Preparation and characteristics of carbon-supported platinum catalyst and its application in the removal of phenolic pollutants in aqueous solution by microwave-assisted catalytic oxidation

被引：58

作者：

Bo, Longli ^{[1
]}

Quan, Xie ^{[2
]}

Wang, Xiaochang ^{[1
]}

Chen, Shuo ^{[2
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China

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

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 157卷 / 01期

关键词：

microwave; catalytic oxidation; granular activated carbon; platinum; phenolic pollutants;

D O I：

10.1016/j.jhazmat.2007.12.111

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Granular activated carbon-supported platinum (Pt/GAC) catalysts were prepared by microwave irradiation and characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD). Pt particles dispersing onto the surface of GAC could be penetrated by microwave and acted as "reaction centre" in the degradations of p-nitrophenol (PNP) and pentachlorophenol (PCP) in aqueous solution by microwave-assisted catalytic oxidation. The reaction was carried out through a packed bed reactor under ambient pressure and continuous flow mode. Under the conditions of microwave power 400 W, influent flow 6.4 mL min-' and air flow 120 mL min', phenolic solutions with high concentration (initial concentrations of PNP and PCP solutions were 1469 and 1454 mg L- 1, respectively) were treated effectively by PUGAC, 86% PNP and 90% PCP were degraded and total organic carbon (TOC) removal reached 85% and 71 %, respectively. Compared with GAC, loaded Pt apparently accelerated oxidative reaction so that PUGAC had a better degrading and mineralizing efficiencies for PNP. Hydraulic retention time was only 16 min in experiment, which was shortened greatly compared with catalytic wet air oxidation. Pyrolysis and oxidation of phenolic pollutants occurred simultaneously on the surface of PUGAC by microwave irradiation. (c) 2008 Elsevier 13N. All rights reserved.

引用

页码：179 / 186

页数：8

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