Volume 7, Issue 1 (2023)                   IQBQ 2023, 7(1): 33-46 | Back to browse issues page

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Esmaeilpour M, Ghahraman Afshar M, Noroozi Tisseh Z, Ghahremanzadeh R. Removal of copper and chromium ions from aqueous solutions with magnetic nanoparticles functionalized with N-phosphonomethyl amino diacetic acid. IQBQ 2023; 7 (1) : 3
URL: http://arcpe.modares.ac.ir/article-38-65344-en.html
1- Assistant Professor, Chemical and Process Engineering Department, Niroo Research Institute (NRI), Tehran, Iran
2- Assistant Professor, Chemical and Process Engineering Department, Niroo Research Institute (NRI), Tehran, Iran , znoroozi@nri.ac.ir
3- Assistant Professor, Nanobiotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
Abstract:   (445 Views)
Contamination of water and soil with heavy metals poses serious risks and threats to human health and the environment, and therefore finding an effective solution to remove these metals is very necessary. In this research, magnetic nanoparticles MnFe2O4 @ SiO2 functionalized with N-phosphonomethyl aminodiacetic acid with core-shell structure were synthesized. These nanoparticles were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, (TGA) thermal gravimetric analysis, transmission electron microscope (TEM), and (VSM) vibration sample magnetometer. The performance of this synthetic nanoadsorbent for removing Cr (VI), Cu (II) ions from aqueous solutions was evaluated by various parameters such as adsorbent amount, contact time effect on adsorption rate and pH effect. The results show that the adsorption efficiency increases with raising pH (2.5-5) and the best adsorbent performance in the adsorption process of Cr ((VI) and Cu (II) ions at pH 7 was observed. The amount of R in the Freundlich adsorption diagram of copper ion is higher than the Langmuir isotherm. As a result, the adsorption of copper ions on the adsorbent follows the Freundlich adsorption equation. In addition, the amount of R in the Freundlich adsorption diagram for chromium ion is higher than the Langmuir isotherm. Therefore, the absorption of chromium ions on the adsorbent follows the Freundlich adsorption equation. In conclusion, a high n value indicates a favorable and effective absorption in the Freundlich equation. The adsorption data were analyzed by the Langmuir and Freundlich isotherm model. In addition, the recyclability and reuse of the adsorbent was investigated. The results show that no significant reduction in adsorbent activity is observed.
 
Article number: 3
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Article Type: Original Research | Subject: nano-composite
Received: 2022/11/9 | Accepted: 2023/08/22 | Published: 2023/12/20

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