POTENTIAL APPLICATION OF ZEOLITE/MNPS COMPOSITE  FOR THE REMOVAL OF CRYSTAL VIOLET IN AQUEOUS SOLUTION

Trần Nguyễn Phương Lan; Dương Thị Mỹ Tuyên; Lý Kim Phụng; Phùng Thị Hằng; Cao Lưu Ngọc Hạnh; Trần Thị Minh Thư; Nguyễn Minh Nhựt; Nguyễn Thị Như Ý

doi:10.34238/tnu-jst.8805

POTENTIAL APPLICATION OF ZEOLITE/MNPS COMPOSITE FOR THE REMOVAL OF CRYSTAL VIOLET IN AQUEOUS SOLUTION

About this article

Received: 23/09/23 Revised: 17/10/23 Published: 18/10/23

Authors

1. Tran Nguyen Phuong Lan , Can Tho University
2. Duong Thi My Tuyen, Can Tho University
3. Ly Kim Phung, Can Tho University
4. Phung Thi Hang, Can Tho University
5. Cao Luu Ngoc Hanh, Can Tho University
6. Tran Thi Minh Thu, Can Tho University of Technology
7. Nguyen Minh Nhut, Can Tho University
8. Nguyen Thi Nhu y, Can Tho University of Technology

Abstract

This research introduced a simple synthesis of zeolite/MNPs composite at conditions as follows: a weight ratio of MNPs:zeolite = 1:4 (w/w), a volume ratio of ethanol:H₂O = 1:10 (v/v), 5 mL tetraethyl orthosilicate (TEOs), 90^oC and 4 hours. Some analysis methods such as XRD, FTIR and SEM were used to determine the presence of MNPs and zeolite with the uniform shape, size and distribution. The chemical composition was analyzed using XRF with the content of SiO₂; Al₂O₃ and Fe₂O₃ of 41.11%; 27.75% and 30.78%, respectively. Moreover, the evaluation of crystal violet (CV) removal was implemented at pH ~ 7, CV dosage of 0.75 g/L, initial CV concentration of 100 mg/L and contact time of 30 minutes, the adsorption capacity and efficiency were 103.37 mg/g and 70.64%, respectively. The CV adsorption fitted with the Sips isotherm model and Elovich kinetic model. The adsorption mechanism is mainly to adsorb on the surface heterogeneously and a physical adsorption. The CV adsorption efficiency decreases from 70.64% to 42.26% after 5 cycles. The above results also reveal a potential application of zeolite/MNPs composite towards the wastewater treatment including organic dyes.

Keywords

Adsorption; Crystal violet; Sips isotherm model; Tetraethyl orthosilicate; Zeolite/MNPs

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DOI: https://doi.org/10.34238/tnu-jst.8805

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