期刊
CHEMOSPHERE
卷 83, 期 5, 页码 652-660出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2011.02.027
关键词
Biodegradation; Biodiesel; Biodiesel blend; Degradation rates; Temperature
资金
- USGS NIWR
- UAF
Bioremediation of sandy soil contaminated with fish-biodiesel, conventional diesel, and blends of both was studied in microcosm experiments at different temperatures, simulating the subarctic environment. While distinct lag, exponential, and stationary phases were observed at 20 degrees C, degradation at 6 degrees C was slow and the lag phase continued throughout the 4-week experiment. A three-phase 1st order kinetic model successfully described respiration at 20 degrees C, a one-phase model was sufficient at 6 degrees C. For temperatures fluctuating between similar to 6 and similar to 20 degrees C, higher than expected microbial activity persisted at 6 degrees C for several days, due to the presence of active cultures, even though the soil temperature closely followed the air temperature. At 20 degrees C, respiration peaked already after 1 week, and 18-51% of the initially added fuel was mineralized within 4 weeks, whereby degradation was higher at higher biodiesel percentages. Biodiesel addition accelerated mineralization of blends with regular diesel beyond expectations. In blends with 20% biodiesel, the degradation rate constant was twice as high as for conventional diesel. These synergistic effects are likely due to an active microbial population. Addition of biodiesel to conventional diesel could reduce the impact of diesel spills. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据