Volume 14, Issue 3 (10-2018)
J Health Syst Res 2018, 14(3): 410-418 |
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Mohammadi-Galangash M, Bozorgpanah-Kharat Z, Mohammad Sanati A. Investigation of the Efficiency of Silica-Ester Magnetic Nanoparticles (Fe3O4@Sio2-MPAP) for the Removal of Anionic Dye from Aqueous Solutions: Kinetic, Isotherm, and Thermodynamic Studies. J Health Syst Res 2018; 14 (3) :410-418
URL: http://hsr.mui.ac.ir/article-1-1032-en.html
URL: http://hsr.mui.ac.ir/article-1-1032-en.html
1- Associate Professor, Department of Environmental Science and Engineering, School of Natural Resources, University of Guilan, Sowme'eh Sara, Iran
2- Department of Environmental Science and Engineering, School of Natural Resources, University of Guilan, Sowme'eh Sara, Iran
3- Assistant Professor, Department of Environmenal Science, Persian Gulf Research Institute, Persian Gulf University, Bushehr, Iran
2- Department of Environmental Science and Engineering, School of Natural Resources, University of Guilan, Sowme'eh Sara, Iran
3- Assistant Professor, Department of Environmenal Science, Persian Gulf Research Institute, Persian Gulf University, Bushehr, Iran
Abstract: (1463 Views)
Background: Removal of reactive azo dyes has been recognized as one of the major problems in textile wastewater treatment process. In recent years, the use of nanoparticles has been highly considered for the removal and reduction of contaminants in aquatic environments. In this survey, after synthesis of magnetic nanoparticles with a functional group of ester (Fe3O4@Sio2-MPAP silica-ester nanoparticles), their efficiency to remove the Reactive Black 5 (RB-5) dye from aqueous solutions was investigated.Methods: The synthesis of magnetic silica-ester nanoparticles was carried out with co-precipitation method in alkaline conditions. Transmission electron microscopy (TEM) analysis was used to identify the nanoparticle size. The effect of independent variables of pH, initial concentration of dye, and amount of nanoparticles on dye removal efficiency were evaluated. Kinetic, isotherm, and thermodynamic analysis were implemented to determine the mechanism and rate of absorption. Finally, the efficiency of recycled nanoparticles to remove the RB-5 dye was investigated.Findings: 100% of the dye was removed at pH of 2, dye concentration of 20 mg/l, and silica-ester nano-absorbent concentration of 0.3 g/l during 80 minutes. Kinetic studies of RB-5 removal in the optimal conditions demonstrated that the pseudo-second-order equation kinetic model corresponded to the adsorption process, and also represented the chemical absorption procedure. The absorption equilibrium data were in good agreement with the Langmuir isotherm model. Thermodynamic studies showed that the process of dye absorption was feasible, spontaneous, and endothermic. The synthesized nano-adsorbents had a five-fold suitable recycle efficiency.Conclusion: The silica-ester nanoparticles are effective in removing RB-5 dye from aqueous solutions, and these nanoparticles, due to proper recycling capability and chemical stretcher, can be noticed as an active absorbent for other anionic dyes.
Type of Study: Research |
Subject:
education health and promotion
Received: 2020/07/16 | Accepted: 2018/10/15 | Published: 2018/10/15
Received: 2020/07/16 | Accepted: 2018/10/15 | Published: 2018/10/15
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