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SPATIAL DISTRIBUTION OF CARBON AND SULFUR PRECIPITATING WITHIN PERMEABLE REACTIVE BARRIERS: DEVELOPMENT OF ANALYTICAL METHODS
Citation:
Cloud, W. J. AND R T. Wilkin*. SPATIAL DISTRIBUTION OF CARBON AND SULFUR PRECIPITATING WITHIN PERMEABLE REACTIVE BARRIERS: DEVELOPMENT OF ANALYTICAL METHODS. Society of Physics Students/Zone 12 Meeting, ECU, Ada, OK, 11/17-18/2000.
Description:
A permeable reactive barrier (PRB) is a wall of porous reactive material placed in the path of a dissolved contaminant plume for the purpose of removing contaminants from ground water. Chemical processes within these reactive materials remove both inorganic and organic contaminants, but other chemical species including carbon and sulfur also precipitate. Over long periods of time, accumulations of carbon and sulfur precipitates can form and block the water flow through the PRB, changing the flow of the ground water and diminishing reactive barrier performance. Research efforts focus on determining the spatial and temporal distribution of carbon and sulfur precipitating within PRBs emplaced over four years ago. Analytical methods utilize coulometric titration for determining the amount of CO2, SO2, or H2S liberated from a sample after acid extraction.