Equilibrium and thermodynamics studies for decolorization of Reactive Black 5 (RB5) by adsorption onto MWCNTs

被引：46

作者：

Bazrafshan, Edris ^{[1
]}

Mostafapour, Ferdos Kord ^{[1
]}

Rahdar, Somaiieh ^{[1
]}

Mahvi, Amir Hossein ^{[2
,3
,4
]}

机构：

[1] Zahedan Univ Med Sci, Hlth Promot Res Ctr, Zahedan, Iran

[2] Univ Tehran Med Sci, Sch Publ Hlth, Tehran, Iran

[3] Univ Tehran Med Sci, Inst Environm Res, Ctr Solid Waste Res, Tehran, Iran

[4] Univ Tehran Med Sci, Natl Inst Hlth Res, Tehran, Iran

来源：

DESALINATION AND WATER TREATMENT | 2015年 / 54卷 / 08期

关键词：

Decolorization; Reactive Black 5; Adsorption; MWCNTs; AQUEOUS-SOLUTION; ACTIVATED CARBON; DYE REMOVAL; DYE/SALT MIXTURES; CONGO RED; KINETICS; MECHANISM; SORPTION; SLUDGE; ADSORBENTS;

D O I：

10.1080/19443994.2014.895778

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

At present study, multi-walled carbon nanotubes were used as an adsorbent for Reactive Black 5 (RB5) removal from aqueous solutions. The influence of important parameters including initial pH, concentration of dye, contact time, adsorbent dosage, and temperature has been investigated in order to find the optimum adsorption conditions. The results show that all the parameters have a strong effect on the adsorption of RB5 onto adsorbent. Adsorption kinetics was best described by the pseudo-second-order model. In addition, equilibrium data were better represented by Freundlich isotherm among Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich equilibrium isotherm models. The negative values of free-energy change confirmed the feasibility of the process and the spontaneous nature of adsorption. Furthermore, from the magnitude of H, the process was found to be endothermic physisorption.

引用

页码：2241 / 2251

页数：11

共 53 条

[1] Adsorption of dyes using shale oil ash [J].