このエントリーをはてなブックマークに追加
ID 20582
本文ファイル
著者
Alcantara-Garduno, Martha E.
Suzuki, Masahiro
Matsui, Chikara
Kose, Tomohiro
Okada, Mitsumasa
キーワード
n-dodecane
remediation
support media
surfactant
temperature
NDC
地球科学・地学・地質学
抄録(英)
Techniques for enhancing the biodegradation of oil-contaminated fine soils in a slurry-phase bioreactor were investigated. Using a model system consisting of kaolin particles containing adsorbed n-dodecane as a diesel fuel surrogate, we investigated how increasing the temperature and adding a surfactant and various hydrophobic support media affected the biodegradation rate of n-dodecane. Increasing the temperature from 25 to 35°C decreased the time required for complete degradation of n-dodecane by 30%, from 110 h to 80 h. Addition of the surfactant polyethylene glycol p-1,1,3,3-tetramethylbutylphenyl ether decreased the degradation time to less than 48 h at 35°C, although a high concentration of the surfactant (3000 mg l-1) was required. We suspect that the surfactant increased the degradation rate by solubilizing the n-dodecane into the solution phase in which the microorganisms were suspended. We tested five types of organic polymers as support media for the microorganisms and found that the biodegradation time could be reduced by approximately 50% with a support medium made from polyurethane; in the presence of this medium, only 36 h was required for complete decomposition at 35°C. The reduction in the degradation time was probably due to transfer of the n-dodecane from the soil to the support medium, which improved contact between the n-dodecane and the microorganisms. The polyurethane support medium bearing the microorganisms was stable and could be reused.
掲載誌名
Chemosphere
68巻
2号
開始ページ
281
終了ページ
286
出版年月日
2007-06
出版者
Pergamon-Elsevier Science Ltd.
ISSN
0045-6535
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 Elsevier Ltd
関連情報URL
部局名
工学研究科
環境安全センター