Mineralization of bacterial cell mass on a photocatalytic surface in air
Mineralization of bacterial cell mass on a photocatalytic surface in air
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DOI：
10.1021/es980036f
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发表时间：
1998-09-01
影响因子：
11.4
通讯作者：
Fennell, JA
中科院分区：
文献类型：
--
作者：
Jacoby, WA;Maness, PC;Fennell, JA
沉积在二氧化钛涂层表面的整个细胞在空气中通过光催化被氧化为二氧化碳。这篇论文首次证明了整个细胞中的有机物可以被完全氧化。三种实验技术被用来监测这一反应：扫描电子显微镜、C-14放射性同位素标记和间歇反应器测量。扫描电子显微镜实验表明，大肠杆菌细胞团消失。碳-14放射性同位素标记实验证实，大肠杆菌的碳含量被氧化成二氧化碳，基本上关闭了质量平衡。间歇反应器实验证实了物质平衡，并提供了氧化反应速率的初步指示。这些结果提供了证据，证明用于消毒的光催化表面在空气-固体系统中也可以自清洁。
Whole cells deposited on a titanium dioxide-coated surface have been oxidized in air to carbon dioxide via photocatalysis. This paper provides the first evidence that the organic matter in whole cells can be completely oxidized. Three experimental techniques were employed to monitor this reaction: scanning electron microscopy, C-14 radioisotope labeling, and batch reactor measurements. The scanning electron microscopy experiments illustrate the disappearance of Escherichia coli cell mass. The C-14 radioisotope labeling experiments establish that the carbon content of E. coli is oxidized to form carbon dioxide with substantial closure of the mass balance. The batch reactor experiments corroborate the mass balance and provide a preliminary indication of the rate of the oxidation reaction. These results provide evidence that a photocatalytic surface used for disinfection can also be self-cleaning in an air-solid system.