Photodegradation of γ-HCH by α-Fe2O3 and the influence of fulvic acid

被引：33

作者：

Fu, HB ^{[1
]}

Quan, X ^{[1
]}

Zhao, HM ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Environm & Biol Sci & Technol, Dalian 116024, Peoples R China

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2005年 / 173卷 / 02期

基金：

中国国家自然科学基金;

关键词：

alpha-Fe2O3; gamma-HCH; fulvic acid; photodegradation; humic substances;

D O I：

10.1016/j.jphotochem.2005.01.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

The purpose of this study was to examine photodegradation of gamma-hexachlorocyclohexane (gamma-HCH) by alpha-Fe2O3 and the influence of fulvic acid (FA) in this photochemical process. A 300 W high-pressure mercury lamp was employed as the light source. The result showed that the UV light alone could play an important role in the degradation of gamma-HCH. The presence of alpha-Fe2O3 was found to promote the photodegradation of gamma-HCH. The photodegradation of gamma-HCH by alpha-Fe2O3 follows pseudo-first-order reaction kinetics. The effect of the FA on the photodegradation of gamma-HCH was also performed. The result revealed that the FA slowed the photodegradation rate of gamma-HCH. Oxidation products were also identified by gas chromatography with a mass spectroscopy detector. This process is of interest in both a remedial process induced by iron oxides in natural water surfaces and alpha-Fe2O3-mediated photodegradation method for purifying natural water containing gamma-HCH and humic substances. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：143 / 149

页数：7

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