Application of excitation-emission fluorescence matrices and UV/Vis absorption to monitoring the photocatalytic degradation of commercial humic acid

被引：113

作者：

Valencia, Sergio ^{[1
]}

Marin, Juan M. ^{[1
]}

Restrepo, Gloria ^{[1
]}

Frimmel, Fritz H. ^{[2
]}

机构：

[1] Univ Antioquia, Medellin, Colombia

[2] KIT, Engler Bunte Inst, BereichWasserChem, D-7631 Karlsruhe, Germany

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2013年 / 442卷

关键词：

Humic acids; Heterogeneous photocatalysis; Fluorescence spectroscopy; Excitation-emission matrix; NATURAL ORGANIC-MATTER; MOLECULAR-SIZE DISTRIBUTION; DISINFECTION BY-PRODUCTS; DRINKING-WATER TREATMENT; HETEROGENEOUS PHOTOCATALYSIS; ADVANCED OXIDATION; SPECTROSCOPY; REMOVAL; ADSORPTION; PARAMETERS;

D O I：

10.1016/j.scitotenv.2012.10.058

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study reports the use of excitation-emission matrix (EEM) fluorescence and UV/Vis spectroscopy to monitor the changes in the composition and reactivity of Aldrich humic acids (Aldrich HA) as a model compound for natural organic matter (NOM) during photocatalytic degradation. Degussa P-25 titanium dioxide (TiO2) and a solar UV-light simulator (a batch reactor) were used. The photocatalysis shifted the fluorescence maxima of EEMs of Aldrich HA toward shorter wavelengths, which implied that the photocatalytic degradation of commercial Aldrich HA caused the breakdown of high molecular weight components and the formation of lower molecular weight fractions. In addition, the fluorescence intensity of fulvic- and humic-like Aldrich HA presented a strong correlation with dissolved organic carbon (DOC), specific UV absorbance (SUVA) parameters, trihalomethane formation potential (THMFP), and organically bound halogens absorbable on activated carbon formation potential (AOXFP). Fluorescence spectroscopy was shown to be a powerful tool for monitoring of the photocatalytic degradation of HA. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：207 / 214

页数：8

共 48 条

[1]

[Anonymous], 2011, ENCY ENV HLTH

[2]

[Anonymous], 1996, 1485 EN

[3] Tracking natural organic matter (NOM) in a drinking water treatment plant using fluorescence excitation-emission matrices and PARAFAC [J].