Removal of As(V) from aqueous solution by using cement-porous hematite composite granules as adsorbent

Xu, Wangyang; Yang, Bingqiao; Jia, Feifei; Chen, Tianxing; Yang, Lu; Song, Shaoxian

doi:10.1016/j.rinp.2018.08.031

Cited by 10 publications

(2 citation statements)

References 41 publications

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“…In the latest years, by virtue of its appealing properties (ubiquity, high abundance, low-cost, environmental friendliness, nontoxicity, good chemical stability, small energy band gap), hematite (α-Fe 2 O 3 ) has gained a position of relevance in the scenery of materials suitable for sustainable applications. It is utilized in a wide variety of fields transversally involving biomedics, − environmental remediation, − magnetic data-storage and spintronics, − sensing, − and energy conversion and storage. − …”

Section: Introductionmentioning

confidence: 99%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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In the last years, hematite has been utilized in a plethora of applications. High aspect-ratio nanohematite and hematite/silica core–shell nanostructures are arousing growing interest for applications exploiting their magnetic properties. Atomic layer deposition (ALD) is utilized here to produce SiO2-coated α-Fe2O3 nanofibers (NFs) through two synthetic routes, viz. electrospinning/calcination/ALD or electrospinning/ALD/calcination. The number of ALD cycles (10–100) modulates the coating thickness, while the chosen route controls the final nanostructure. Porous and partially hollow NFs are produced. Their hierarchical structure and the nature and density of the lattice defects and strain are characterized by combining electron microscopy, diffraction, and spectroscopy techniques. The uncoated hematite NFs mostly have surface-related strain, which is attributed to oxygen vacancies/Fe2+ sites. ALD coating causes microstrain release and decrease of surface states. NFs calcined after ALD have extensive bulk strain, which is ascribed to the presence of dislocations throughout the volume of the NF grains. Bulk strain determines the remanent magnetization, whereas both surface and bulk strain influence the coercive field and the thermal behavior across the Morin temperature, including the magnetic memory effect. To the best of the authors’ knowledge, the correlation between lattice defects/strain and magnetic properties of SiO2-coated α-Fe2O3 NFs has never been reported before.

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Section: Introductionmentioning

confidence: 99%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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“…A specific physical characterization of the adsorbents would be necessary to clarify which minor components are responsible for the different behaviour. Regarding the portland cement, it has been reported as effective in removing metal traces from water (Hossain et al, 2020;Lim et al, 2019;Xu et al, 2018), but no indications have been reported for vegetable oils. The variation in the physical parameters is a consequence of a different chemical composition upon the different treatments.…”

Section: Resultsmentioning

confidence: 99%

Recycling of used vegetable oils by powder adsorption

et al. 2022

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The treatment of used vegetable oil (UVO) with seven different adsorbents and through two different procedures (stirring and gravity filtration) was explored. Important differences in terms of density, turbidity, electrical resistance, free fatty acids (FFAs) content and relative fatty acid distribution were observed. Different outcomes were shown depending both on the adsorbent and on the procedure. Lower values of density and FFAs were registered for oils treated by gravity filtration with portland (respectively 0.6% and 0.81 g/ml) and celite (respectively 0.7% and 0.72 g/ml). Considering the undesired leaching from the powder to the oil, related to the turbidity, the celite resulted more suitable for the oil recycling (241 Nephelometric Turbidity Unit (NTU) for portland vs 184 NTU for celite). In addition, Fourier-transform infrared spectroscopy combined with multivariate analysis allowed to determine a chemical fingerprint relative characteristic of vegetable oils recycled by gravity or by adsorption by stirring.

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Highly Efficient Removal of Cu(II) with Modified Electrolytic Manganese Residue as A Novel Adsorbent

Huang

Zhang

2022

Arab J Sci Eng

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Removal of As(V) from aqueous solution by using cement-porous hematite composite granules as adsorbent

Cited by 10 publications

References 41 publications

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Recycling of used vegetable oils by powder adsorption

Highly Efficient Removal of Cu(II) with Modified Electrolytic Manganese Residue as A Novel Adsorbent

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