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Evaluation of Adsorption and Removal of Methylparaben From Aqueous Solutions Using Amino-Functionalized Magnetic Nanoparticles As an Efficient Adsorbent: Optimization and Modeling by Response Surface Methodology (Rsm) Publisher



Mohammadi F1, 2 ; Esrafili A2 ; Sobhi HR3 ; Behbahani M4 ; Kermani M2 ; Asgari E2, 5 ; Fasih ZR6
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Student Research Committee, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Chemistry, Payame Noor University, Tehran, Iran
  4. 4. Faculty of Engineering, Shohadaye Hoveizeh University of Technology, Susangerd, Dasht-e Azadegan, Iran
  5. 5. Department of Environmental Health Engineering, School of Public Health, Urmia University of Medical Sciences, Urmia, Iran
  6. 6. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

Source: Desalination and Water Treatment Published:2018


Abstract

Here in, an efficient amino-modified magnetic nano-adsorbent (Fe3O4@SiO2-NH2) was applied for the removal of methylparaben (MeP) from aqueous solutions and the removal process was fully optimized by a response surface methodology (RSM). Amino-functionalized magnetic nanoparticles (MNPs) were characterized by FTIR, XRD, SEM and VSM analysis. The Box–Behnken design (BBD) was successfully employed to optimize and determine the influential parameters such as pH (3–11), adsorbent dosage (0.1–1.1 g L–1), reaction time (10–120 min) and solution temperature (25–45°C). The optimal conditions obtained for the adsorption of methylparaben were as follows: temperature, 35°C; pH ≈ 7.0; adsorbent dosage, 1.1 g L–1; and reaction time, 120 min. Under the optimized conditions, the adsorption capacity of 98% was achieved for methylparaben. Additionally, the maximum amount of MeP adsorbed on the nano-adsorbent was determined to be about 75 mg/g. The adsorption isotherms and kinetics were well suited to the Langmuir and pseudo-second-order model, respectively. Finally, it was found out that amino-functionalized magnetic nano-adsorbent is of great potential to remove methylparaben from various aqueous media. © 2018 Desalination Publications. All rights reserved.
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