In Situ Bioremediation of Carbon Tetrachloride: Field Test Results

Autor:	Brian S. Hooker, Daniel B. Anderson, Brent M. Peyton, Christian D. Johnson, Rodney S. Skeen, Michael J. Truex
Rok vydání:	1998
Předmět:	geography Denitrification geography.geographical_feature_category Fouling Radiochemistry In situ bioremediation Plume chemistry.chemical_compound Denitrifying bacteria chemistry Nitrate Environmental chemistry Carbon tetrachloride General Environmental Science Water well
Zdroj:	Bioremediation Journal. 1:181-193
ISSN:	1547-6529 1088-9868
DOI:	10.1080/10889869809351334
Popis:	Results of a 7-month field test of in situ bioremediation of carbon tetrachloride (CT) under denitrifying conditions are reported. The demonstration was conducted in a portion of a several-square-mile CT and nitrate plume. Pretest CT and nitrate levels were 12.5 ± 0.14 μM and 3.87 ± 0.26 mM, respectively. During the test, the CT concentration dropped by 3.71 ± μM, representing an estimated total of 1.42 kg of CT destroyed. The total quantities of acetate and nitrate injected during the demonstration were 221 and 300 kg, respectively. Nitra injection was composed of short-duration, high-concentration pulses added with acetate pulses, and continuously injected nitrate that was present in the surrounding groundwater. Biomass was distributed successfully within the flow field without fouling the injection well. Levels of planktonic denitrifiers increased 10- and 5-fold in monitoring wells 3 and 6 m downstream from the injection well, respectively. A distributed growth pattern was indicated through re...
Databáze:	OpenAIRE
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