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Cationic Organo-Montmorillonite for Efficient Concomitant Removal of Anionic Dyes in Single and Multi-components' solutions: Adsorption Characteristics and Mechanism Study

Article

Last updated: 01 Jan 2025

Subjects

-

Tags

Analytical chemistry

Abstract

This study aimed to create an organoclay [MMT@CTAB] by mixing the naturally occurring mineral montmorillonite [MMT] with the cationic surfactant cetyltrimethylammonium bromide [CTAB]. FTIR spectroscopy, elemental analysis and scanning electron microscopy [SEM] have been employed to analyze both the unmodified MMT and the MMT that has been modified using CTAB [MMT@CTAB]. The MMT@CTAB adsorbent was investigated for the removal of methyl orange (MO) and Rose Bengal (RB) anionic dyes (in single and/or in multi-components solutions) and additionally, in batch and column modes. Certain variables that impact the adsorption process, such as initial dye concentration, contact time, temperature, pH, and adsorbent dose, are evaluated. The kinetic investigation, which is characterized by a pseudo-second-order kinetic model, reveals that equilibrium adsorption of MO and RB dyes onto MMT@CTAB may be attained in 60 and 120 minutes, respectively. MO and RB were expected to achieve maximum adsorption efficiencies of 98.7 and 98.4%, respectively, at 100 and 150 mgL-1 concentrations, a dosage of 0.5 gL-1 adsorbent, and an initial pH of 7. In addition, Langmuir model best fits the sorption isotherm data, with the maximum adsorption capacity at 303 K being 203.25 mg g-1 for MO and 304.878 mg g-1 for RB, as shown by the non-linear form of Langmuir isotherm. Regenerated MMT@CTAB may be used for at least four more adsorption/desorption cycles, with ethanol indicating to be the most effective regeneration eluent. Each anionic dye was subjected to a binary systematic analysis. Since the adsorption of these anionic dyes onto MMT@CTAB was reduced when the temperature was increased, thermodynamic evidence suggests that adsorption is an exothermic, spontaneous process. The prepared cationic organoclay MMT@CTAB was successfully applied for the removal of MO and RB from real water samples and synthetic effluents with a recovery % more than 95%. The plausible adsorption mechanism of MO and RB onto MMT@CTAB is proposed to be due to electrostatic interaction and hydrogen bond formation. Finally, our study shows that MMT@CTAB may be employed efficiently and effectively to remove anionic dyes from a wide range of the collected real water samples.

DOI

10.21608/ejchem.2023.210347.7962

Keywords

organoclay, CTAB, methyl orange (MO), Rose Bengal (RB), Anionic dyes, Adsorption, Wastewater

Authors

First Name

Magda

Last Name

Akl

MiddleName

Ali

Affiliation

Professor of Analytical Chemistry, Faculty of Science, Mansoura University, Egypt

Email

magdaakl@yahoo.com

City

-

Orcid

-

First Name

Nora

Last Name

El-Mahdy

MiddleName

-

Affiliation

Mansoura University

Email

noraaaa215.nk@gmail.com

City

-

Orcid

-

First Name

Mohammed

Last Name

Al-Awadhi

MiddleName

M.H

Affiliation

Department of Chemistry, Faculty of Education & Science, Saba Region University, Marib, Yemen

Email

alawadhi208@yahoo.com

City

-

Orcid

-

First Name

Aya

Last Name

Mostafa

MiddleName

-

Affiliation

Mansoura University

Email

ayagamal1994@gmail.com

City

Mansoura

Orcid

-

Volume

67

Article Issue

1

Related Issue

44392

Issue Date

2024-01-01

Receive Date

2023-05-11

Publish Date

2024-01-01

Page Start

205

Page End

223

Print ISSN

0449-2285

Online ISSN

2357-0245

Link

https://ejchem.journals.ekb.eg/article_304236.html

Detail API

https://ejchem.journals.ekb.eg/service?article_code=304236

Order

304,236

Type

Original Article

Type Code

297

Publication Type

Journal

Publication Title

Egyptian Journal of Chemistry

Publication Link

https://ejchem.journals.ekb.eg/

MainTitle

Cationic Organo-Montmorillonite for Efficient Concomitant Removal of Anionic Dyes in Single and Multi-components' solutions: Adsorption Characteristics and Mechanism Study

Details

Type

Article

Created At

30 Dec 2024