scholarly journals Correlation of Nano Titanium Dioxide Synthesis and the Mineralogical Characterization of Ilmenite Ore as Raw Material

2021 ◽  
Vol 12 (4) ◽  
pp. 749
Author(s):  
Yayat Iman Supriyatna ◽  
Widi Astuti ◽  
Slamet Sumardi ◽  
Sudibyo Sudibyo ◽  
Agus Prasetya ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Raw Material ◽  
Mineralogical Characterization ◽  
Nano Titanium Dioxide

scholarly journals Removal of amoxicillin from aqueous solution using sludge-based activated carbon modified by walnut shell and nano-titanium dioxide

2020 ◽  
Author(s):  
Xiaorong Kang ◽  
Yali Liu ◽  
Can Yang ◽  
Han Cheng
Keyword(s):  
Aqueous Solution ◽  
Titanium Dioxide ◽  
Activated Carbon ◽  
Adsorption Process ◽  
Removal Rate ◽  
Total Pore Volume ◽  
Raw Material ◽  
Walnut Shell ◽  
Order Kinetic ◽  
Nano Titanium Dioxide

Abstract Dewatered municipal sludge was used as raw material to prepare activated carbon (SAC), and the SAC was modified by walnut shell and nano-titanium dioxide (MSAC). The results showed that the MSAC had a higher specific surface area (SBET) (279.147 m2/g) and total pore volume (VT) (0.324 cm3/g) than the SAC. Simultaneously, the functional groups such as C-O, C = O, and Ti-O-Ti on the surface of MSAC were enhanced due to modification. These physicochemical properties provided prerequisites for the diffusion and degradation of pollutants in MSAC. Furthermore, the MSAC was applied to adsorb amoxicillin (AMX) from aqueous solution, in batch experiments, the maximum removal rate (88.19%) was observed at an initial AMX concentration of 30 mg/L, MSAC dosage of 5.0 g/L, pH of 8, contact time of 180 min, and temperature of 25 °C. In addition, the adsorption process was well described by the Freundlich isotherm model and pseudo-second-order kinetic model, indicating that the adsorption of AMX onto MSAC was dominated by multilayer chemisorption. Also, the adsorption thermodynamics suggested that the adsorption process of AMX onto MSAC was endothermic, feasible and spontaneous.

Characterization of Waste from the Production of Titanium Dioxide (UOW) for Reuse in Other Processes

2021 ◽  
Vol 47 (3) ◽  
pp. 590-600
Author(s):  
José da Silva Andrade Neto ◽  
Nilson Santana de Amorim Júnior ◽  
Vitor Souza Santos ◽  
Bruna Bueno Mariani ◽  
Diana Dayse Mariano de Albuquerque ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Environmental Issues ◽  
Ceramic Materials ◽  
Raw Material ◽  
Industrial Processes ◽  
New Materials ◽  
Physical Chemical ◽  
Expected Performance ◽  
Starting Point

The reuse of waste generated in several industrial processes through the development of new materials for civil construction has been shown to be a viable alternative to meet environmental issues. New products can be developed that satisfy the expected performance and durability requirements while including this material. The main starting point for the development of projects that seek the safe use of these wastes is an extensive characterization. Unreacted Ore Waste (UOW), a waste generated during the production of titanium dioxide (TiO2), was characterized in terms of its physical, chemical, mineralogical, environmental, and radiological, as well as thermal properties. There is currently no effective reuse plan for UOW and it is disposed of in industrial landfills. From the characterization, possible routes for using UOW are identified, such as its addition to mortars with photocatalytic potential, and its use as a raw material in the production of Portland cement and ceramic materials.

Chemical and mineralogical characterization of a Cretaceous clay from the Lousã Basin (Central Portugal)

Clay Minerals ◽  
1988 ◽  
Vol 23 (4) ◽  
pp. 411-422 ◽  
Author(s):  
M. I. Prudêncio ◽  
J. C. Waerenborgh ◽  
J. M. P. Cabral
Keyword(s):  
Iron Age ◽  
Mossbauer Spectroscopy ◽  
Archaeological Site ◽  
Raw Material ◽  
Mineralogical Characterization ◽  
Size Fractions ◽  
Central Portugal ◽  
Compositional Group ◽  
Mineralogical Compositions

AbstractSamples of two lenticular clay bodies from a Cretaceous deposit near Padrão (Lousã basin) were characterized by INAA, XRD and Mössbauer spectroscopy. This clay is believed to be the raw material used to manufacture the Iron Age and Roman fine grey pottery from Conímbriga. The differences observed in the chemical and mineralogical compositions of the clay samples and of different size fractions are consistent with the high variance found in the compositional group corresponding to that archaeological site.

Mineralogical Characterization of Villa Reyes México Kaolin for Industrial Applications

2008 ◽  
Vol 569 ◽  
pp. 341-344
Author(s):  
F. Vázquez Acosta ◽  
Leticia M. Torres-Martínez ◽  
Lorena L. Garza-Tovar ◽  
A. Martínez-de la Cruz ◽  
Wallter López González
Keyword(s):  
Optical Microscopy ◽  
Morphological Characteristics ◽  
Fluorescence Analysis ◽  
Volcanic Glass ◽  
Industrial Applications ◽  
Raw Material ◽  
Al2o3 Content ◽  
Mineralogical Characterization ◽  
X Ray

A kaolin obtained from a region near to San Luis Potosí (México) was characterized by X-ray powder diffraction (DRX), optical microscopy (OM), scanning electron microscopy (SEM), X-ray fluorescence (XRF), thermal analysis (DTA/TGA), and chemical analysis. Mineralogical and morphological characteristics of the mineral are presented. The kaolin sample was formed mainly by kaolinite, but other minor phases were also detected such as quartz, cristobalite, trydimite, and dolomite. For iron lixiviation process, concentrate HCl was employed. The high content of volcanic glass detected, evidenced by optical microscopy, revealed an incomplete kaolinization process of the raw material. In agreement with these results, X-ray fluorescence analysis showed high- SiO2 and low-Al2O3 content in the sample as is expected on weakly kaolinized materials.

Synthesis and Structural Characterization of Surface-Modified TiO2

2010 ◽  
Vol 129-131 ◽  
pp. 154-158 ◽  
Author(s):  
Bao Wei Hao ◽  
Yuan Li ◽  
Shi Zhao Wang
Keyword(s):  
Titanium Dioxide ◽  
Oleic Acid ◽  
Structural Characterization ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Nano Structure ◽  
Gel Method ◽  
Surface Modified ◽  
Nano Titanium Dioxide

oleic acid-modified nano-titanium dioxide were synthesized by Oleic acid and tetrabutyl titanate via the sol-gel method, and characterized by IR TEM TG-DT A and XPS. Comparison with the data of the IR, the combination of carboxyl is chelating with Ti atoms. Based on the analysis of IR, TG-DTA and XPS, this paper suggests a model about the oleic acid-modified titanium dioxide nano-structure, and to provide a basis for future applications.

Effect of the Addition of Unreacted Ilmenite (UOW) on the Hydration of White Portland Cement - Hydrated Lime Pastes

2019 ◽  
Vol 803 ◽  
pp. 289-293
Author(s):  
José da Silva Andrade Neto ◽  
Diana Dayse Mariano de Albuquerque ◽  
Nilson Santana Amorim Júnior ◽  
Daniel Véras Ribeiro
Keyword(s):  
Titanium Dioxide ◽  
Portland Cement ◽  
Raw Materials ◽  
Setting Time ◽  
Hydrated Lime ◽  
Calcium Sulphate ◽  
Mineralogical Characterization ◽  
Time Determination ◽  
White Portland Cement

This paper evaluates the effect of the incorporation of unreacted ilmenite (UOW), waste from the production of titanium dioxide, on the hydration of white Portland cement – hydrated lime pastes. For this, after the physical and mineralogical characterization of the raw materials, pastes with additions of 5%, 10% and 15% of UOW, in relation to cement weight, besides a reference paste (without UOW), were molded. Tests of setting time determination by Vicat needle and semi-adiabatic calorimetry tests were carried out, as well as thermogravitry analysis of pastes at 7 days of curing. The addition of UOW, due to the presence of anhydrite (calcium sulphate) in its composition, is responsible for delaying the hydration of the white Portland cement – hydrated lime pastes, increasing the setting time and reducing the heat release. Despite the influence in the first hours, the waste did not influence significantly the contents of combined water and portlandite formed in the pastes at 7 days.

Evaluation of the Influence of the Waste Originated by the Production of Titanium Dioxide (URM) on the Physical-Mechanical Properties of Coating Mortars

2018 ◽  
Vol 765 ◽  
pp. 319-323
Author(s):  
Diana Dayse Mariano de Albuquerque ◽  
José da Silva Andrade Neto ◽  
Nilson Santana de Amorim Júnior ◽  
Vitor Souza Santos ◽  
Daniel Véras Ribeiro
Keyword(s):  
Titanium Dioxide ◽  
Mechanical Strength ◽  
Capillary Absorption ◽  
Contemporary Society ◽  
Waste Generation ◽  
Economic Costs ◽  
Mineralogical Characterization ◽  
Physical Chemical ◽  
Feasible Alternative

Waste generation is one of the main problems of contemporary society, resulting in high economic costs and environmental impacts, such as the contamination of water sources, groundwater and soil. In this context, there is the unreacted mineral (URM), a waste originated by the production of titanium dioxide, which currently does not have an effective reuse plan, being deposited in a controlled landfill, generating a high economic expense for the generating company. In this way, the present work aims to evaluate the influence of URM on the properties of coating mortars. Firstly, it was carried out a physical, chemical and mineralogical characterization of the waste and, afterwards, coating mortar was prepared with additions of 0% (reference), 5%, 10% and 15% of the waste, in relation to the cement mass. The mortars were evaluated for density, porosity, capillary absorption by capillarity and mechanical strength. It was noted that the waste increased the mechanical strength of the mortars studied and did not significantly influence the other evaluated properties. Therefore, the incorporation of the waste into mortars is an interesting and feasible alternative for the destination of the URM.

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