tailieunhanh - AEROBIC BIODEGRADATION OF ORGANIC CHEMICALS IN ENVIRONMENTAL MEDIA: A SUMMARY OF FIELD AND LABORATORY STUDIES

Hydrogen peroxide and catalyst solutions needed for Fenton's Reagent are usually added to the treatment area by pressure injection into one or more designated chemical oxidation injection wells, or gravity injection into one or more monitoring or other wells. In pressure injection, compressed air is used to sparge the ferrous iron catalyst and relatively large volumes of peroxide solution (., hundreds to thousands of gallons) into the contaminated soil and groundwater over a short period of time (., days). The sparged air forces the chemical reactants down the injection well point(s) and out into the impacted saturated soil. This is an aggressive approach that poses. | AEROBIC BIODEGRADATION OF ORGANIC CHEMICALS IN ENVIRONMENTAL MEDIA A SUMMARY OF FIELD AND LABORATORY STUDIES Prepared by Dallas Aronson Mario Citra Kirsten Shuler Heather Printup Philip H. Howard Environmental Science Center Syracuse Research Corporation 6225 Running Ridge Road North Syracuse NY 13212-2509 Prepared for Eric J. Weber . Environmental Protection Agency Office of Research and Development Athens GA 30605 TABLE OF CONTENTS 1. 2. TECHNICAL . Literature . Definition and Use of Biodegradation Rate . Zero-Order Rate . First-Order Rate . Mineralization Rate Constants Versus Primary Biodegradation Rate Constants .5 . Calculation of First-Order Rate Constants .6 . Laboratory . Field and in situ Microcosm Studies .8 3. RESULTS .10 . BTEX . . . . . . p-Xylene .66 . PAH Polycyclic Aromatic Hydrocarbon . . Fluorene .83 . Benzo a . . . . Benzo a . Chlorinated Aliphatic Compounds .115 . . . Phenol and Substituted Phenols .122 . . Miscellaneous. . Bis 2-ethylhexyl phthalate. . Methanol. 4. SUMMARY. 5. REFERENCES . .151 .151 .158 .161 .