Superparamagnetic Fe3O4@EDTA nanoparticles as an efficient adsorbent for simultaneous removal of Ag(I), Hg(II), Mn(II), Zn(II), Pb(II) and Cd(II) from water and soil environmental samples

Ghasemi, Elham; Heydari, Akbar; Sillanpää, Mika

doi:10.1016/j.microc.2016.11.011

Cited by 125 publications

(29 citation statements)

References 38 publications

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“…Moreover, after coating with Fe 3 O 4 the appearance of a new peak at 630 cm -1 and the broadening of a band at 540 cm -1 can be attributed to vibration within the Fe 3 O 4 . These bands were attributed to Fe-O symmetric stretching vibrations in crystalline lattice (Silva et al 2013;Magnacca et al 2014;Ghasemi et al 2017;Karimzadeh et al 2017). Moreover, the positions of these bands are characteristic to magnetite and maghemite (Fu et al 2008;Wang et al 2010;Iyengar et al 2014).…”

Section: Xrd Resultsmentioning

confidence: 96%

Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Maziarz

Matusik

2017

Mineralogia

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In this study, halloysite-Fe3O4 composites were synthesized by a chemical-precipitation method to facilitate magnetic separation of the sorbents from aqueous solution. The research focused on the effect of Fe3O4 phase on the halloysite sorption properties. The X-ray diffraction (XRD) results confirmed successful deposition of Fe3O4 particles on a halloysite surface. They showed that the coating with Fe3O4 particles enhanced the halloysite adsorption affinity toward Cd(II) and Pb(II). The highest adsorption capacity was determined for the composites having 10% of the surface deposited with Fe3O4. In this case, the adsorption capacity for Cd(II) and Pb(II) was 33 and 112 mmol·kg -1 , respectively. The point of zero charge (pHPZC) and desorption results indicated that the removal mechanism of metals is mainly related to chemisorption involving reaction with hydroxyls of either halloysite or Fe3O4 phase. The ion exchange is of limited importance due to the low cation exchange capacity (CEC) of halloysite -Fe3O4 composites.

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Section: Xrd Resultsmentioning

confidence: 96%

Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Maziarz

Matusik

2017

Mineralogia

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“…The two characteristics weak bands observed in the region of 2840 cm −1 2950 and strong band at 3150 cm −1 are found in the IR spectra for Fe 3 O 4 @SiO 2 and Fe 3 O 4 @SiO 2 ‐EDTA (Figure . blue and brown lines) and correspond to the C−H bond . The broad strong band at 3433 cm −1 corresponds to the overlapping of −OH stretching bond.…”

Section: Resultsmentioning

confidence: 99%

“…Fe 3 O 4 @SiO 2 -EDTA nanoparticles were previously obtained and they possess many advantages in comparison to EDTA. These superparamagnetic iron oxide nanoparticles have been applied as an efficient adsorbent for: methylene blue and brilliant green dyes removal from aqueous media [48], separation of rare earths [49], Cu(II), Ca(II) [50][51][52], Cd(II), Pb(II) [53,54], Ag(I), Mn(II), and Zn(II) [55] removal from an aqueous solution, and Hg(II) removal from an aqueous solution and crude petroleum samples [56].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Cadmium Cd²⁺ and Lead Pb²⁺ Binding by Fe₂O₃@SiO₂‐EDTA Nanoparticles – Binding Stability and Kinetic Studies

et al. 2019

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This study describes the synthesis and characterization of ethylenediaminetetraacetic acid (EDTA) functionalized magnetic nanoparticles of 20 nm in size – Fe3O4@SiO2‐EDTA – which were used as a novel magnetic adsorbent for Cd(II) and Pb(II) binding in aqueous medium. These nanoparticles were obtained in two‐stage synthesis: covering by tetraethyl orthosilicate and functionalization with EDTA derivatives. Nanoparticles were characterized using TEM, FT‐IR, and XPS methods. Metal ions were detected under optimized experimental conditions using Differential Pulse Anodic Stripping Voltammetry (DPASV) and Hanging Mercury Drop Electrode (HDME) techniques. We compared the ability of Fe3O4@SiO2‐EDTA to bind cadmium and lead in concentration of 553.9 μg L−1 and 647.5 μg L−1, respectively. Obtained results show that the adsorption rate of cadmium binding was very high. The equilibrium for Fe3O4@SiO2‐EDTA‐Cd(II) was reached within 19 min while for the Fe3O4@SiO2‐EDTA‐Pb(II) was reached within 25 minutes. About 2 mg of nanoparticles was enough to bind 87.5 % Cd(II) and 54.1 % Pb(II) content. In the next step the binding capacity of Fe3O4@SiO2‐EDTA nanoparticles was determined. Only 1.265 mg of Fe3O4@SiO2‐EDTA was enough to bind 96.14 % cadmium ions while 5.080 mg of nanoparticles bound 40.83 % lead ions. This phenomenon proves that the studied nanoparticles bind Cd(II) much better than Pb(II). The cadmium ions binding capacity of Fe3O4@SiO2‐EDTA nanoparticles decreased during storage in 0.5 M KCl solution. Two days of Fe3O4@SiO2‐EDTA storage in KCl solution caused the 32 % increase in the amount of nanoparticles required to bind 60 % of cadmium while eight‐days storage caused further increase to 328 %. The performed experiment confirmed that the storage of nanoparticles in solution without any surfactants reduced their binding capacity. The best binding capacity was observed for the nanoparticles prepared directly before the electrochemical measurements.

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“…The heavy metal ions can attach to the outside active sites of the Fe 3 O 4 NPs. Some surface‐coated Fe 3 O 4 NPs have shown outstanding adsorption capacity for Cd 2+ (Ghasemi, Heydari, & Sillanpää, ). However, their anisotropic dipolar attraction generally creates large aggregates and causes decreased superparamagnetic characteristic; accordingly, they are commonly dispersed inside a nonmagnetic medium/matrix to avoid their agglomeration and to protect them against oxidation and corrosion (Peng et al, ).…”

Section: Introductionmentioning

confidence: 99%

Hybrid silica aerogel nanocomposite adsorbents designed for Cd(II) removal from aqueous solution

Shariatinia‬

Esmaeilzadeh

2019

Water Environment Research

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Hybrid silica aerogel (HSA) nanoparticles were synthesized by sol–gel method and drying at ambient pressure. Also, two magnetic nanocomposites of HSA with Fe3O4 nanoparticles and chitosan (CS) were prepared including HSA‐Fe3O4 and HSA‐Fe3O4‐CS. The morphology, structure, and magnetic properties of the HSA as well as its nanocomposites were analyzed by SEM, XRD, TGA, VSM, and ATR‐FTIR techniques. The saturation magnetization (Ms) values for the Fe3O4 NPs, HSA‐Fe3O4, and HSA‐Fe3O4‐CS nanocomposite film were 69.93, 19.04, and 5.77 emu/g, respectively. Furthermore, the abilities of the HSA, HSA‐Fe3O4, CS, and HSA‐Fe3O4‐CS adsorbents were assessed for removal of cadmium(II) heavy metal ions (100 ppm) from aqueous solution. All adsorbents removed/adsorbed the maximum Cd(II) ions in 120 min when adsorbent dosage = 20 mg and pH = 8. Moreover, the highest adsorption capacities were 58.5, 69.4, 65.8, and 71.9 mg/g for the HSA, CS, HSA‐Fe3O4, and HSA‐Fe3O4‐CS, respectively. Kinetic studies using all adsorbents verified that Cd(II) adsorption obeyed the second‐order model illustrating the analyte chemisorption was happened on the adsorbent surfaces. All adsorption data were well consistent with the Langmuir isotherms. The reusability experiment confirmed that all of adsorbents could preserve >95% of their initial adsorption capacities even after five series of adsorption/desorption tests. Practitioner points Hybrid silica aerogel (HSA), HSA‐Fe3O4, and HSA‐Fe3O4‐CS adsorbents were produced. Nanocomposites were characterized by XRD, TGA, SEM, VSM, and ATR‐FTIR analysis. Adsorption of cadmium(II) ions by adsorbents was examined in aqueous solution. The highest adsorption capacity was obtained for the HSA‐Fe3O4‐CS (71.9 mg/g). Cd(II) adsorption followed second‐order kinetics and Langmuir isotherm model.

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Superparamagnetic Fe3O4@EDTA nanoparticles as an efficient adsorbent for simultaneous removal of Ag(I), Hg(II), Mn(II), Zn(II), Pb(II) and Cd(II) from water and soil environmental samples

Cited by 125 publications

References 38 publications

Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Comparison of Cadmium Cd²⁺ and Lead Pb²⁺ Binding by Fe₂O₃@SiO₂‐EDTA Nanoparticles – Binding Stability and Kinetic Studies

Hybrid silica aerogel nanocomposite adsorbents designed for Cd(II) removal from aqueous solution

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Superparamagnetic Fe3O4@EDTA nanoparticles as an efficient adsorbent for simultaneous removal of Ag(I), Hg(II), Mn(II), Zn(II), Pb(II) and Cd(II) from water and soil environmental samples

Cited by 125 publications

References 38 publications

Halloysite Composites with Fe3O4Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Halloysite Composites with Fe3O4Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Comparison of Cadmium Cd2+ and Lead Pb2+ Binding by Fe2O3@SiO2‐EDTA Nanoparticles – Binding Stability and Kinetic Studies

Hybrid silica aerogel nanocomposite adsorbents designed for Cd(II) removal from aqueous solution

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Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Halloysite Composites with Fe₃O₄Particles: The Effect of Impregnation on the Removal of Aqueous Cd(II) And Pb(II)

Comparison of Cadmium Cd²⁺ and Lead Pb²⁺ Binding by Fe₂O₃@SiO₂‐EDTA Nanoparticles – Binding Stability and Kinetic Studies