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Diatomaceous Earth: Characterization, thermal modification, and application by Reka, Arianit A. (author);Pavlovski, Blagoj (author);Fazlija, Emira (author);Berisha, Avni (author);Pacarizi, Musaj (author);Daghmehchi, Maria (author);Sacalis, Carmen (author);Jovanovski, Gligor (author);Makreski, Petre (author);Oral, Ayhan (author) is a Chemistry article available to read on EtoBox.

What is Diatomaceous Earth: Characterization, thermal modification, and application about?

Abstract The diatomaceous earth (DE), collected from the Mariovo region in North Macedonia, was characterized and thermally modified. The material represents a sedimentary rock of biogenic origin, soft solid that can be easily disintegrated, with white to grayish color, with bulk density of 0.51–0.55 g/cm3, total porosity of 61–63%, and specific gravity of 2.25 g/cm3. The chemical composition is as follows: SiO2,86.03; Al2O3, 3.01; Fe2O3, 2.89; MnO, 0.06; TiO2,0.20; CaO, 0.76; MgO, 0.28; K2O, 0.69; Na2O, 0.19; P2O5, 0.15; and loss of ignition, 5.66 (wt%). The mineralogy of the raw DE is characterized by the predominant presence of amorphous phase, followed by crystalline quartz, muscovite, kaolinite, and feldspar. Significant changes in the opal phase are observed in the 1,000–1,200°C temperature region. At 1,100°C, the entire opal underwent solid–solid transition to cristobalite. Further ramp of the temperature (1,100–1,200°C) induced formation of mullite. Scanning electron microscopy (SEM) and transmission electron microscopy depict the presence of micro- and nanostructures with pores varying from 260 to 650 nm. SEM analysis further determined morphological changes in terms of th

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Author
Reka, Arianit A. (author);Pavlovski, Blagoj (author);Fazlija, Emira (author);Berisha, Avni (author);Pacarizi, Musaj (author);Daghmehchi, Maria (author);Sacalis, Carmen (author);Jovanovski, Gligor (author);Makreski, Petre (author);Oral, Ayhan (author)
Publisher
Walter de Gruyter GmbH
Published
2021
Language
EN
Field
Chemistry (Physical Sciences)

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