Preparation of magnetic Fe3O4 nanocomposites modified with MnO2, Al2O3, Au and their application for preconcentration of arsenic in river water samples

Munonde, Tshimangadzo S.; Maxakato, Nobanathi Wendy; Nomngongo, Philiswa N.

doi:10.1016/j.jece.2018.02.017

Cited by 26 publications

(6 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD patterns for MP-POP ( Figure 4B) showed crystalline structure confirming the incorporation of magnetic particles on the surface of P-POP. The prominent diffraction peaks around 30.5 • (311), 36.3 • (400, 43.4 • (422), 56.9 • (511), and 62.8 • (440) corresponded to the crystalline structure of Fe 3 O 4 (JCPDS file 19-0629) (Deng et al, 2009(Deng et al, , 2019Wang et al, 2017Wang et al, , 2018aMunonde et al, 2018) These observations were in agreement with EDS and TEM results and other reports in the literature (Wang et al, 2017(Wang et al, , 2018a.…”

Section: Characterization Of the Nanocompositesupporting

confidence: 90%

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this study, a magnetic porphyrin-based porous organic polymer (MP-POP) nanocomposite was successfully synthesized according previous studies and applied as an adsorbent for simultaneous extraction and preconcentration of four neonicotinoid insecticides from surface river water. The MP-POP was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy/energy dispersive x-ray spectroscopy (SEM/EDS), N 2-adsorption/desorption analysis, Fourier Transform infrared spectroscopy (FTIR). The neonicotinoid insecticides were quantified using high performance chromatography coupled with diode array detector (HPLC-DAD). The MP-POP shown to have a high surface area, highly porous structure and strong affinity toward the investigated analytes. The adsorption capacities were 99.0, 85.5, 90.0, and 79.4 mg g −1 for acetamiprid, clothiandin, thiacloprid and imidacloprid, respectively. The influential parameters affecting the magmatic µ-solid phase extraction (M-µ-SPE) procedure were investigated using fractional factorial design and surface response methodology (RSM). Under optimum conditions, the method exhibited relatively low limit of detection in the range of 1.3-3.2 ng L −1 , limit of quantification in the range of 4.3-11 ng L −1 and wide linearity (up to 600 µg L −1). The intraday and interday precision, expressed as the relative standard deviation (RSD) were <5%. The percentage recoveries for the four target analytes ranged from 91 to 99.3% for the spiked river water samples. The method was applied for determination of neonicotinoids in river water samples and concentrations ranged from 0 to 190 ng L −1 .

show abstract

Section: Characterization Of the Nanocompositesupporting

confidence: 90%

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Additionally, naked Fe 3 O 4 is known to be prone to oxidation and is highly susceptible to leaching under acidic conditions. To stabilize and modify magnetic Fe 3 O 4 particles and further improve their adsorption properties, composite materials have been fabricated in core-shell structures with polymers, silicacontaining organic materials or other materials as a shell, such as Fe 3 O 4 @MO x (M ¼ Si, Mn, Ti, and Al) [16][17][18] and Fe 3 O 4 @polymer. 19 One of the most important methods is the introduction of a dense SiO 2 layer on the surface of magnetite Fe 3 O 4 particles, which is very stable in acidic conditions and is inert to redox reactions; thus, it can effectively protect the inner magnetite cores from leaching in an acidic medium in practical applications.…”

Section: Introductionmentioning

confidence: 99%

Novel magnetically separable anhydride-functionalized Fe₃O₄@SiO₂@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The TEM images of Fe3O4, Fe3O4@SiO2 and Fe3O4@SiO2@Mg-Al-LDH are shown in Figure 2A-C. It is observed in Figure 2A that the displayed darker black isometric structures were ascribed to Fe3O4 nanoparticles [39]. Figure 2B displayed distinctive regular core-shell structures with a certain amount of black particles inside the transparent shells.…”

Section: Structural and Morphological Properties Of The Compositementioning

confidence: 97%

Recovery of Palladium and Gold from PGM Ore and Concentrate Leachates Using Fe3O4@SiO2@Mg-Al-LDH Nanocomposite

et al. 2021

View full text Add to dashboard Cite

In this work, we developed a core–shell nanostructured magnetic composite by functionalizing layered double hydroxide (Mg-Al-LDH) microspheres with Fe3O4@SiO2, for the recovery of Au(III) and Pd(II). The magnetic Fe3O4 nanoparticles provided effective magnetic separation of the adsorbent from aqueous solutions. While silica protected the Fe3O4 nanoparticles, increased the adsorption sites and the stability of the material. Finally, Mg-Al-LDH was chosen because of its large anion sorption capacities which lead to the improved adsorption capacity of Fe3O4@SiO2@ Mg-Al-LDH nanocomposite. The morphology and structural composition of the nanocomposite were characterized using various analytical techniques. It was satisfactorily established that silica was coated on iron oxide and layered double hydroxide was immobilized on Fe3O4@SiO2. Parameters affecting adsorption of the composite towards Au(III) and Pd(II), such as effects of sample pH, mass of adsorbent, extraction time, eluent type and concentration were investigated using response methodology based on central composite design. Maximum adsorption capacities of Fe3O4@SiO2@ Mg-Al-LDH for Au(III) and Pd(II) were 289 mg g−1 and 313 mg g−1, respectively. Under optimum conditions, the proposed method displayed good analytical performance suggesting that the adsorbent is a good candidate for quantitative extraction of Au(III) and Pd(II) from secondary sources. Additionally, %recoveries ranging from 85%–99.6% were obtained revealing that Fe3O4@SiO2@ Mg-Al-LDH could selectively extract Au(III) and Pd(II) from leaching solutions of SARM 107 PGM ore and SARM 186 PGM concentrate.

show abstract

Preparation of magnetic Fe3O4 nanocomposites modified with MnO2, Al2O3, Au and their application for preconcentration of arsenic in river water samples

Cited by 26 publications

References 53 publications

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Novel magnetically separable anhydride-functionalized Fe₃O₄@SiO₂@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions

Recovery of Palladium and Gold from PGM Ore and Concentrate Leachates Using Fe3O4@SiO2@Mg-Al-LDH Nanocomposite

Contact Info

Product

Resources

About

Preparation of magnetic Fe3O4 nanocomposites modified with MnO2, Al2O3, Au and their application for preconcentration of arsenic in river water samples

Cited by 26 publications

References 53 publications

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Magnetic Solid Phase Extraction Based on Nanostructured Magnetic Porous Porphyrin Organic Polymer for Simultaneous Extraction and Preconcentration of Neonicotinoid Insecticides From Surface Water

Novel magnetically separable anhydride-functionalized Fe3O4@SiO2@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions

Recovery of Palladium and Gold from PGM Ore and Concentrate Leachates Using Fe3O4@SiO2@Mg-Al-LDH Nanocomposite

Contact Info

Product

Resources

About

Novel magnetically separable anhydride-functionalized Fe₃O₄@SiO₂@PEI-NTDA nanoparticles as effective adsorbents: synthesis, stability and recyclable adsorption performance for heavy metal ions