Removal of Reactive Red 198 from aqueous solution by combined method multi-walled carbon nanotubes and zero-valent iron: Equilibrium, kinetics, and thermodynamic

Sudabeh Pourfadakari; Nader Yousefi; Amir Hossein Mahvi

doi:10.1016/j.cjche.2016.04.027

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Removal of Reactive Red 198 from aqueous solution by combined method multi-walled carbon nanotubes and zero-valent iron: Equilibrium, kinetics, and thermodynamic

Chemical Engineering Thermodynamics | Updated：2026-01-06

- Removal of Reactive Red 198 from aqueous solution by combined method multi-walled carbon nanotubes and zero-valent iron: Equilibrium, kinetics, and thermodynamic
- Chinese Journal of Chemical Engineering Vol. 24, Issue 10, Pages: 1448-1455(2016)
- Affiliations：
  
  1. Department of Environmental Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz,Iran
  2. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran,Iran
  3. Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran,Iran
  4. National Institute of Health Research, Tehran University of Medical Sciences, Tehran,Iran
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.04.027
  CLC：
- Published：2016
- Accepted：
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Sudabeh Pourfadakari, Nader Yousefi, Amir Hossein Mahvi. Removal of Reactive Red 198 from aqueous solution by combined method multi-walled carbon nanotubes and zero-valent iron: Equilibrium, kinetics, and thermodynamic[J]. , 2016, 24(10): 1448-1455.
DOI：

Sudabeh Pourfadakari, Nader Yousefi, Amir Hossein Mahvi. Removal of Reactive Red 198 from aqueous solution by combined method multi-walled carbon nanotubes and zero-valent iron: Equilibrium, kinetics, and thermodynamic[J]. , 2016, 24(10): 1448-1455. DOI： 10.1016/j.cjche.2016.04.027.

摘要

Abstract

Dyes often include toxic

carcinogenic compounds and are harmful to humans' health. Therefore

removal of dyes fromtextile industry wastewater is essential. The present study aimed to evaluate the efficiency of the combination of zero valent iron (ZVI) powder and multi-walled carbon nanotubes (MWCNTs) in the removal of Reactive Red 198 (RR198) dye from aqueous solution. This applied research was performed in a batch system in the laboratory scale. This study investigated the effect of various factors influencing dye removal

including contact time

adsorbent dose

iron powder dose

initial dye concentration

and temperature. The equilibrium adsorption data were analyzed using three common adsorption models:Langmuir

Freundlich and Temkin. Besides

kinetic and thermodynamic parameterswere used to establish the adsorption mechanism. The results showed

in pH=3

contact time=100min

ZVI dose=5000mg·L

-1

andMWCNTs dose=600 mg·L

-1

in 100mg·L

-1

dye concentration

the adsorption efficiency increased to 99.16%. Also

adsorption kinetics was best described by the pseudo-second-ordermodel. Equilibriu

mdata fitted wellwith the Freundlich isotherm(

=0.99). The negative values of Δ

and the positive value of Δ

(91.76) indicate that the RR198 adsorption process is spontaneous and endothermic. According to the results

the combination of MWCNTs and ZVI was highly efficient in the removal of azo dyes.

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