Synthesis and characterization of ZSM-5 zeolite from rice husk ash and their adsorption of Pb2+ onto unmodified and surfactant-modified zeolite

被引：89

作者：

Ali, Ibraheem Othman ^{[1
]}

Hassan, Ali Mostafa ^{[1
]}

Shaaban, Salah Mohamed ^{[1
]}

Soliman, Karam Seifelnasser ^{[1
]}

机构：

[1] Al Azhar Univ, Fac Sci, Dept Chem, Nasr City 11884, Cairo, Egypt

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2011年 / 83卷

关键词：

ZSM-5; Rice husk ash; XRD; FT-IR; Surfactant-modified zeolite; Pb2+ removal; AQUEOUS-SOLUTION; FLY-ASH; HYDROTHERMAL SYNTHESIS; REMOVAL; LEAD; CRYSTALLIZATION; TEMPERATURE; CATALYSTS; TEMPLATE; SILICA;

D O I：

10.1016/j.seppur.2011.08.034

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

Local rice husk ash was precleaned with chemical treatment using NaOH and HCl solutions and well incorporated with other components forming zeolites; under hydrothermal conditions, to synthesize ZSM-5. ZSM-5 zeolites were characterized with several techniques including XRD, FT-IR and N-2 adsorption. The effect of Na2O/SiO2 ratio, on ZSM-5 preparation was investigated. The results clearly show that Na+ cation plays a structure directing role as well as a charge balancing role. Lead binding was most effective when the zeolite was treated with surfactant solutions. TPABr-zeolite in aqueous suspension (10 g/L) sorbed up to 85% of Pb2+ from solutions containing 50-140 ppm Pb2+. The results suggested that TPABr modified zeolites had higher adsorption for Pb2+ than the unmodified zeolite or modified by n-PA or TBABr or CTAB. The adsorption conditions were optimized, and the mechanisms of adsorption are briefly discussed. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：38 / 44

页数：7

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