Sunflower seed shells: A novel and effective low-cost adsorbent for the removal of the diazo dye reactive black 5 from aqueous solutions

被引：147

作者：

Osma, Johann F. ^{[1
]}

Saravia, Veronica ^{[1
]}

Toca-Herrera, Jose L. ^{[1
]}

Couto, Susana Rodriguez ^{[1
]}

机构：

[1] Univ Rovira & Virgili, Dept Chem Engn, Tarragona 43007, Spain

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 147卷 / 03期

关键词：

adsorption isotherms; adsorption kinetics; intra-particle diffusion; mandarin peelings; pseudo-second-order kinetics; reactive black 5; sunflower seed shells;

D O I：

10.1016/j.jhazmat.2007.01.112

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 paper, the potential of two low-cost adsorbents such as sunflower seed shells (SS) and mandarin peelings (MP) in the removal of the synthetic anionic dye Reactive Black 5 (RB5) from aqueous solutions was investigated. SS led to a percentage of dye removal higher than MP (85% and 71% after 210 min, respectively, for an initial RB5 concentration of 50 mgL(-1) and an initial pH of 2.0). The rate of adsorption followed a pseudo-second-order kinetic model and the intra-particle diffusion was found to be the rate-controlling stage. In addition, the equilibrium data fitted well both the Freundlich and multilayer adsorption isotherm equations indicating the heterogeneity of the adsorbent surface. This was also corroborated by the SEM photographs. On the whole, the results in this study indicated that SS were very attractive materials for removing anionic dyes from dyed effluents. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：900 / 905

页数：6

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