reactive biobarrier, biofilm-forming consortia can reduce the concentration of the toxic compound concerned (e.g., crude oil, PAHs, pentachlorophenol) as well as its spread. This paper presents information and an exercise intended to illustrate the seamlessness of the intersection between the theory of microbiology and the practice of environmental protection.
Nanoscale Zero Valent Iron Training Tool
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website, 32 pp.
PRB Data Sheet
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website.
This data sheet supports the Training Tool by briefly addressing PRB configurations, construction methods, monitoring considerations, and advantages and disadvantages of the technology.
PRB Training Tool
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website.
This tool summarizes the history and key scientific concepts associated with the use of PRBs and reviews the steps necessary for PRB implementation at a field site. It provides key information in the following areas: (1) appropriate sites for PRB installation, (2) available design and construction techniques, (3) expected lifespan and economic benefits estimation, and (4) monitoring programs to track PRB performance and help comply with regulatory guidelines.
Permeable Mulch Biowalls
U.S. Navy, Naval Facilities Engineering Command, Environmental Restoration Technology Transfer, Multimedia Training Tools website.
A biobarrier provides a biologically active treatment zone rather than the chemically reactive treatment zone commonly found in PRB technology. This Web tutorial reviews design and installation considerations for permeable mulch biowalls and highlights case study results at Navy and Air Force sites.
