Study of the Influence of Granite Residue in Different Compositions to Prepare Ceramic Membranes

2014 ◽  
Vol 798-799 ◽  
pp. 542-547 ◽  
Author(s):  
Rosa Carmo Oliveira Lima ◽  
H.L. Lira ◽  
G.A. Neves ◽  
M.C. Silva ◽  
K.B. França
Keyword(s):  
Ceramic Membrane ◽  
Raw Materials ◽  
Ceramic Body ◽  
Mercury Porosimetry ◽  
Morphological Characteristics ◽  
Ceramic Membranes ◽  
Flux Measurements ◽  
Dark Color ◽  
Scanning Electron

The exploitation and processing of granite is responsible for generating large quantities of residue, mainly in the sawing step where is producing a dark color mud that is generally discharged directly in the environment without any treatment. The use of granite residue in the production of red ceramic has been widely studied and has shown promising results. The aim of this work is to verify the incorporation of granite residue in the preparation of tubular ceramic membrane in substitution of quartz. In this research it was done the characterization of the raw materials, the membrane preparation with different amount of granite residue and characterization of the membranes by scanning electron microscopy, mercury porosimetry and tangential flux measurements. The results showed that the changing in 10% of granite residue amount in the ceramic body was enough to change the morphological characteristics of the membranes.

Synthesis and Properties of Cerium Oxide Nanoparticles

2011 ◽  
Vol 299-300 ◽  
pp. 118-121 ◽  
Author(s):  
Yong Li ◽  
Jin Gui He ◽  
Xiao Wei Huang
Keyword(s):  
Cerium Oxide ◽  
Raw Materials ◽  
Morphological Characteristics ◽  
Treatment Temperature ◽  
Precipitation Method ◽  
Thermal Treatment Temperature ◽  
X Ray ◽  
Structure And Morphology ◽  
Dispersing Agent ◽  
Scanning Electron

Cerium oxide(CeO2)nanoparticles were synthesized via a precipitation method using cerous sulfate, ammonia water and cetyl three methyl brominated ammoniu(CTAB) as raw materials. The effect of thermal treatment temperature and dispersing agent on the crystal structure and morphology were discussed. The structural evolutions and morphological characteristics of the nanoparticles were investigated using X-ray diffractometery, scanning electron microscopy, Fourier transform infrared spectroscopy. The results showed that the broadening of CeO2peaks decreases by the increasing in heat-treatment temperature and the dispersing agent playes key roles in microstructure of the CeO2.

Ceramic Membrane Made of Alumina Synthesized by Pechini Method for Application in Microfiltration Processes

2015 ◽  
Vol 820 ◽  
pp. 79-83 ◽  
Author(s):  
Mirele Costa da Silva ◽  
Francisco Nilson da Silva ◽  
Hélio de Lucena Lira ◽  
Normanda Lino de Freitas
Keyword(s):  
Total Mass ◽  
Pore Diameter ◽  
Ceramic Membrane ◽  
Pechini Method ◽  
Mercury Porosimetry ◽  
Ceramic Membranes ◽  
Chemical Methods ◽  
Average Pore ◽  
Total Mass Loss ◽  
Alpha Alumina

Given the diversity of areas in which applications of ceramic membranes are included, the literature has shown great interest of researchers to obtain these materials with powders synthesized by different chemical methods. Thus, this work aims at the synthesis of alumina by Pechini method, the 2:1 ratio of citric acid: metal cations, calcined to 1100°C, to obtain membranes. The synthesized powders were characterized by thermal analysis, XRD and particle size distribution, since the membranes were characterized by SEM and mercury porosimetry. The results for the obtained powders showed total mass loss of 61.60%, an alpha-alumina phase with crystallite size of 45.2 nm. As for the membranes, these showed heterogeneously distributed particles with different sizes and irregular geometry, reaching average pore diameter of 0.6 μm me 47% porosity, and thus are characterized for application in microfiltration processes.

scholarly journals Obtention and Characterization of Ferrous Chloride FeCl2·4H2O from Water Pickling Liquors

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4840
Author(s):  
Lorena Alcaraz ◽  
Belén Sotillo ◽  
José F. Marco ◽  
Francisco J. Alguacil ◽  
Paloma Fernández ◽  
...  
Keyword(s):  
Waste Water ◽  
Structural Characteristics ◽  
Morphological Characteristics ◽  
Aged Sample ◽  
X Ray Diffraction ◽  
Ferrous Chloride ◽  
Photoluminescence Study ◽  
X Ray ◽  
Scanning Electron

As a hazardous waste, water pickling liquors must be properly treated. An alternative consists of promoting the formation of ferrous salts from this residue due to their higher ferrous content. Since FeCl2·4H2O is widely used in several applications, obtaining pure crystals of this material appears to be an interesting prospect. However, this compound has scarcely been investigated. In the present work, FeCl2·4H2O crystals were obtained from water pickling liquors. Their structural and morphological characteristics were investigated by X-ray diffraction, scanning electron microscopy as well as Mössbauer spectroscopy. In addition, the photoluminescence study of the obtained samples was also assessed. It was observed that after some aging time, the obtained crystals changed in colour from green to more yellowish. As such, the aged sample was also evaluated, and their structural characteristics were compared with the original crystals. Despite this, the obtained crystals exhibit a FeCl2·4H2O structure, which is not modified with the aging of the sample.

scholarly journals Phosphate Mine Tailing Recycling in Membrane Filter Manufacturing: Microstructure and Filtration Suitability

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 318 ◽  
Author(s):  
Mohamed Loutou ◽  
Wafa Misrar ◽  
Mohammed Koudad ◽  
Mohammed Mansori ◽  
Liga Grase ◽  
...  
Keyword(s):  
Mine Tailings ◽  
Textile Industry ◽  
Ceramic Membrane ◽  
Membrane Filter ◽  
Mercury Porosimetry ◽  
Industrial Effluent ◽  
Ceramic Membranes ◽  
Effluent Treatment ◽  
Membrane Filters ◽  
Phosphate Mine

Ceramic membrane filters based on industrial by-products can be considered to be a valorization alternative of phosphate mine tailings, even more so if these ceramic membranes are used in the industrial wastewater treatment due to their good mechanical, chemical, and thermal resistance. The depollution of textile industry rejections with this method has not been studied in detail previously. In this work, ceramic membrane filters have been manufactured from natural clay and phosphate mine tailings (phosphate sludge). Blends of the abovementioned materials with a pore-forming agent (sawdust, up to 20 wt. %) were investigated in the range 900–1100 °C using thermal analysis, X-ray diffraction, scanning electron microscopy, and mercury porosimetry. Ceramic properties were measured as a function of firing temperature and sawdust addition. Filtration tests were carried out on samples with advantageous properties. The results showed that gehlenite together with diopside neoformed from lime decomposed carbonates and breakdown products of clay minerals, while calcium phosphate derived from partial decomposition of fluorapatite. Both quartz and fluorapatite resisted heating. The results of the experimental design showed that the variations of physical properties versus processing factors were well described by the polynomial model. Filtration results are quite interesting, allowing these membranes to be used in industrial effluent treatment.

scholarly journals Preparation of multilayer polyelectrolyte ceramic membrane for water disinfection

2020 ◽  
Vol 20 (8) ◽  
pp. 3207-3215
Author(s):  
Mohamed Boussemghoune ◽  
Chikhi Mustapha ◽  
Yasin Ozay ◽  
Nadir Dizge
Keyword(s):  
Electron Microscopy ◽  
Escherichia Coli ◽  
Ceramic Membrane ◽  
Ceramic Membranes ◽  
Water Disinfection ◽  
Clay Material ◽  
Test Results ◽  
E Coli ◽  
The Impact ◽  
Scanning Electron

Abstract A multilayer polyelectrolyte ceramic membrane using LbL was assembled to test the performance of water disinfection capability. The natural raw clay material (kaolin) was used as the main ceramic membrane (CM) support. The impact of the number of polyelectrolyte bilayers (2, 4, 6) on the retention of Escherichia coli was systematically investigated. Test results showed the water permeability coefficients (Lp) were 85.3 L/m2.h.bar and 69.5, 28.3, 50.1 L/m2.h.bar for pristine (CM0) and ceramic membranes with two bilayers (CM2), four bilayers (CM4), and six bilayers (CM6), respectively. Complete retention of E. coli was achieved by the multilayer polyelectrolyte ceramic membrane with four bilayers. The surface morphology of the multilayer polyelectrolyte ceramic membrane was identified by scanning electron microscopy (SEM). The results showed that the multilayer polyelectrolyte ceramic membrane can be safely applied in providing water disinfection.

Preparation of the Reed Cellulose Membrane by Using NMMO Method

2012 ◽  
Vol 538-541 ◽  
pp. 128-131 ◽  
Author(s):  
Mei Ling Pan ◽  
Wen Jiang Li ◽  
Ming Rui Wang ◽  
Chen You
Keyword(s):  
Aqueous Solution ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Raw Materials ◽  
Digital Camera ◽  
Optical Microscope ◽  
Cellulose Membrane ◽  
Cellulose Film ◽  
Scanning Electron

The reed cellulose was extracted from the wild reed in the hot 12% sodium hydroxide (NaOH) aqueous solution. Then, the cellulose membrane was successfully prepared by using the reed cellulose as the raw materials dissolved in the solvent of N-methylmorpholine-N-oxide (NMMO). The characterization of the reed cellulose film was studied by the digital camera, optical microscope and scanning electron microscope (SEM). The results revealed that the reed cellulose membrane is a smooth appearance and good quality film, which could have many applications in the practical filed.

scholarly journals Development and Characterization of Polypropylene Waste from Personal Protective Equipment (PPE)-Derived Char-Filled Sugar Palm Starch Biocomposite Briquettes

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1707
Author(s):  
M. M. Harussani ◽  
S. M. Sapuan ◽  
Umer Rashid ◽  
A. Khalina
Keyword(s):  
Environmental Sustainability ◽  
Batch Reactor ◽  
Morphological Characteristics ◽  
Hydraulic Press ◽  
The Other ◽  
Protective Equipment ◽  
Combustion Properties ◽  
Thermal Combustion ◽  
Scanning Electron

Slow pyrolysis using a batch reactor at 450 °C was applied to the polypropylene (PP) powder derived from Coronavirus Disease 2019 (COVID-19) isolation gown waste to yield char briquettes, using sugar palm starch (SPS) and a manual hydraulic press. These studies are significant because of reductions in plastic waste from the preparation of barbecue coal due to environmental sustainability. The results presented here include the physical, morphological, thermal, combustion, and mechanical properties of char when reinforced with various percentages of SPS loadings (0, 10, 20, 30, and 40%), which act as a matrix/binder to produce char/sugar palm starch (C/SPS) composites. The physical and morphological characteristics of C/SPS composites were determined using Fourier transform infrared (FTIR) and field emission scanning electron microscopy (FESEM). On the other hand, the thermal and combustion properties of the C/SPS briquettes were studied via thermogravimetric and bomb calorimeter analysis. The results show that the compressive strength of the briquettes increased as the SPS loading increased, whereas the higher heating values (HHV) reduced. The findings indicate that C-80/SPS-20 briquettes presented excellent combustion characteristics (1,761,430 J/g) with satisfactory mechanical strength (1.463 MPa) in the compression test. Thus, C-80/SPS-20 briquettes are the most suitable composites for domestic and commercial uses.

scholarly journals Obtention and Characterization of Ferrous Chloride FeCl2·4H2O from Pickling Waste Liquors

2021 ◽  
Author(s):  
Lorena Alcaraz ◽  
Belén Sotillo ◽  
José F. Marco ◽  
Francisco J. Alguacil ◽  
Paloma Fernández ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Structural Characteristics ◽  
Morphological Characteristics ◽  
Aged Sample ◽  
X Ray Diffraction ◽  
Ferrous Chloride ◽  
Photoluminescence Study ◽  
X Ray ◽  
Scanning Electron

As a hazardous waste, pickling waste liquor must be properly treated. An alternative consists in promoting the formation of ferrous salts from this residue, due to its higher ferrous content. Since FeCl2·4H2O is widely used in several applications, obtaining pure crystals of this material appears to be an interesting prospect. However, this compound has scarcely been investigated. In the present work, FeCl2·4H2O crystals have been obtained from pickling waste liquors. Their structural and morphological characteristics have been investigated by X-ray diffraction, scanning electron microscopy as well as Mössbauer spectroscopy. In addition, the photoluminescence study of the obtained samples was also assessed. It was observed that after some aging time, the obtained crystals change in colour from green to more yellowish. So, the aged sample has also been evaluated, and their structural characteristics are compared with the original crystals. Despite this, the obtained crystals exhibit a FeCl2·4H2O structure, which is not modified with the aging of the sample.

scholarly journals CHEMICAL-MINERАLOGICAL CHARACTERIZATION OF BAUXITES FROM DIFFERENT DEPOSITS

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Gordana Оstojić ◽  
Dragica Lazić ◽  
Branko Škundrić ◽  
Jelena Penavin Škundrić ◽  
Slavica Sladojević ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Raw Materials ◽  
Mineralogical Composition ◽  
Chemical Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

From the aspect of their chemical and mineralogical composition, bauxites are very complex multicomponent raw materials. The paper presents the characterization of bauxite from several different deposits: Brazil, Milići, Čitluk and Kosovo. Chemical characteristics were determined by a combination of different analytical methods: gravimetry, potentiometric titration, atomic absorption spectroscopy (AAS) and UV-VIS spectrophotometry. Mineralogical composition was determined using X-ray diffraction and thermal analysis methods. Chemical and structural characterization is complemented by the results of scanning electron microscopy with EDX analysis. The information obtained was used for the assessment of the quality of investigated bauxites from the aspect of their application in the production of alumina.

Synthesis and Characterization of BaCO3 Nanoparticles with Different Morphologies by Microwave Homogenous Precipitation

2013 ◽  
Vol 32 (1) ◽  
pp. 47-50
Author(s):  
Guo Chen ◽  
Jin Chen ◽  
Lijun Liu ◽  
C. Srinivasakannan ◽  
Jinhui Peng
Keyword(s):  
Raw Materials ◽  
Precipitation Method ◽  
Synthesis And Characterization ◽  
Homogeneous Precipitation ◽  
Tetraacetic Acid ◽  
X Ray ◽  
Homogeneous Precipitation Method ◽  
Scanning Electron ◽  
Composition Of Products

AbstractBaCO3 nanoparticles with different morphologies including needle-like, rod-like, bird's nest-like and flower-like have been successfully synthesized by the microwave homogeneous precipitation method using BaCl2·2H2O, NaOH and (NH2)2CO as raw materials with the help of different guide reagents, such as citric acid (CA), sodium triphosphate (STPP) and ethylene diamine tetraacetic acid (EDTA). Their phases and morphologies were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), respectively. The characterization results show that different guide reagents have little effect on the phase structure and composition of products while they play significant roles in determining the morphology of products. All the synthesized BaCO3 nanoparticles have typical orthorhombic structures that are well-crystallized.

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