Volume 17, Issue 4 (3-2025)
ijhe 2025, 17(4): 651-672 |
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Jafari S, Javid A H, Moniri E, Hassani A H, Ahmad Panahi H. Design of three-dimensional magnetically modified graphene oxide nanoparticles for humic acid removal from aqueous media. ijhe 2025; 17 (4) :651-672
URL: http://ijhe.tums.ac.ir/article-1-6809-en.html
URL: http://ijhe.tums.ac.ir/article-1-6809-en.html
Sanaz Jafari1 
, Amir Hossein Javid * 2, Elham Moniri3 , Amir Hessam Hassani1 , Homayon Ahmad Panahi4
, Amir Hossein Javid * 2, Elham Moniri3 , Amir Hessam Hassani1 , Homayon Ahmad Panahi4
1- Department of Environment Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2- Department of Environment Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran ,a.javid@srbiau.ac.ir
3- Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Varamin, Iran
4- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
2- Department of Environment Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran ,
3- Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Varamin, Iran
4- Department of Chemistry, Central Tehran Branch, Islamic Azad University, Tehran, Iran
Abstract: (46 Views)
Background and Objective: Humic substances are a group of high molecular weight, heterogeneous organic macromolecules formed through biological and geochemical reactions. They are recognized as one of the main precursors of by-products in water treatment processes. Humic acid compounds create various issues in water and soil treatment industries, necessitating their effective removal from water sources. Due to their small size and their ability to separate environmental pollutants, magnetic nanoparticles are used in the treatment of toxic and hazardous pollutants and in remediating contaminated environments. This study aimed to investigate the removal efficiency of humic acid using a three-dimensional magnetic nanoadsorbent and to identify the optimal conditions for removal.
Materials and Methods: First, three-dimensional magnetic graphene oxide was synthesized, and then surface modification was carried out with allyl amine/allyl glycidyl ether. The characteristics of the synthesized magnetic nanoadsorbent were determined using field emission scanning electron microscopy and the surface charge zero point. The removal of humic acid from aqueous solutions on magnetic nanoadsorbent was assessed based on pH, nanoadsorbent dosage, contact time, and temperature, with optimal conditions identified using the Taguchi method. Additionally, the adsorption isotherms, kinetics, and thermodynamics of humic acid adsorption on the magnetic nanoabsorbent were determined, with data analyzed through linear regression and determination coefficients for isotherm comparisons. The reusability of the nanoadsorbent in the humic acid adsorption mechanism was also examined. Experimental studies was conducted on well water samples from Tehran and Manjilabad (Karaj).
Results: The analyses confirmed the structural characteristics and properties of the synthesized adsorbent. Optimal removal of humic acid was achieved at pH 6, an adsorbent dosage of 0.02 g, a contact time of 120 minutes, and a temperature of 25°C, resulting in a 98% removal efficiency. Results indicated that humic acid adsorption followed the Langmuir isotherm, with kinetics corresponding to a pseudo-second-order model, yielding correlation coefficients of 0.9969 and 0.9968, respectively. Thermodynamic data showed that humic acid adsorption by the nanoadsorbent is an endothermic and favorable process.
Conclusion: The use of this nanoadsorbent in removing humic acid from aqueous solutions can be considered as an efficient method. Magnetic nanoabsorbents offer the advantages of easy separation from suspensions using a magnetic field, potential recovery through various methods, and reusability.
Materials and Methods: First, three-dimensional magnetic graphene oxide was synthesized, and then surface modification was carried out with allyl amine/allyl glycidyl ether. The characteristics of the synthesized magnetic nanoadsorbent were determined using field emission scanning electron microscopy and the surface charge zero point. The removal of humic acid from aqueous solutions on magnetic nanoadsorbent was assessed based on pH, nanoadsorbent dosage, contact time, and temperature, with optimal conditions identified using the Taguchi method. Additionally, the adsorption isotherms, kinetics, and thermodynamics of humic acid adsorption on the magnetic nanoabsorbent were determined, with data analyzed through linear regression and determination coefficients for isotherm comparisons. The reusability of the nanoadsorbent in the humic acid adsorption mechanism was also examined. Experimental studies was conducted on well water samples from Tehran and Manjilabad (Karaj).
Results: The analyses confirmed the structural characteristics and properties of the synthesized adsorbent. Optimal removal of humic acid was achieved at pH 6, an adsorbent dosage of 0.02 g, a contact time of 120 minutes, and a temperature of 25°C, resulting in a 98% removal efficiency. Results indicated that humic acid adsorption followed the Langmuir isotherm, with kinetics corresponding to a pseudo-second-order model, yielding correlation coefficients of 0.9969 and 0.9968, respectively. Thermodynamic data showed that humic acid adsorption by the nanoadsorbent is an endothermic and favorable process.
Conclusion: The use of this nanoadsorbent in removing humic acid from aqueous solutions can be considered as an efficient method. Magnetic nanoabsorbents offer the advantages of easy separation from suspensions using a magnetic field, potential recovery through various methods, and reusability.
Type of Study: Research |
Subject:
تصفیه آب
Received: 2023/06/30 | Accepted: 2024/09/18 | Published: 2025/03/8
Received: 2023/06/30 | Accepted: 2024/09/18 | Published: 2025/03/8
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