Ultrasound Assisted Adsorptive Removal of Cr, Cu, Al, Ba, Zn, Ni, Mn, Co and Ti from Seawater Using Fe2O3-SiO2-PAN Nanocomposite: Equilibrium Kinetics

Abstract

This work reports the preparation and application of Fe2O3-SiO2-PAN nanocomposite for the removal of Cr3+, Cu2+, Al3+, Ba2+, Zn2+, Ni2+, Mn2+, Co2+, and Ti3+ from seawater. X-ray diffraction (XRD), scanning electron microscope/energy dispersive X-ray spectroscopy (SEM/EDS), transmission electron microscope (TEM), and Brunauer-Emmett-Teller (BET) characterized the synthesized composite. The following experimental parameters (Extraction time, adsorbent mass and pH) affecting the removal of major and trace metals were optimized using response surface methodology (RSM). The applicability of the RSM model was verified by performing the confirmation experiment using the optimal condition and the removal efficiency ranged from 90% to 97%, implying that the model was valid. The adsorption kinetic data was described by the pseudo-second order model. The applicability of the materials was tested on real seawater samples (initial concentration ranging from 0.270–203 µg L−1) and the results showed satisfactory percentage efficiency removal that range from 98% to 99.9%. The maximum adsorption capacities were found to be 4.36, 7.20, 2.23, 6.60, 5.06, 2.60, 6.79, 6.65 and 3.00 mg g−1, for Cr3+, Cu2+, Al3+, Ba2+, Zn2+, Ni2+, Mn2+, Co2+, and Ti4+, respectively.

Activated carbon derived from waste orange and lemon peels for the adsorption of methyl orange and methylene blue dyes from wastewater

“…Which has the involvement of valence force by electron exchange between the dyes and adsorbent. In addition, the half-adsorption time (t 1/2 ) is the required time to remove 50 % of the analyte of interest in equilibrium ( Ramutshatsha-Makhwedzha et al., 2019 ). Moreover, the affinity between the adsorbent and the dye is high.…”

“…When ultrasonic irradiation is applied, the interaction between the solute and the adsorbent is promoted, and mass transfer on the surface of the material is promoted, thus improving the adsorption efficiency ( Çatlıoğlu et al., 2021 ; Mashile et al., 2021 ). In the literature, the effects of ultrasonic irradiation on the adsorption of various contaminants from aqueous solutions have been documented ( Geaneth Pertunia et al., 2020 ; Gugushe et al., 2021 ; Madimetja and Nomngongo, 2019 ; Mpupa et al., 2020 ; Ramutshatsha-Makhwedzha et al., 2019 ).…”

Kinetics and Thermodynamics Equilibrium of Nickel Metal Ions Sorption onto Carbon Nanofibers Irradiated by Ultrasonic Energy

“…Interaction between metal ions and an adsorbent in an aqueous solution is conventionally assisted by magnetic stirring. However, in recent years, ultrasound irradiation has extended more attention to numerous applications (Alimin et al, 2018;Alimin et al, 2022;Alimin et al, 2015;Ramutshatsha-Makhwedzha et al, 2019). It is believed that ultrasonic energy is powerful enough to assist not only metal ion uptake by an adsorbent but also metal ion reduction onto adsorbent such as CNFs (Alimin et al, 2018;Alimin et al, 2022;Alimin et al, 2015).…”

Polyacrylonitrile Fibers with a Gradient Silica Distribution as Precursors of Carbon-Silicon-Carbide Fibers

“…This approach makes it possible to impart hydrophobic properties to PAN-based materials while maintaining the inherent vapor-and air-permeability of PAN, which is required for textile, medical purposes, and the production of fabrics with special-purpose and self-cleaning materials [7][8][9]. In addition, modification of PAN with silicon-containing components is used in the production of membranes and filters to change their permeability and selectivity [10][11][12][13][14]. A surface modification of PAN fibers with silicon-containing coupling agents to improve compatibility with the matrix in the manufacture of the polymer composites was investigated in [15].…”