Diatomaceous Earth: Characterization, thermal modification, and application

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,...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Reka Arianit A., Pavlovski Blagoj, Fazlija Emira, Berisha Avni, Pacarizi Musaj, Daghmehchi Maria, Sacalis Carmen, Jovanovski Gligor, Makreski Petre, Oral Ayhan
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	diatomaceous earth calcination thermal modification natural nanomaterial Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/1fc6c8ee230b48b083307c1d0794bb63
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1fc6c8ee230b48b083307c1d0794bb63
record_format	dspace
spelling	oai:doaj.org-article:1fc6c8ee230b48b083307c1d0794bb632021-12-05T14:10:43ZDiatomaceous Earth: Characterization, thermal modification, and application2391-542010.1515/chem-2020-0049https://doaj.org/article/1fc6c8ee230b48b083307c1d0794bb632021-04-01T00:00:00Zhttps://doi.org/10.1515/chem-2020-0049https://doaj.org/toc/2391-5420The 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 the pore diameters shrinkage to 120–250 nm in comparison to the larger pores found in the initial material. The results from this investigation improve the understanding of mechanism of silica phase transition and the relevant phase alterations that took place in DE upon calcination temperatures from 500 to 1,200°C.Reka Arianit A.Pavlovski BlagojFazlija EmiraBerisha AvniPacarizi MusajDaghmehchi MariaSacalis CarmenJovanovski GligorMakreski PetreOral AyhanDe Gruyterarticlediatomaceous earthcalcinationthermal modificationnatural nanomaterialChemistryQD1-999ENOpen Chemistry, Vol 19, Iss 1, Pp 451-461 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	diatomaceous earth calcination thermal modification natural nanomaterial Chemistry QD1-999
spellingShingle	diatomaceous earth calcination thermal modification natural nanomaterial Chemistry QD1-999 Reka Arianit A. Pavlovski Blagoj Fazlija Emira Berisha Avni Pacarizi Musaj Daghmehchi Maria Sacalis Carmen Jovanovski Gligor Makreski Petre Oral Ayhan Diatomaceous Earth: Characterization, thermal modification, and application
description	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 the pore diameters shrinkage to 120–250 nm in comparison to the larger pores found in the initial material. The results from this investigation improve the understanding of mechanism of silica phase transition and the relevant phase alterations that took place in DE upon calcination temperatures from 500 to 1,200°C.
format	article
author	Reka Arianit A. Pavlovski Blagoj Fazlija Emira Berisha Avni Pacarizi Musaj Daghmehchi Maria Sacalis Carmen Jovanovski Gligor Makreski Petre Oral Ayhan
author_facet	Reka Arianit A. Pavlovski Blagoj Fazlija Emira Berisha Avni Pacarizi Musaj Daghmehchi Maria Sacalis Carmen Jovanovski Gligor Makreski Petre Oral Ayhan
author_sort	Reka Arianit A.
title	Diatomaceous Earth: Characterization, thermal modification, and application
title_short	Diatomaceous Earth: Characterization, thermal modification, and application
title_full	Diatomaceous Earth: Characterization, thermal modification, and application
title_fullStr	Diatomaceous Earth: Characterization, thermal modification, and application
title_full_unstemmed	Diatomaceous Earth: Characterization, thermal modification, and application
title_sort	diatomaceous earth: characterization, thermal modification, and application
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/1fc6c8ee230b48b083307c1d0794bb63
work_keys_str_mv	AT rekaarianita diatomaceousearthcharacterizationthermalmodificationandapplication AT pavlovskiblagoj diatomaceousearthcharacterizationthermalmodificationandapplication AT fazlijaemira diatomaceousearthcharacterizationthermalmodificationandapplication AT berishaavni diatomaceousearthcharacterizationthermalmodificationandapplication AT pacarizimusaj diatomaceousearthcharacterizationthermalmodificationandapplication AT daghmehchimaria diatomaceousearthcharacterizationthermalmodificationandapplication AT sacaliscarmen diatomaceousearthcharacterizationthermalmodificationandapplication AT jovanovskigligor diatomaceousearthcharacterizationthermalmodificationandapplication AT makreskipetre diatomaceousearthcharacterizationthermalmodificationandapplication AT oralayhan diatomaceousearthcharacterizationthermalmodificationandapplication
_version_	1718371779518398464

Diatomaceous Earth: Characterization, thermal modification, and application

Ejemplares similares