Sorption of p-nitrophenol by anion-cation modified palygorskite

被引：51

作者：

Chang, Yue ^{[1
]}

Lv, Xueqian ^{[1
]}

Zha, Fei ^{[1
]}

Wang, Yonggang ^{[1
]}

Lei, Ziqiang ^{[1
]}

机构：

[1] NW Normal Univ, Coll Chem & Chem Engn, Lanzhou 730070, Gansu, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 168卷 / 2-3期

关键词：

Anion-cation modified palygorskite; p-Nitrophenol; Sorption; Isothermal sorption equation; Thermodynamics; Kinetics; AQUEOUS-SOLUTIONS; MODIFIED ATTAPULGITE; GRAFTED ATTAPULGITE; ADSORPTION; WATER; REMOVAL; SILICA; PHENOL; CLAY; ORGANOBENTONITE;

D O I：

10.1016/j.jhazmat.2009.02.105

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A series of anion-cation modified palygorskites were prepared by microwave irradiation, and characterized with FT-IR. Compared with natural palygorskite, the p-nitrophenol sorption capacity with anion-cation modified palygorskite was significantly improved. The maximum sorption capacity (137.74 mg g(-1))was obtained with the mass ratio 1:4 and 3:10 of hexadecyltrimethylammonium bromide to sodium dodecyl sulfate and the surfactant to palygorskite of at 313 K. The sorption equilibrium was in accordance with the Langmuir isothermal sorption equations. Thermodynamic function calculated showed that the sorption was a spontaneous and exothermic process. Free energy of the sorption increased with the increase of the temperature. The sorption of p-nitrophenol followed the pseudo-second-order process (sorption rate constant: 0.00453 mg(-1) min(-1)). (C) 2009 Published by Elsevier B.V.

引用

页码：826 / 831

页数：6

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