Adsorptive removal of Congo red, a carcinogenic textile dye, from aqueous solutions by maghemite nanoparticles

被引：579

作者：

Afkhami, Abbas ^{[1
]}

Moosavi, Razieh ^{[1
]}

机构：

[1] Bu Ali Sina Univ, Fac Chem, Hamadan, Iran

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 174卷 / 1-3期

关键词：

Congo red adsorption; Maghemite nanoparticles; Waste water samples; IRON-OXIDE NANOPARTICLES; MAGNETIC NANOPARTICLES; ACTIVATED CARBON; EQUILIBRIUM; PARTICLES; WATER; ACID; NI(II); CU(II);

D O I：

10.1016/j.jhazmat.2009.09.066

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of Congo red (CR) onto maghemite nanoparticles (gamma-Fe2O3) and its desorption was investigated. The adsorption capacity was evaluated using both the Langmuir and Freundlich adsorption isotherm models. Maghemite nanoparticles (gamma-Fe2O3) were prepared easily in a surfactant-less microemulsion by co-precipitation method. The size of the produced maghemite nanoparticles was determined by X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM). Synthesized maghemite nanoparticles showed the highest adsorption capacities of CR compared to many other adsorbents and would be a good method to increase adsorption efficiency for the removal of CR in a wastewater treatment process. The maximum adsorption occurred at pH 5.9. The Langmuir adsorption capacity (q(max)) was found to be 208.33 mg g(-1) of the adsorbent. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：398 / 403

页数：6

共 47 条

[1] Effect of the impregnation of carbon cloth with ethylenediaminetetraacetic acid on its adsorption capacity for the adsorption of several metal ions [J].