NDLI: Adsorption of As(V) Using Modified Magnetic Nanoparticles with Ascorbic Acid: Optimization by Response Surface Methodology

Content Provider	Springer Nature Link
Author	Nikraftar, Nasibeh Ghorbani, Farshid
Copyright Year	2016
Abstract	In the present study, response surface methodology (RSM) was applied to maximize As(V) removal from aqueous solutions by using modified magnetic nanoparticles with ascorbic acid (AA-MNPs). The structural features of the produced material were characterized by means of X-ray diffraction (XRD), N$_{2}$ adsorption–desorption, Fourier transform infrared (FT-IR), vibrating sample magnetometer (VSM), thermogravimetric analyses (TGA), and scanning electron microscopy (SEM). More specifically, the effects of pH, temperature, arsenic ion concentration, and sorbent dosage were investigated on the arsenic adsorption. A total of 20 sets of experiments were designed by the software to achieve maximum adsorption capacity (q $_{ e }$) and removal efficiency (R). Analysis of variance (ANOVA) of the two-factor interaction (2FI) model suggested that the predicted values were in good agreement with experimental data. The best local maximum values for pH, arsenic concentration, and sorbent dosage were found to be 2, 5 mg L$^{−1}$, and 0.1 g L$^{−1}$, respectively, that yielding maximum q $_{ e }$ of 44.99 mg g$^{−1}$ and a maximum R of 42.69 %. Additionally, the obtained value for desirability was equal to 0.862. The results indicated that the Langmuir model provided the best correlation of the equilibrium data. Moreover, the obtained results revealed that the pseudo-second-order kinetic model could best describe the adsorption kinetics.
Starting Page	1
Ending Page	18
Page Count	18
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	227
Issue Number	6
e-ISSN	15732932
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-05-14
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Adsorption Magnetic nanoparticles Ascorbic acid Response surface methodology Environment Water Quality/Water Pollution Atmospheric Protection/Air Quality Control/Air Pollution Soil Science & Conservation Hydrogeology Climate Change/Climate Change Impacts
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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