Modeling and Experimental Evaluation of Ni(II) and Pb(II) Sorption from Aqueous Solutions Using a Polyaniline/CoFeC₆N₆ Nanocomposite

Abstract

Herein, a modified polyaniline nanocomposite containing CoFeC6N6 was prepared and tested for its sorption of Pb2+ and Ni2+ ions from aqueous solutions. The adsorbent was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Brunauer–Emmett–Teller and Fourier transform infrared analyses. The adsorption percentage increased with increasing CoFeC6N6 in the nanocomposite material. A pseudo-second-order model and Langmuir adsorption described the behavior of the material. Additionally, the adsorption capacity was increased by increasing the temperature. The prediction of concentrations was performed using a model based on pore diffusion and the implicit finite difference method. From a mass transfer standpoint, the best data set of D e for Pb2+ (1.12 × 10–9 m2 s–1) and Ni2+ (0.98 × 10–13 m2 s–1) was determined.

Facile Synthesis of Phytic Acid Impregnated Polyaniline for Enhanced U(VI) Adsorption

“…To confirm the functionalization of PA on PANI, the FT-IR spectra analysis were applied. As shown in Figure , the main characteristic peaks of PANI are 1627 (stretching vibration of the quinonoid rings), 1465 (CC deformations stretching of benzenoid rings), 1300 (C–N stretching of the benzenoid ring), 1103 (bending vibration mode of the quinonoid rings), and 798 cm –1 (the out-of-plane deformation of C–H in the para-disubstituted benzene ring). ,,, …”

“…Considering those adsorbents, polymer materials have shown high adsorption capacity and selectivity for target ions due to their easy chemical functionalization by introducing a large number of functional groups, for example, graphene oxide/polypyrrole composites . Polyaniline (PANI) is a polymer, which acts as host materials, and with its special backbone structure can be chemically functionalized with various functional groups for capturing target ions in aqueous solution . Additionally, the presence of a large number of amine and imine functional groups makes it possess strong affinity for radionuclides, such as Cs­(I) (18.6 mg/g, pH = 3.0), Sr­(II) (16.4 mg/g, pH = 3.0), Eu­(III) (38.0 mg/g, pH = 3.0), and U­(VI) (31.4 mg/g, pH = 3.0) …”

“…15 Polyaniline (PANI) is a polymer, which acts as host materials, and with its special backbone structure can be chemically functionalized with various functional groups for capturing target ions in aqueous solution. 16 Additionally, the presence of a large number of amine and imine functional groups makes it possess strong affinity for radionuclides, such as Cs(I) (18.6 mg/g, pH = 3.0), Sr(II) (16.4 mg/g, pH = 3.0), Eu(III) (38.0 mg/g, pH = 3.0), and U(VI) (31.4 mg/g, pH = 3.0). 9 Phytic acid (PA, C 6 H 18 O 24 P 6 ), a nontoxic macromolecular organic compound, comes from distilling grain.…”

Assessing the Adsorptive and Photodegradative Efficiencies of ZSM-11 Synthesized from Rice Husk Ash

“…Synthetic zeolites obtained from industrial, municipal, or agricultural waste materials especially rice husk ash (RHA) and coal fly ash (CFA) have huge potential as a cost-effective environmentally friendly solution that can improve the efficiency of wastewater treatment [28]. Polyaniline/CoFeC 6 N 6 nanocomposite has been used for the sorption of Ni (II) and Pb (II) as investigated by Moazeai et al, 2018 [29]. Cu (II), Cd (II), and Pb (II) present in industrial effluents have been removed using Moringa stenopetala seed husk by Temesgen et al, 2018 [30].…”

Simultaneous adsorption of Li(I) and Rb(I) by dual crown ethers modified magnetic ion imprinting polymers

“…[21][22][23][24][25] The high commercial values of Li as well as Rb result in explosive demand of them. [25][26][27] However, the extraction of Li(I) and Rb(I) is faced with so many problems because of their unique physical and chemical properties. [28,29] Therefore, the efficient extraction of Li(I) and Rb(I) is of urgent task from an environmental perspective and a commercial perspective.…”