Magnetic Behavior of Natural Fe₂O₃ from Lhoong Iron Ore Mining Area, Aceh Province, Indonesia

Abstract

The mineral composition and magnetic behavior of nano-Fe 2 O 3 of iron ore from Lhoong mining area, Aceh province, were studied. The iron ore was prepared by mechanical milling method. The mineral and chemical compositions of samples were investigated by XRD and XRF analysis tests. The XRF test showed that the Lhoong iron ore contains Fe 2 O 3 (93.88%) in association with other isomorphous impurities, such as SiO 2 , MnO, and Al 2 O 3 , in varying proportions. Compared to XRD results, it was consistent with XRF; the phase compositions of iron ore were mainly hematite (Fe 2 O 3 ). The XRD revealed that hematite was the major mineral component in the Lhoong iron ores. SEM observation showed fine crystalline structure of Lhoong iron ore after the milling process. The main mineral morphology was microcrystalline in agglomerate forms. The magnetic properties of the samples after milling showed the increasing in the remanent (B ) and coercivity (H ). This increasing can be explained that nano-Fe 2 O 3 phase after milling for 20 hours plays an important role in the magnetic behavior of Lhoong iron ore. It is understood that the longer milling time is sufficient to complete the transformation of hematite (Fe 2 O 3 ) to magnetite (Fe 3 O 4 ).

Interactive toxicity effect of combined exposure to hematite and amorphous silicon dioxide nanoparticles in human A549 cell line

“…Some studies reported that the interactions of the biological systems with nanoparticles were influenced by the corona phenomena-derived protein layer, with subsequent changes of their surfaces and increasing their sizes (Simon-Deckers et al, 2008). In respect of nanoparticle sizes, some authors speculated the size and the changes of the physical shape of nanoparticles could be a mechanistic factor for their toxicity (Di Pasqua et al, 2008; Rahwanto et al, 2013). At the same time, other researchers have argued that the toxicity of nanoparticles is not entirely dependent on their surface charge and size, and other surface properties such as functional groups or other pollutants are more important ((Malvindi et al, 2014).…”

Optimization of hematite nanoparticles from natural ore as novel imaging agents: A Green Chemistry approach

“…Utilizing this abundant resource streamlines production and purification, yielding pristine nanoparticles for exploration in biomedical applications. 13 Inspired by recent studies, such as those by Jalil et al (2019), 14 revealing enhanced magnetic behavior in nano iron oxide from Lhoong iron ore by Rahwanto et al (2013), 15 presenting silica-free micro/nano Fe 2 O 3 particles with high iron content by Almeida et al, 16 demonstrating PEG-MN nanoparticles with remarkable properties by Kareem et al (2015). 17 Our work was motivated to contribute to this evolving landscape.…”

PREPARATION OF INORGANIC CATALYST BASED HEMATITE (a-Fe2O3) COMPOUND EXTRACTED FROM ACEH IRON ORE MINERAL AND ITS CATALYTIC ACTIVITY ON TRANSESTERIFICATION OF COCONUT OIL

“…Considering its geometrical structure, hematite (α-Fe 2 O 3 ) is one of iron oxides among magnetite (Fe 3 O 4 ) and maghemit (-Fe 2 O 3 ). Hematite compound (α-Fe 2 O 3 ) become most popular of among the iron oxide compounds due to their polymorphic properties, biochemical uniqueness, magnetic, catalytic and other properties [6][7][9][10][11][12]. Hematite has a rhombohedral shape with a central hexagonal structure and a dense oxygen lattice.…”