期刊
BIOTECHNOLOGY AND BIOENGINEERING
卷 112, 期 9, 页码 1792-1800出版社
WILEY
DOI: 10.1002/bit.25605
关键词
pyridine; mono-oxygenation reaction; electron donors
资金
- National Natural Science Foundation of China [50978164]
- Key project of basic research in Shanghai [11JC1409100]
- State Key Joint Laboratory of Environment Simulation and Pollution Control [13K09ESPCT]
- Special Foundation of Chinese Colleges and Universities Doctoral Discipline [20113127110002]
- United States National Science Foundation [0651794]
Employing an internal circulation baffled biofilm reactor (ICBBR), we evaluated the mechanisms by which photolysis accelerated the biodegradation and mineralization of pyridine (C5H5N), a nitrogen-containing heterocyclic compound. We tested the hypothesis that pyridine oxidation is accelerated because a key photolysis intermediate, succinate, is as electron donor that promotes the initial mono-oxygenation of pyridine. Experimentally, longer photolysis time generated more electron-donor products (succinate), which stimulated faster pyridine biodegradation. This pattern was confirmed by directly adding succinate, and the stimulation effect occurred similarly with addition of the same equivalents of acetate and formate. Succinate, whether generated by UV photolysis or added directly, also accelerated mono-oxygenation of the first biodegradation intermediate, 2-hydroxyl pyridine (2HP). 2HP and pyridine were mutually inhibitory in that their mono-oxygenations competed for internal electron donor; thus, the addition of any readily biodegradable donor accelerated both mono-oxygenation steps, as well as mineralization. Biotechnol. Bioeng. 2015;112: 1792-1800. (c) 2015 Wiley Periodicals, Inc.
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