Removal of basic dye from aqueous medium using a novel agricultural waste material: Pumpkin seed hull

被引：155

作者：

Hameed, B. H. ^{[1
]}

El-Khaiary, M. I. ^{[2
]}

机构：

[1] Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia

[2] Univ Alexandria, Fac Engn, Dept Chem Engn, Alexandria 21544, Egypt

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 155卷 / 03期

关键词：

adsorption isotherm; kinetic; methylene blue; pumpkin seed hull; pore diffusion;

D O I：

10.1016/j.jhazmat.2007.11.102

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, pumpkin seed hull (PSH), an agricultural solid waste, is proposed as a novel material for the removal of methylene blue (MB) from aqueous solutions. The effects of the initial concentration, agitation time and solution pH were studied in batch experiments at 30 degrees C. The equilibrium process was described well by the multilayer adsorption isotherm. The adsorption kinetics can be predicted by the pseudo-first-order and the modified pseudo-first-order models. The mechanism of adsorption was also studied. It was found that for a short time period the rate of adsorption is controlled by film diffusion. However, at longer adsorption times, pore-diffusion controls the rate of adsorption. Pore diffusion takes place in two distinct regimes, corresponding to diffusion in macro- and mesopores. The results demonstrate that the PSH is very effective in the removal of MB from aqueous solutions. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：601 / 609

页数：9

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