STUDY ON THE AMMONIUM ADSORPTION CAPACITY IN WATER  OF A COMPOSITE MATERIAL OF MnFe2O4 AND ACTIVATED CARBON DERIVED FROM COFFEE HUSK

Phạm Quang Huy; Nguyễn Thị Ngọc Ánh; Nguyễn Thị Hiền; Hà Thùy Linh; Hoàng Thảo Đan; Lê Phương Linh; Nguyễn Phương Anh; Đỗ Thị Thanh Ngân; Đỗ Thủy Tiên

doi:10.34238/tnu-jst.12099

STUDY ON THE AMMONIUM ADSORPTION CAPACITY IN WATER OF A COMPOSITE MATERIAL OF MnFe2O4 AND ACTIVATED CARBON DERIVED FROM COFFEE HUSK

About this article

Received: 20/02/25 Revised: 28/03/25 Published: 04/04/25

Authors

1. Pham Quang Huy, Hanoi Pedagogical University 2
2. Nguyen Thi Ngoc anh, Hanoi Pedagogical University 2
3. Nguyen Thi Hien, Hanoi Pedagogical University 2
4. Ha Thuy Linh, Hanoi Pedagogical University 2
5. Hoang Thao Dan, Hanoi Pedagogical University 2
6. Le Phuong Linh, Hanoi Pedagogical University 2
7. Nguyen Phuong Anh, Hanoi Pedagogical University 2
8. Do Thi Thanh Ngan, Hanoi Pedagogical University 2
9. Do Thuy Tien , Hanoi Pedagogical University 2

Abstract

In this study, a composite materials between MnFe₂O₄ and activated carbon from coffee husks (denoted MFO/ACF) was synthesized using co-precipitate and hydrothermal methods for the removal of ammonium from aqueous solutions. The characteristics of MFO/ACF were characterized evaluated by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FTIR). The ammonium adsorption process of MFO/ACF was investigated through batch experiments, assessing parameters such as solution pH, contact time and initial ammonium concentration. The results show that ammonium could be removed well by using MFO/ACF due to electrostatic attraction and functional groups on the surface of composite materials. The maximum ammonium adsorption capacity of MFO/ACF calculated according to the Langmuir model was 55.13 mg.g^-1 at pH 6, material dosage of 0.6 g.L^-1 and contact time of 20 minutes. Adsorption kinetics studies showed that the ammonium adsorption kinetics by MFO/ACF composite materials were best described by the second-order kinetic model. This showed that the mechanism of the process was mainly chemical adsorption. The MFO/ACF composite material promises to be a material capable of treating ammonium in water quite well.

Keywords

MnFe2O4; Ammonium; Coffee husk; Activated carbon; Composite material

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DOI: https://doi.org/10.34238/tnu-jst.12099

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