Influences of CO2 Bubbling Types on Preparation of Calcite Nanoparticles by Carbonation Process

This study investigates the comparison of influences of CO2 bubbling into the calcium hydroxide (Ca(OH)2) slurry through a microbubble generator (MBG) and an ordinary CO2 generator (OCG) on the preparation of calcite nanoparticles by a carbonation method. Each obtained precipitate was characterized using XRD, SEM and particle size analyses. During the carbonation process at each CO2 flow rates, it was determined that the MBG generates tiny bubbles whereas an increase in CO2 flow rates led to an increase bubble size when the OCG was used. The flow rate of CO2 was not an important parameter with using the MBG as calcite nanoparticles were prepared (<125 nm) at each CO2 flow rates. The necessary time for the complete reaction decreases with an increase in the CO2 flow rates through the MBG in comparison to the OCG. To produce calcite nanoparticles with a high production recovery in shorter times, the MBG should be adopted to the carbonation reactor

Effect of Alkaline Types on the Production of Calcium Carbonate Particles from Gypsum Waste for Fixation of CO2 by Mineral Carbonation

WOS: 000462863200001Industrial by-products have been used as an alternative raw material for the long-term storage of CO2 as a mineral carbonate with various polymorphs and properties. For example; desulfurization gypsum (DG) obtained from a power station has great potential due to its high CaO content. This study used a mineral carbonation process to produce CaCO3 particles (PCC) from DG wastes for fixation of CO2 The effects of solid-to-liquid ratio (1:13, 1:9, and 1:7) and hydroxide sources (NaOH, NH4OH) on properties of PCC were determined using XRD, SEM, FTIR, AAS, and wet chemical analyses. Calcite crystals were produced in all cases with the use of NaOH, whereas calcite crystals along with spherical vaterite crystals were observed in the presence of NH4+. This study suggested a good option due to not only fixation of CO2 but also production of PCC with a high purity.Cukurova UniversitesiCukurova University [FBA-2017-7912]This work was supported by the Cukurova Universitesi [FBA-2017-7912]

Influences of CO(2 )Bubbling Types on Preparation of Calcite Nanoparticles by Carbonation Process

WOS: 000432753600012This study investigates the comparison of influences of CO2 bubbling into the calcium hydroxide (Ca(OH)(2)) slurry through a microbubble generator (MBG) and an ordinary CO2 generator (OCG) on the preparation of calcite nanoparticles by a carbonation method. Each obtained precipitate was characterized using XRD. SEM and particle size analyses. During the carbonation process at each CO2 flow rates, it was determined that the MBG generates tiny bubbles whereas an increase in CO2 flow rates led to an increase bubble size when the OCG was used. The flow rate of CO2 was not an important parameter with using the MBG as calcite nanoparticles were prepared (< 125 nm) at each CO(2)flow rates. The necessary time for the complete reaction decreases with an increase in the CO2 flow rates through the MBG in comparison to the OCG. To produce calcite nanoparticles with a high production recovery in shorter times, the MBG should be adopted to the carbonation reactor.Research Fund Project of Cukurova University [FBA-2017-7912]The project presented in this article is supported by Research Fund Project of Cukurova University [Grant Number: FBA-2017-7912]

Effect of Alkaline Types on the Production of Calcium Carbonate Particles from Gypsum Waste for Fixation of CO₂ by Mineral Carbonation

<p>Industrial by-products have been used as an alternative raw material for the long-term storage of CO₂ as a mineral carbonate with various polymorphs and properties. For example; desulfurization gypsum (DG) obtained from a power station has great potential due to its high CaO content. This study used a mineral carbonation process to produce CaCO₃ particles (PCC) from DG wastes for fixation of CO₂ The effects of solid-to-liquid ratio (1:13, 1:9, and 1:7) and hydroxide sources (NaOH, NH₄OH) on properties of PCC were determined using XRD, SEM, FTIR, AAS, and wet chemical analyses. Calcite crystals were produced in all cases with the use of NaOH, whereas calcite crystals along with spherical vaterite crystals were observed in the presence of NH₄⁺. This study suggested a good option due to not only fixation of CO₂ but also production of PCC with a high purity.</p

Preparation of periclase (MgO) nanoparticles from dolomite by pyrohydrolysis-calcination processes

WOS: 000417203500001Dolomite is one of the most important resources for producing periclase (MgO) nanoparticles, which are of highly demanded in many industrial applications. For that reason, this study investigated to prepare MgO nanoparticles from dolomite through pyrohydrolysis-calcination processes. Each obtained product was characterized using X-ray fluorescence, scanning electron microscope, X-ray diffraction, and wet chemical and image processing analyses. Synthetic aragonite (CaCO3) crystals and CO2 gas were obtained as by-products. The experimental results indicate that each obtained product was identified as a periclase mineral, and the production temperature played a curial role for producing pure MgO nanoparticles. However, the reactivity and particle size distribution of each product were strongly influenced by the production temperature. The particle size of the product obtained at various temperatures ranged from 180.05nm to 6m depending on the production condition. We determined that the calcination process should be conducted to produce MgO nanoparticles. The proposed method brings a new perspective to researchers for the production of MgO nanoparticles from dolomite. (c) 2017 Curtin University and John Wiley & Sons, Ltd.Cukurova UniversityCukurova University [MMF2013D18, FBA-2017-7912]The authors would like to thank the Research Fund Project (MMF2013D18 and FBA-2017-7912) of the Cukurova University for the financial support in this study

The effect of major element oxide and moisture loss on grindability of Afsin-Elbistan low-grade coal

WOS: 000410554100003In this paper, the influences of major element oxides and moisture loss in coal on its grindability were examined using the Hardgrove equipment. The major element oxides in the coal could be a predictor of HGI. If CaO content in the coal was high, the grindability of coal could be easier. The moisture loss in the coal had a strong effect on the grindability property. The pH could be a good indicator to predict and classify HGI. If the pH is lower than 9.5, HGI is also lower than 53 and those type of coal was classified as heavily grindable.Cukurova UniversityCukurova University [FBA-2015-5246]The authors thank the Research Fund Project (FBA-2015-5246) of Cukurova University for their financial support in this study

Germline landscape of BRCAs by 7-site collaborations as a BRCA consortium in Turkey

BRCA1/2 mutations play a significant role in cancer pathogenesis and predisposition particularly in breast, ovarian and prostate cancers. Thus, germline analysis of BRCA1 and BRCA2 is essential for clinical management strategies aiming at the identification of recurrent and novel mutations that could be used as a first screening approach. We analyzed germline variants of BRCA1/2 genes for 2168 individuals who had cancer diagnosis or high risk assessment due to BRCAs related cancers, referred to 10 health care centers distributed across 7 regions covering the Turkish landscape. Overall, 68 and 157 distinct mutations were identified in BRCA1 and BRCA2, respectively. Twenty-two novel variants were reported from both genes while BRCA2 showed higher mutational heterogeneity. We herein report the collective data as BRCA Turkish consortium that confirm the molecular heterogeneity in BRCAs among Turkish population, and also as the first study presenting the both geographical, demographical and gene based landscape of all recurrent and novel mutations which some might be a founder effect in comparison to global databases. This wider perspective leads to the most accurate variant interpretations which pave the way for the more precise and efficient management affecting the clinical and molecular aspects