Synthesis and Characterization of Magnetites Obtained from Mechanically and Sonochemically Assissted Co-precipitation and Reverse Co-precipitation Methods

Sulistyaningsih, Triastuti; Santosa, Sri Juari; Siswanta, Dwi; Rusdiarso, Bambang

doi:10.18178/ijmmm.2017.5.1.280

Cited by 17 publications

(14 citation statements)

References 18 publications

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“…Depending on the oxidation state of the initial reagent, we can expect different hydroxides from each synthesis, according to the following reactions [ 21 ]: Fe(II): FeCl 2 + 2R-OH → Fe(OH) 2 + 2R-Cl Fe(III): FeCl 3 + 3R-OH → Fe(OH) 3 + 3R-Cl Fe(III) + Fe(II): 2FeCl 3 + FeCl 2 + 8R-OH → 2Fe(OH) 3 + Fe(OH) 2 + 8R-Cl …”

Section: Methodsmentioning

confidence: 99%

New Sustainable, Scalable and One-Step Synthesis of Iron Oxide Nanoparticles by Ion Exchange Process

et al. 2021

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This work introduces an innovative, sustainable, and scalable synthesis of iron oxides nanoparticles (NPs) in aqueous suspension. The method, based on ion exchange process, consists of a one-step procedure, time and energy saving, operating in water and at room temperature, by cheap and renewable reagents. The influence of both oxidation state of the initial reagent and reaction atmosphere is considered. Three kinds of iron nanostructured compounds are obtained (2-lines ferrihydrite; layered-structure iron oxyhydroxide δ-FeOOH; and cubic magnetite), in turn used as precursors to obtain hematite and maghemite NPs. All the produced NPs are characterized by a high purity, small particles dimensions (from 2 to 50 nm), and high specific surface area values up to 420 m2/g, with yields of production >90%. In particular, among the most common iron oxide NPs, we obtained cubic magnetite NPs at room temperature, characterized by particle dimensions of about 6 nm and a surface area of 170 m2/g. We also obtained hematite NPs at very low temperature conditions (that is 2 h at 200 °C), characterized by particles dimensions of about 5 nm with a surface area value of 200 m2/g. The obtained results underline the strength of the synthetic method to provide a new, sustainable, tunable, and scalable high-quality production.

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Section: Methodsmentioning

confidence: 99%

New Sustainable, Scalable and One-Step Synthesis of Iron Oxide Nanoparticles by Ion Exchange Process

et al. 2021

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“…Magnetite NPs were synthesized using reverse co-precipitation method under N 2 stream during the whole preparation steps (Sulistyaningsih et al 2017). In details, 5.2 g of FeCl 3 •6H 2 O and 2.674 g of FeSO 4 •7H 2 O were dissolved in 50 ml deionized water and stirred for 15 min under inert atmosphere at room temperature.…”

Section: Synthesis Of Magnetite Npsmentioning

confidence: 99%

Integration between bacterial consortium and magnetite (Fe3O4) nanoparticles for the treatment of oily industrial wastewater

El-Bestawy

El-Shatby

Eltaweil

2020

World J Microbiol Biotechnol

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The study aimed to investigate the efficiency of exogenous bacterial consortium (Enterobacter cloacae and Pseudomonas otitidis) decorated (immobilized) with Fe 3 O 4 Nanoparticles for the treatment of petroleum hydrocarbon-contaminated wastewater. Glycine coated magnetite Nanoparticles (Fe 3 O 4 NPs) were prepared using reverse co-precipitation method and were characterized using X-ray diffraction, transmission and scanning electron microscopy and vibrating sample magnetometer. They were used to decorate exogenous bacterial consortium (Enterobacter cloacae and Pseudomonas otitidis) at 3 different Fe 3 O 4 /bacteria ratios (1:1, 1:3 and 3:1 w/w). Bioremediation of oil contaminated wastewater collected from one of the petroleum distribution companies, Alexandria was conducted for 168 h using Fe 3 O 4 /bacterial association at the best ratio (3:1) and compared with non-decorated consortium and the indigenous bacteria in the control. Analysis indicated crystalline structure of Fe 3 O 4 NPs with spherical particles (size: 15-20 nm) and superparamagnetic properties. Glycine modified-Fe 3 O 4 exhibited high ability to immobilize bacteria which acquired its magnetic properties. The highest coating efficiency (92%) was achieved at 3:1 Fe 3 O 4 /bacteria ratio after 1 h. This ratio positively affected bacterial growth reaching the highest growth rate (5.07 fold higher than the control) after 4 h. The highest removal efficiencies of the total suspended solids (TSS), chemical oxygen demands (COD), oil and grease (O&G) and total petroleum hydrocarbons (TPH) recording 96, 65.4, 83.9 and 85% reaching residual concentrations of 9.5, 598, 99 and 60 mg/l respectively were achieved after 4 h by the Fe 3 O 4-bacteria assembly. Compared with the maximum permissible limits of the tested parameters, TSS residue was highly compiled with its limit (50 mg/l), while COD, O&G and TPH were 7.5, 9.9, and 120-folds higher than their limits (100, 15 and 0.5 mg/l respectively). To the best of our knowledge it is first time to use integrated Enterobacter cloacae and Pseudomonas otitidis consortium decorated with Fe 3 O 4 NPs for the treatment of petroleum hydrocarbon-contaminated wastewater. The proposed system proved to be a very efficient, economical and applicable for the removal of the included contaminants in very short running time which increases its biotechnological added value.

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Section: Resultsmentioning

confidence: 99%

“…The pattern for MG shows peaks at 30.3°, 35.6°, 43.4°, 57.1°, 62.9°, and 75.5°, corresponding to the (220), (311), (400), (511), (440), and (622) indices, specific for MG nanoparticles (Sulistyaningsih et al, 2017). The peak at 31.8° indicates the presence of other ferrous oxides, such as hematite (Sulistyaningsih et al, 2017). The patterns for the 2GO:1MG, 1GO:1MG, and 1GO:2MG composites show peaks corresponding to the (220), (311), (400), (422), (511), and (440) indices, similar to those described by previous authors (Y. Li et al, 2014; M. Liu et al, 2011; Tayyebi et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Zinc removal from synthetic waters using magnetite/graphene oxide composites

Almeida‐Naranjo

Morillo

Aldás

et al. 2023

Remediation Journal

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The removal of heavy metals from wastewater has become a global challenge, which demands the continuous study of efficient and low‐cost treatment alternatives such as adsorption. In this research, the removal of zinc was evaluated using batch adsorption processes with nonconventional materials such as graphene oxide (GO), magnetite (MG), and their composites (GO:MG), formulated with three weight ratios (2:1, 1:1, and 1:2). Graphene was synthesized by the modified Marcano method, using pencil lead graphite as a precursor. MG and the composites were synthesized by chemical coprecipitation of ferrous sulfate and ferric chloride. The materials were characterized by Raman and Fourier transform infrared spectroscopies, scanning electron microscopy, X‐ray diffraction, and the Brunauer–Emmett–Teller method to determine the functional groups, microstructural and morphological characteristics, and specific surface area. Batch adsorption tests were carried out to optimize the adsorbent dose and contact time with zinc solutions of 10 ppm. Zinc adsorption reached equilibrium at 2 h, with an optimal dose between 0.25 and 1.0 g/L. The maximum zinc removal efficiencies/adsorption capacities were 98.6%/165.6, 83.4%/47.6, 83.5%/21.9, 72.8%/19.9, and 82.2%/9.25 mg/g using GO, 2GO:1MG, 1GO:1MG, 1GO:2MG, and MG, respectively. Furthermore, the analysis of the isotherm and adsorption kinetics models determined that the adsorption processes using MG and the composites fit the Sips and pseudo‐second‐order models.

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Synthesis and Characterization of Magnetites Obtained from Mechanically and Sonochemically Assissted Co-precipitation and Reverse Co-precipitation Methods

Cited by 17 publications

References 18 publications

New Sustainable, Scalable and One-Step Synthesis of Iron Oxide Nanoparticles by Ion Exchange Process

New Sustainable, Scalable and One-Step Synthesis of Iron Oxide Nanoparticles by Ion Exchange Process

Integration between bacterial consortium and magnetite (Fe3O4) nanoparticles for the treatment of oily industrial wastewater

Zinc removal from synthetic waters using magnetite/graphene oxide composites

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