Removal of Pb(II) from aqueous solutions using Acacia Nilotica seed shell ash supported Ni0.5Zn0.5Fe2O4 magnetic nanoparticles

Abstract

Acacia Nilotica seed shell ash supported Ni 0.5 Zn 0.5 Fe 2 O 4 magnetic nanoparticles were synthesized by a low-cost, simple, and environmentally benign procedure. The adsorbent was characterized by several methods including X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. Then, the potential of Acacia Nilotica seed shell ash supported Ni 0.5 Zn 0.5 Fe 2 O 4 magnetic nanoparticles was investigated for adsorption of Pb(II). The effect of different parameters including contact time, pH, adsorbent dosage and initial Pb(II) concentration on the Pb(II) removal yield was studied. The experimental data were fitted well with the pseudo-second order kinetic model (R 2 ¼ 0.999). The adsorption isotherm was described well by the Langmuir isotherm (R 2 ¼ 0.900) with a maximum monolayer adsorption capacity of 37.6 mg g -1 . The process for purifying water treatment presented here is easy using the magnetic nanoparticles. Therefore, this adsorbent was found to be useful and valuable for controlling water pollution due to Pb(II) ions.

Adsorptive removal of cadmium from aqueous solutions using NiFe2O4/hydroxyapatite/graphene quantum dots as a novel nano-adsorbent

“…The amount of Cd 2+ adsorbed increased with increasing the pH value of solution from 3 to 6.0 (approximately); this aspect can be interpreted by precipitation of Cd 2+ as insoluble Cd(OH) 2 precipitate. In other words, in these pH values (˃ 6), the Cd(II) ions begin to hydrolyze and then form a small quantity of cadmium hydroxyl species [33]. In other words, at lower pH (less than 3), the low metal adsorption can be assigned to the protonated surfaces of NiFe 2 O 4 /HAP/GQDs, electron repulsion, and competition between Cd 2+ and H + ions.…”

NiFe2O4 coated sand as a nano-adsorbent for removal of Pb (II) from aqueous solutions

“…One of the most important factors in the adsorption process (especially absorption capacity) is the acidity of aqueous solution [32]. In order to assess the effect of pH on the uptake capacity of adsorbents, the experiments were performed with the pH range of 2 -9 ( Figure 4).…”

Green and efficient Beckmann rearrangement by Cu(II) contained nano‐silica triazine based dendrimer in water

“…Accordingly, to overcome these limitations, the use of high stability and catalytic efficiency, low cost and toxicity, easy synthesis, and fast versatile surface functionalization has expanded in recent years. In the wake of our efforts in nano‐catalysts synthesis, [ 22 ] in the present report, the manufacturing of Cu(II)@ nano‐silica functionalized triazine dendrimer (Cu(II)‐TrDen@nSiO 2 ) as an efficient catalytic system is discussed. Upon full identification of catalyst structure, the catalyst has been applied for the synthesis of various primary amides through Beckmann rearrangement.…”