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. 2022 Jun 5;8(6):e09645.
doi: 10.1016/j.heliyon.2022.e09645. eCollection 2022 Jun.

APTMS-BCAD modified magnetic iron oxide for magnetic solid-phase extraction of Cu(II) from aqueous solutions

Ali Bilgiç  1 , Hacer Sibel Karapınar  2
Affiliations

APTMS-BCAD modified magnetic iron oxide for magnetic solid-phase extraction of Cu(II) from aqueous solutions

Ali Bilgiç et al. Heliyon. .

Abstract

Fe3O4@SiO2-3-aminopropyltrimethoxysilane-1,8-bis (3-chloropropoxy) anthracene-9,10-dione was synthesized as a new, sustainable, and environmentally friendly adsorbent for magnetic solid-phase extraction of Cu(II) from aqueous solutions. The structure of the adsorbent was characterized by FTIR, XRD, SEM, EDX, and TEM analysis. Optimum conditions for Cu(II) adsorption were determined as adsorbent dose 0.04 g, pH 5.0, contact time 120 min, and beginning concentration of 30 mg/L in the adsorption process. The adsorption capacity for Cu(II) ions was 43.67 mg/g and the removal efficiency was 84.72 percent. The Langmuir isotherm and the pseudo-second-order model fit the experimental data better. Adsorption was a spontaneous and endothermic process based on the obtained thermodynamic properties such as ΔG°, ΔH°, and ΔS°. The results showed that the sorbent has good selectivity in the presence of competing ions. The method was determined to be accurate and effective using real water samples and CRM.

Keywords: Adsorption; Cu(II); Isotherm; Kinetic; Magnetic.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Image 1
Graphical abstract
Figure 1
Figure 1
Schematic illustration of Fe3O4, Fe3O4@SiO2, Fe3O4@SiO2-APTMS nanoparticle, and the magnetic FSAB nanoparticle adsorbent.
Figure 2
Figure 2
FT-IR spectra of (a) Fe3O4, (b) Fe3O4@SiO2, (c) Fe3O4@SiO2-APTMS nanoparticles, (d) FSAB nanoparticle adsorbent and (e) BCAD compound.
Figure 3
Figure 3
TEM images of (a) Fe3O4, (b) Fe3O4@SiO2, (c) Fe3O4@SiO2-APTMS and (d) FSAB nanoparticle adsorbent.
Figure 4
Figure 4
XRD patterns of (a) Fe3O4, (b) Fe3O4@SiO2, (c) Fe3O4@SiO2-APTMS and (d) FSAB nanoparticle adsorbent.
Figure 5
Figure 5
(a) Fe3O4, (b) Fe3O4@SiO2, (c) Fe3O4@SiO2-APTMS, and (d) FSAB nanoparticle adsorbent SEM images and EDX data.
Figure 6
Figure 6
Effects of adsorbent dose on Cu(II) adsorption by the FSAB nanoparticle adsorbent.
Figure 7
Figure 7
Effect of pH on Cu(II) adsorption by the FSAB nanoparticle adsorbent.
Figure 8
Figure 8
Effect of contact time on Cu(II) adsorption by the FSAB nanoparticle adsorbent.
Figure 9
Figure 9
The influence of initial Cu(II) concentration on copper adsorption by the FSAB nanoparticle adsorbent.
Figure 10
Figure 10
Plots of Cu(II) adsorption by the FSAB nanoparticle adsorbent using (a) pseudo-first-order (PFO) and (b) pseudo-second-order (PSO) kinetic models.
Figure 11
Figure 11
(a) Impact of temperature on Cu(II) adsorption by the FSAB,(b) The Van't Hoff plot for Cu(II) adsorption by the FSAB nanoparticle adsorbent.
Figure 12
Figure 12
The probable reaction mechanism underlying the adsorption process.
Figure 13
Figure 13
The FSAB nanoparticle adsorbent's adsorption efficiency and capacity for Cu(II) after four successive adsorption–regeneration cycles.
See this image and copyright information in PMC

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