Enhanced photodegradation of pentachlorophenol in a soil washing system under solar irradiation with TiO2 nanorods combined with municipal sewage sludge

被引：13

作者：

Zhou, Zeyu ^{[1
]}

Zhang, Yaxin ^{[2
]}

Wang, Hongtao ^{[1
]}

Chen, Tan ^{[1
]}

Lu, Wenjing ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Environm Sci & Engn, Beijing 100084, Peoples R China

[2] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2015年 / 201卷

基金：

中国国家自然科学基金;

关键词：

Photocatalytic degradation; TiO2 nanorods combined with municipal sewage sludge; Hydrophobic chlorinated aromatic pollutants (HCAPs); Natural solar light; CONTAMINATED SEDIMENTS; UV-LIGHT; DEGRADATION; REMEDIATION; PARTICLES; MECHANISM; SURFACES; PCB;

D O I：

10.1016/j.micromeso.2014.09.036

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A novel remediation method for soil contaminated with hydrophobic chlorinated aromatic pollutants (HCAPs) was developed using TiO2 nanorods combined with municipal sewage sludge in surfactant solution. The target contaminant washed into surfactant solution from polluted soil can be rapidly removed under natural sunlight irradiation. The photocatalyst synthesized by TiO2 combined with municipal sewage sludge by a hydrothermal process shows excellent ability in this situation. The TiO2 nanorods appear on the surface of municipal sewage sludge, which offers a new way of solving waste municipal sewage sludge disposal problem and of producing high-activity photocatalyst. The nanocomposite was characterized by SEM, X-ray diffraction, and UV-Vis DRS. Results showed that the new nanocomposite was better than the original TiO2 catalyst. Using the proposed method in this study, the target contaminant can be removed by up to 97% after 30 min of irradiation in natural sunlight, whereas the surfactant loss was only 27%. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：99 / 104

页数：6

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