Synthesis and characterization of nanocomposite NiFe2O4@SalenSi and its application in efficient removal of Ni(II) from aqueous solution

N. Babadi,H. Tavakkoli,M. Afshari

doi:10.4314/bcse.v32i1.7

N. Babadi, H. Tavakkoli + Show 1 more

Open Access

https://doi.org/10.4314/bcse.v32i1.7

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Abstract

In this work, nano ferrite spinel NiFe 2 O 4 was synthesized by sol-gel method and characterized by SEM, XRD, FT-IR, and VSM. In second step Schiff base made from salicylaldehyde and amino propyl triethoxy silane was used for modification of the synthesized nano ferrit. In the third step removal of Ni(II) was done using modified adsorbent and 95% efficiency was achieved. The removal rate was determined by atomic absorption spectroscopy. These studies showed that the Freundlich isotherm model was fitted well with adsorption data. Moreover, the pseudo-second order kinetic model was fitted very well with experimental data. The results demonstrated that NiFe 2 O 4 @SalenSi nanoadsorbent can be used for the removal and recovery of metal ions from wastewater over a number of cycles, indicating its suitability for the design of a continuous process. KEY WORDS : Nano ferrite, Sol-gel method, Schiff base, Removal of Ni(II), Magnetic nanocomposite Bull. Chem. Soc. Ethiop. 2018 , 32(1), 77-88 DOI: https://dx.doi.org/10.4314/bcse.v32i1.7

Highlights

The scarcity of water in terms of both quantity and quality has become a significant threat to the well-being of humanity
The waste products generated from the textiles, chemicals, mining and metallurgical industries are mainly responsible for contaminating the water [1]
The crystallite sizes were calculated using X-ray diffraction (XRD) peak broadening of the (311) peak using the Scherer’s formula: 0.9 Dhkl hkl cos hkl where Dhkl is the particle size perpendicular to the normal line of plane, βhkl is the full width at half maximum, θhkl is the Bragg angle of peak, and λ is the wavelength of X-ray

Summary

Introduction

The scarcity of water in terms of both quantity and quality has become a significant threat to the well-being of humanity. In the batch system the effects of pH, adsorbent dosage, initial concentration and contact time on the adsorption capacity were investigated.

Results

Conclusion