期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 87, 期 1-2, 页码 56-62出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2008.08.013
关键词
Heterogeneous photocatalysis; Titanium dioxide; Natural organic matter; Size exclusion chromatography; Bioavailability
资金
- German Technical and Scientific Association for Gas and Water (DVGW)
Herein we report on the photocatalytic degradation of natural organic matter from a bog lake (Lake Hohloh, Black Forest, Germany) as followed by size exclusion chromatography with dissolved organic carbon (DOC) and ultraviolet (lambda = 254 nm) detection (SEC-DOC and SEC-UV). When irradiating this humic-rich water in the presence of 0.5 g L-1 titanium dioxide (P25),we found a preferential degradation of the higher molecular weight DOC fraction. This was coupled to growth of the middle and small DOC fractions. Mineralization proceeded in two distinct steps: a first stage without noticeable mineralization, followed by a phase of steady decrease in dissolved organic carbon. Formic, oxalic, succinic and glutaric acids were found in the irradiated samples and contribute significantly to the bioavailable DOC after irradiation, which favors bacterial regrowth. (C) 2008 Elsevier B.V. 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