Comparison of BEA, USY and ZSM-5 for the quantitative extraction of polycyclic aromatic hydrocarbons from water samples

被引：21

作者：

Costa, Andreia A. ^{[2
]}

Wilson, Walter B. ^{[1
]}

Wang, Huiyong ^{[1
]}

Campiglia, Andres D. ^{[1
]}

Dias, Jose A. ^{[2
]}

Dias, Silvia C. L. ^{[2
]}

机构：

[1] Univ Cent Florida, Orlando, FL 32816 USA

[2] Univ Brasilia, Inst Quim, BR-70904970 Brasilia, DF, Brazil

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2012年 / 149卷 / 01期

关键词：

Zeolite; Water; Extraction; Polycyclic aromatic hydrocarbons; Adsorption; LOW-COST ADSORBENTS; MOLECULARLY IMPRINTED POLYMER; GRANULAR ACTIVATED CARBON; LAYERED DOUBLE HYDROXIDES; HEAVY-METALS; ZEOLITE-BETA; WASTE-WATER; ADSORPTION; REMOVAL; SORPTION;

D O I：

10.1016/j.micromeso.2011.06.016

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The physicochemical properties of three commercial zeolites - namely BEA, USY and ZSM-5 - are compared for the water removal of 15 PAHs included in the US EPA priority pollutants list. The best percentages of extraction were obtained with BEA and varied from 85.2 +/- 1.7% (benzo[g,h,i]perylene) to 99.6 +/- 1.1% (pyrene). The correlation of physicochemical properties to the percentages of extraction suggests that the predominant factor for a successful extracting performance is the adsorption of PAHs to the external surface of the extracting material. This process is facilitated by relatively large total pore volumes, large average pore diameters and a homogeneous distribution of Lewis acid sites. The presence of the latter enhances extraction performance via pi-electron interactions with the aromatic rings of the PAH. (C) 2011 Published by Elsevier Inc.

引用

页码：186 / 192

页数：7

共 43 条

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[Anonymous], 2002, ZEOLITES CLEANER TEC

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