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186823

Removal of Methylene Blue Dye from Aqueous Solutions by Bentonite and Cement Kiln Dust: Comparative Study of Adsorption Equilibrium, Kinetic, and Thermodynamic

Article

Last updated: 01 Jan 2025

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Subjects

-

Tags

Soil science

Abstract

This study compared the methylene blue (MB) removal from aqueous solution by natural bentonite (Bent) and cement kiln dust (CKD). Bentonite and CKD were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer Emmett Teller (BET) specific surface area, Fourier transform infrared (FTIR), and scanning electron microscopy (SEM). The comparison between bentonite and CKD in the removal of MB dye was investigated in different conditions including initial MB concentration, adsorbent doses, pH, salt concentration, and temperature by batch experiments. Adsorption kinetics results were fitted with fractional power, Elovich, pseudo-first-order, pseudo-second-order, and intra-particle diffusion equations. The pseudo-second-order model was well fitted for experimental results at the different tested initial concentrations (50-300 mgMB/L).  Equilibrium adsorption data were evaluated by Freundlich and Langmuir and Temkin models. The experimental results fitted very well by the Langmuir isotherm model. Bentonite exhibited the largest adsorption capacity (3257.33 mg/g) than CKD (2150.54 mg/g). Increasing the temperature from 298K to 323 oK convinced an increase of the adsorption of MB dye by both sorbents and the process was found to be endothermic and spontaneous. The obtained results indicated that both adsorbents are efficient and low-cost adsorbents for effective removal of MB dye with privilege in the efficiency for bentonite and with no cost for CKD.

DOI

10.21608/asejaiqjsae.2021.186823

Keywords

Bentonite, Cement kiln dust, methylene blue, kinetic and adsorption isotherm, Thermodynamic

Authors

First Name

Ahmed

Last Name

El Refaey

MiddleName

Abd El Khalek

Affiliation

Department of Soil & Water Science, Faculty of Desert and Environmental Agriculture, Matrouh University, Egypt

Email

ahmedelrefaey@alexu.edu.eg

City

-

Orcid

-

Volume

42

Article Issue

3

Related Issue

26297

Issue Date

2021-09-01

Receive Date

2021-06-10

Publish Date

2021-09-30

Page Start

629

Page End

644

Print ISSN

1110-0176

Online ISSN

2536-9784

Article File

ASEJAIQJSAE_Volume 42_Issue 3_Pages 629-644.pdf

PDF . 874.7kB

Link

https://asejaiqjsae.journals.ekb.eg/article_186823.html

Detail API

https://asejaiqjsae.journals.ekb.eg/service?article_code=186823

Order

5

Type

Original Article

Type Code

53

Publication Type

Journal

Publication Title

Alexandria Science Exchange Journal

Publication Link

https://asejaiqjsae.journals.ekb.eg/

MainTitle

Removal of Methylene Blue Dye from Aqueous Solutions by Bentonite and Cement Kiln Dust: Comparative Study of Adsorption Equilibrium, Kinetic, and Thermodynamic

Details

Type

Article

Created At

22 Jan 2023