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Activated Carbon-Based Technology for In Situ Subsurface Remediation

The U.S. EPA Office of Superfund Remediation and Technology Innovation recently published a fact sheet about an emerging remedial technology that applies a combination of activated carbon (AC) and chemical and/or biological amendments for in situ remediation of soil and groundwater contaminated by organic contaminants, primarily petroleum hydrocarbons and chlorinated solvents.  The technology typically is designed to carry out two contaminant removal processes: adsorption by AC and destruction by chemical and/or biological amendments.

With the development of several commercially available AC-based products, this remedial technology has been applied with increasing frequency at contaminated sites across the country, including numerous leaking underground storage tank (LUST) and dry cleaner sites (Simon 2015).  It also has been recently applied at several Superfund sites, and federal facility sites that are not on the National Priorities List.

The fact sheet provides information to practitioners and regulators for a better understanding of the science and current practice of AC-based remedial technologies for in situ applications. The uncertainties associated with the applications and performance of the technology also are discussed.

AC-based technology applies a composite or mixture of AC and chemical and/or biological amendments that commonly are used in a range of in situ treatment technologies.  Presently, five commercial AC-based products have been applied for in situ subsurface remediation in the U.S.: BOS-100® & 200® (RPI), COGAC® (Remington Technologies), and PlumeStop® (Regenesis) are the four most commonly used commercial products.  CAT-100® from RPI is the most recent product, developed based on BOS-100®.  One research group in Germany also developed a product called Carbo-Iron®.  The AC components of these products typically are acquired from specialized AC manufacturers.  These types of AC have desired adsorption properties for chlorinated solvents and petroleum hydrocarbons.  Different products also have different AC particle sizes, which determine the suitable injection approach and the applicable range of geological settings.

Example of powdered activated carbon “fracked” into the subsurface under high-pressure, causing preferential pathways into existing monitoring wells (Photo Credit: Regenesis)

 

CHAR Technologies Ltd. Announces Approval of $1 Million Grant

CHAR Technologies Ltd. (the “CHAR”) (YES – TSXV) is pleased to announce that it has been approved for a grant totalling $1 million provided by the Government of Ontario through the Ontario Centres of Excellence (“OCE”). The grant is in support of CHAR’s current SulfaCHAR production project, which has previously received funding and support from both Sustainable Development Technology Canada (“SDTC”) and the Canadian Gas Association (“CGA”).

“This grant will allow CHAR to both redeploy financial resources currently committed to the SulfaCHAR project, while at the same time will allow CHAR to expand the scope of the project,” said Andrew White, CEO of CHAR. “The funding recognizes the carbon-related benefits of the project, and will allow CHAR to more rapidly execute on the production and use of SulfaCHAR.”

Funding will be disbursed on completion of three milestones. CHAR has received initial funding of $237,759, and will receive three additional payments on milestone and project completion.

About CHAR
CHAR is in the business of producing a proprietary activated charcoal like material (“SulfaCHAR”), which can be used to removed hydrogen sulfide from various gas streams (focusing on methane-rich and odorous air). The SulfaCHAR, once used for the gas cleaning application, has further use as a sulfur-enriched biochar for agricultural purposes (saleable soil amendment product).

About OCE
Ontario Centres of Excellence (OCE) drives the commercialization of cutting-edge research across key market sectors to build the economy of tomorrow and secure Ontario’s global competitiveness. In doing this, OCE fosters the training and development of the next generation of innovators and entrepreneurs and is a key partner with Ontario’s industry, universities, colleges, research hospitals, investors and governments. OCE is a key partner in delivering Ontario’s Innovation Agenda as a member of the province’s Ontario Network of Entrepreneurs (ONE). Funded by the Government of Ontario, the ONE is made up of regional and sector-focused organizations and helps Ontario-based entrepreneurs rapidly grow their company and create jobs.