Thermal Decomposition of Dolomite

Fang, Qin Fang; Zhang, Hong Wei; Guo, Ying

doi:10.4028/www.scientific.net/amr.177.617

Cited by 13 publications

(8 citation statements)

References 4 publications

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“…Above 500 °C, the weight loss becomes intensive owing to the decomposition of dolomite. As shown in the DTG curve, the weight loss exhibits a sharp rise above 620 °C and reaches a maximum at approximately 760 °C, which was consistent with previous reports [29] on the heatinduced phase change of dolomite. While the endothermic valley shown in the DSC curve also indicates that the phase change occurred in the range of 500 °C-800 °C, the dolomite began to decompose into MgO and Ca(CO 3 ) 2 when the temperature exceeded 500 °C, and Ca(CO 3 ) 2 further decomposed into CaO and CO 2 at 760 °C.…”

Section: Resultssupporting

confidence: 92%

Antibacterial mechanism of Xiuyan jade mineral waste as a natural inorganic antibacterial agent

Wang,

Yang

2023

Mater. Res. Express

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The Xiuyan jade waste exhibits prominent antibacterial properties after mechanical activation; these properties can be further optimized through low-temperature annealing. To elucidate its antibacterial mechanism, analysis methods involving metal-ion leaching monitoring and zeta potential analysis were used. Although the activated waste cannot be easily dissolved in water, Mg2+ and Ca2+ ions precipitated when the waste particles were dispersed in water. The particle surface showed different degrees of electronegativity, which could be the main reason for the antibacterial properties of the material. This study proved the importance of the surface electrical properties of activated waste particles on their properties by observing their adsorption capacity for methylene blue. At the annealing temperature of 270 °C, the Xiuyan jade waste exhibited the highest electronegativity and optimal antibacterial properties as well as the adsorption rate of methylene blue, verifying the significance of electronegativity of activated mineral waste powders on the antibacterial mechanism.

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Section: Resultssupporting

confidence: 92%

Antibacterial mechanism of Xiuyan jade mineral waste as a natural inorganic antibacterial agent

Wang,

Yang

2023

Mater. Res. Express

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“…Based on the reactions [23,24] just mentioned, the released Ca and Mg ions are related to the phases in the jade waste. This depends on the solubility of the phases in distilled water, which is the solvent used in the measurement.…”

Section: Contact Time Strainsmentioning

confidence: 99%

Xiuyan Jade Waste as Antibacterial Additives for Functional Coatings

Wang¹,

Wang²,

Yang³

2023

Preprint

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Jade waste is a normal byproduct that makes up much more than the amount of jade extracted. Therefore, recycling jade waste is worth investigating from the point of view of energy conservation. Moreover, it is an environment-friendly material, which is desirable for use in building materials. In this study, Xiuyan jade waste was repurposed as antibacterial additives for building coatings. The powder waste was activated by milling and subsequent annealing. The antibacterial properties of the treated waste were mostly related to the annealing temperatures. Based on the investigations of the phase change and the release of metal ions of a series of samples and their antibacterial activities, the antibacterial mechanism of the treated samples was explored experimentally. The most applicable sample for coatings was finally chosen by considering its pH values and its antibacterial abilities. Antibacterial testing showed that the addition of treated jade waste could enhance the bacterial inhibition rate of building coatings from 60% to 99.9%.

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“…Referring specifically to the impact of heating on dolomite, previous works have studied very specifically the thermal decomposition of dolomite by thermogravimetric and differential thermal analysis curves (DTG and DTA, respectively). 5–8 The classical reference McIntosh et al. 5 reports the occurrence of two peaks in DTG and DTA curves, the first associated with the formation of magnesia and calcite, and the second with the decomposition of this calcite, in these two stages …”

Section: Introductionmentioning

confidence: 99%

“…Qinfang et al 6 studied the heating at different rates with DTA, and concluded that the faster the heating, the lower the decomposition temperature for dolomite. 6 The valley temperatures for the two peaks vary on the ranges 811-750 C and 866-804 C varying the heating rate from 15 to 2 CÁmin À1 . The study of weight loss showed the tendency to fall when the heating dropped.…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of Temperature on the Optical and Structural Properties of Dolomite

et al. 2020

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The present work reports the results of structural and optical investigations in samples of natural dolomite, subjected to thermal treatment at different temperatures (500 ℃ to 700 ℃) and times (one up to three hours). The motivation is the evaluation of the changes that may occur in carbonaceous asteroids and meteorites, respectively, subjected to the action of the solar radiation and heated during the fall in the atmosphere. We carried out scanning electron microscopy, electron dispersive spectroscopy, X-ray diffraction, optical reflectance and photoluminescence measurements

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Thermal Decomposition of Dolomite

Cited by 13 publications

References 4 publications

Antibacterial mechanism of Xiuyan jade mineral waste as a natural inorganic antibacterial agent

Antibacterial mechanism of Xiuyan jade mineral waste as a natural inorganic antibacterial agent

Xiuyan Jade Waste as Antibacterial Additives for Functional Coatings

Study of the Influence of Temperature on the Optical and Structural Properties of Dolomite

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