In Situ Remediation of DNAPLs by coupling cosolvent flushing and hydrogen peroxide: contribution of reductive reactions on contaminant transformation

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In a report released in 2014, the Parliamentary Budget Officer of Canada estimated that, despite two decades of investment in remediation efforts, Canada still has over 22,000 federal hazardous waste sites that will require an additional $4.9 billion of remediation cost. The report also indicated that Dense Non-Aqueous Phase Liquids (DNAPLs), such as chlorinated solvents and polychlorinated biphenyls, were among the most prevalent contaminants at those sites. To date, however, the remediation of DNAPLs has been challenging because these compounds are often located far below the surface, sparingly soluble in water, and relatively recalcitrant. Thus, our research program aims to develop an innovative approach that can expedite DNAPLs removal and reduce remediation cost.