Bioremediation of soil contaminated with explosives. (Water Quality and Treatment 02:00 PM, Saturday, April 5, 2003 Brewer/Frost Science 138 Dr. Yung-Tse Hung-Presiding).

Hung, Yung-Tse ; Gubba, Sudheer ; Yeh, Ruth Yu-Li 等

4:00

This paper describes a study on the remediation of explosive contaminated soils by biodegradation processes. The objective was to determine the efficiency of biological treatment methods in removing organic pollutants from the explosive contaminated soils. Explosive contaminated soil can be treated with bioremediation, phytoremediation, solidification and stabilization, electrode assisted soil washing, treatment of organic waste using biopiles, membrane technologies, and surfactant enhanced treatment technologies. The biological treatment processes described in this study included soil slurry reactor and soil columns. The soil used in this study had an organic carbon content of 4 to 5%. Soil columns used in the study contained soil of effective size of 0.1 mm and a uniformity coefficient of 4.3. Soil used in the study was mainly contaminated with 4000 to 12,000 mg TNT (2,4,6-trinitrotoluene)/kg soil, 6 to 12 mg N[O.sub.3]/kg soil: The soil slurry reactors were operated with 15% (w/v) TNT contaminated soil. Molasses was used as a co-substrate to enhance bacterial growth in both soil slurry reactor and soil column. Results indicated that after 4 months of treatment in a slurry reactor, the TNT metabolite concentration was less than 20 mg/kg. For the soil column the TNT was reduced to 0.5 mg/kg after 305 days of treatment from the initial TNT concentration of 3839 mg/kg. Soil slurry reactor was found to be an effective method for remediation of explosive contaminated soil.

YUNG-TSE HUNG Y.HUNG@CSUOHIO.EDU AND SUDHEER GUBBA GUSUDHEER@HOTMAIL.COM, CIVIL AND ENVIRONMENTAL ENGINEERING DEPT, CLEVELAND STATE UNIVERSITY, CLEVELAND OH 44215-2214, RUTH YU-LI YEH, CHEMICAL ENGINEERING DEPT, MING-HSIN UNIVERSITY OF SCIENCE AND TECHNOLOGY, HSINCHU, TAIWAN