In-Situ Fenton-like Oxidation TCE DNAPL

• Main Authors: Hung Ming Wu, 吳鴻明
• Other Authors: Yeh Kuei-Jyum
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/29352407205090359413

碩士 === 國立屏東科技大學 === 環境工程與科學系 === 89 === Chlorinate solvents such as trichloroethylene (TCE) usually exist as dense non aqueous phase liquids (DNAPL) in the aquifer of contaminated sites. In-situ degradation techniques are generally more desirable in order to reduce the exposure and risk to the environment and human. In-situ Fenton-like oxidation was recently shown to effectively oxidize many organic pollutants. Trichloroethylene was used as a model DNAPL compound in this study. In-situ Fenton-like oxidation experiment was conducted with natural silica sand and the sand from aquifers of a hazardous waste dumping site. Data in batch experiments showed faster TCE DNAPL removal by Fenton-like oxidation than dissolution, indicated the capability of HO‧ to directly interact with contaminants existed as DNAPL. The results from column study showing that TCE DNAPL moved downward slowly along with the ground water flow. The oxidation efficiency of TCE DNAPL were 83% and 44% for aquifer sand of 20.08 g/kg extractable iron and natural silica sand of 0.4 g/kg extractable, respectively. Trichloroethylene removal was consistent with H2O2 depletion in column.