Removal/separation of Co(II) ion from environmental sample solutions by MnFe2O4/bentonite nanocomposite as a magnetic nanomaterial

Abstract

a b s t r ac tMnFe 2 O 4 /bentonite nanocomposite was synthesized by chemical co-precipitation method. The prepared nanocomposite was characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and scanning electron microscopy (SEM) techniques. The XRD results indicated the montmorillonite associated with quartz phases in the structure of MnFe 2 O 4 /bentonite nanocomposite synthesized. VSM was carried out to characterize the magnetic properties of the nanocomposite prepared. SEM images of the nanoadsorbent showed that nanocomposite has a uniform structure in the range of 50-200 nm in diameter. Adsorption characteristic of the synthesized nanocomposite was examined to evaluate adsorption of the cobalt(II) ion from aqueous sample solutions and at pH range of 4.5-5.0 the maximum amount of cobalt(II) ion was adsorbed. The maximum adsorption capacity of cobalt(II) was determined to be 22.42 mg g −1 . The results showed that nanocomposite has catalytic activity higher than the bentonite itself. The results obtained from the adsorption kinetic studies showed that adsorption behavior of cobalt(II) ion onto nanoadsorbent conformed to Langmuir isotherm model and pseudo-second-order kinetic.

La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XI: Cobalto(II)/H⁺/Lewatit TP260

“…Table 3 showed the results obtained from these experiments, and it was concluded that the variation of the resin dosage produced an increment in the percentage of cobalt(II) loaded onto the resin, but at the same time the metal uptake decreased. These results were used to estimate the equilibrium isotherm, and the results from this fit indicated that the experimental results were best represented by the Langmuir model (r 2 = 0.9612) (Daraei and Mittal, 2017;Rahmani et al, 2017):…”

Enhancing Cu2+ Ion Removal: An Innovative Approach Utilizing Modified Frankincense Gum Combined with Multiwalled Carbon Tubes and Iron Oxide Nanoparticles as Adsorbent

“…Rahmani et al used co-precipitation to make a magnetic nanocomposite of MnFe 2 O 4 and bentonite that can adsorb Co(II) ions from wastewater. The nanocomposite proved to be very good at adsorbing Co(II) ions, which suggests that it could be an effective way to get heavy metals out of polluted water [21]. Chen et al developed Fe 3 O 4 /CNTs magnetic nanoparticles that effectively eliminated Cr(VI) from wastewater.…”

Boron Removal by Sorption on Modified Chitosan Hydrogel Beads

“…The efficient removal of arsenic from water using granular sorbent Fe–Mn binary oxide-impregnated chitosan beads was reported by Qi et al [ 23 ]. The separation of Co (II) ions from environmental sample solutions by a MnFe 2 O 4 /bentonite nanocomposite (a magnetic nanomaterial) was described by Rahmani et al [ 24 ]. Muliwa et al [ 25 ] reported manganese removal from water using chitosan/bentonite/MnO composite beads.…”