Superparamagnetic high-surface-area Fe3O4 nanoparticles as adsorbents for arsenic removal

Feng, Liyun; Cao, Minhua; Ma, Xiaoyu; Zhu, Yongshuang; Hu, Changwen

doi:10.1016/j.jhazmat.2012.03.073

Cited by 473 publications

(124 citation statements)

References 26 publications

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“…Nanosized metals or metal oxides, including Fe 3 O 4 [118], MnO 2 [62], TiO 2 [43], MgO [119], CdO [120] and ZnO [68], provide high surface area and specific affinity. Metal oxides possess minimal environmental impact, low solubility, and are not involved in secondary pollution formation; they have also been adopted as sorbents to remove heavy metals and dyes.…”

Section: Metal Oxide-based Nanomaterialsmentioning

confidence: 99%

“…Depending upon the surface functionality (COOH, NH 2 or SH), these magnetic nanoadsorbents capture metal ions either by forming chelate complexes, by ion exchange process or else through electrostatic interaction. It has been reported that these surface-engineered Fe 3 O 4 nanoparticles have a strong affinity for the simultaneous adsorption of [45,47,48,51,68,118,[123][124][125][126]. In addition, the adsorption process was found to be highly dependent on the amount, surface functionality and pH of the medium, which caused these nanoparticles to selectively adsorb metal ions [125][126][127].…”

Section: Metal Oxide-based Nanomaterialsmentioning

confidence: 99%

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The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

et al. 2017

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Nanomaterials have been extensively studied for heavy metal ions and dye removals from wastewater. This article reviews the role of nanomaterials as effective adsorbents for wastewater purification. In recent years, numerous novel nanomaterial adsorbents have been developed for enhancing the efficiency and adsorption capacities of removing contaminants from wastewater. The innovation, forthcoming development, and challenges of cost-effective and environmentally acceptable nanomaterials for water purification are discussed and reviewed in this article. This review concludes that nanomaterials have many unique morphological and structural properties that qualify them to be used as effective adsorbents to solve several environmental problems. Graphical Abstract& Hamidreza Sadegh

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Section: Metal Oxide-based Nanomaterialsmentioning

confidence: 99%

Section: Metal Oxide-based Nanomaterialsmentioning

confidence: 99%

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

et al. 2017

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“…Among them, magnetite (Fe3O4) provides a convenient approach for separating and removing contaminants, e.g., pentachlorophenol, arsenic, and mercury, from industrial effluent by applying external magnetic fields [15][16][17][18][19]. It has been known that bare magnetite nanoparticles exhibit strong adsorption capacity and have properties of being readily separated and collected by an external magnetic field [16,20]. However, they are susceptible to air oxidation and acid dissolution and are easily aggregated in aqueous systems that make them difficult to recycle [21].…”

Section: Introductionmentioning

confidence: 99%

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Setyawan

Widiyastuti

Mahmudi

et al. 2018

J. Pow. Tech. Adv. Funct. Mater.

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Abstract:In this paper, the synthesis of silica-coated magnetite nanoparticles using a one-step electrochemical method and their application for dye removal are presented. In this method, pure iron in a dilute aqueous sodium silicate solution that served as a silica precursor was electro-oxidized. The silica-coated magnetite nanoparticles produced by this method is nearly spherical with the size of approximately 10 nm and follows the spinel structure of Fe3O4. The silica-coated magnetite nanoparticles exhibit nearly superparamagnetic properties and excellent performance to remove methylene blue from wastewater. The adsorption capacity of the nanoparticles was approximately 24.2 mg methylene blue/g adsorbent, which was much higher than that of pure magnetite nanoparticles (1.1 mg methylene blue/g adsorbent). Also, the percentage removal was higher than 90% with the initial concentration of methylene blue up to 40 mg/L. It can be regenerated and reused with an only slight reduction in percentage removal.

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“…The effective removal of heavy metal ions from an aqueous solution using modified magnetic nanoparticles by polymer [18] for example polypyrrole [19] has been developed by the covalent binding of poly(acrylic acid) on the surface of Fe 3 O 4 nanoparticles followed by sulfonation using sulfanilic acid via carbodiimide activation [20] capped by EDA polymers [21]. Aminefunctionalized magnetite chitosan nanocomposites as a recyclable tool was used for the removal of heavy metals (amine-Fe 3 O 4 @SiO 2 ) [22], magnetic nanoparticles surface modification using acids such as humic acid (humic acid-Fe 3 O 4 ) [11] and ascorbic acid (ascorbic acid-Fe 3 O 4 ) [23]. Also to remove heavy metals by magnetic nanoparticles surface modification using some chemicals such as DMSA (DMSA-Fe 3 O 4 ) [24].…”

Section: +mentioning

confidence: 99%

Synthesis and characterization of nanocomposite NiFe2O4@SalenSi and its application in efficient removal of Ni(II) from aqueous solution

Babadi¹,

Tavakkoli²,

Afshari³

2018

Bull. Chem. Soc. Eth.

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ABSTRACT. In this work, nano ferrite spinel NiFe2O4 was synthesized by sol-gel method and characterized by SEM, XRD, FT-IR, and VSM. In second step Schiff base made from salicylaldehyde and amino propyl triethoxy silane was used for modification of the synthesized nano ferrit. In the third step removal of Ni(II) was done using modified adsorbent and 95% efficiency was achieved. The removal rate was determined by atomic absorption spectroscopy. These studies showed that the Freundlich isotherm model was fitted well with adsorption data. Moreover, the pseudo-second order kinetic model was fitted very well with experimental data. The results demonstrated that NiFe2O4@SalenSi nanoadsorbent can be used for the removal and recovery of metal ions from wastewater over a number of cycles, indicating its suitability for the design of a continuous process.

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Superparamagnetic high-surface-area Fe3O4 nanoparticles as adsorbents for arsenic removal

Cited by 473 publications

References 26 publications

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Synthesis and characterization of nanocomposite NiFe2O4@SalenSi and its application in efficient removal of Ni(II) from aqueous solution

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