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Publications Dr Ebrahim Azimi

Application of differential bio-flocculation in the removal of hematite and goethite from kaolin and quartz Winter 2019 Feasibility of the Isfahan Feldspars Upgrading for Applications in the Tile and Ceramic Industries Winter 2017...

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Nanoscale effects of silica particle supports on the ,

Small TiO2 crystals in the anatase phase are in high demand as photocatalysts Stable TiO2 crystals in the anatase phase were obtained using a silica nanoparticle as a support The focus of this study was to investigate the nanoscale effect of the silica support on the formation and properties of small anata...

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Viscosity and Specific Gravity Values from Cole

Oct 15, 2018 0183 32 Viscosity Values and Specific Gravity Centipoise = centistokes x specific gravity where specific gravity is assumed to be 08 except for water To find the exact cp of your fluid cp = cSt x weight per gallon x 0120...

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Photocatalytic Characteristics of Nanometer

The photocatalytic characteristics of nanometer-sized TiO2 powder prepared by a homogeneous-precipitation process HPP were compared with those of a commercial powder to determine which powder ....

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Differential effects of P25 TiO2 nanoparticles on ,

Jul 01, 2016 0183 32 The X-ray diffraction pattern of as-received P25 TiO 2 NPs showed the presence of anatase 811 and rutile 189 crystalline structures Fig S1, Supplementary information The surface area of the nanoparticle was found to be 4875 m 2 /g The hydrodynamic diameters of the P25 TiO 2 NPs in deionized ultrapure water were found to be 10136 177 154, 10163 177 ,...

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Water treatment

Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environmentWater treatment removes contaminants and undesirable components, or ,...

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Polyacrylamide PAM Flocculant for Water Treatment

Polyacrylamide PAM, with the chemical formula of C3H5NO n and the CAS NO of 9003-05-8, is a linear polymer Polyacrylamide polymer has good thermal stability, can be dissolved in water in any proportion, and the aqueous solution is a uniform and transparent liqu PAM is one of the most widely used water-soluble polymers...

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Effect of Concentration and Composition of Anionic ,

The effect of concentration and composition of the acrylamide copolymers on their integral and differential flocculation activities was analyzed Discover ,...

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Liquid Stream Fundamentals Sedimentation

particles start interacting with each other through collision and differential settling re-sulting in formation of larger particles through flocculation Hindered or Zone Settling Type III Hindered or zone settling refers to settling where strong inter-particle forces result in formation of a matrix of particles that settle together...

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Preparation and characterization of TiO2 generated from ,

Nov 15, 2019 0183 32 Then the grinded samples were incinerated for 2 h at a temperature of 600 176 C to obtain anatase titania Finally, two types of powdered TiO 2 were prepared one from flocculation using only TiCl 4 and the other from flocculation using both TiCl 4 and Ca OH 2 The TiO 2 preparation process in this study was adapted from Kim et al, 2011...

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Calciothermic Synthesis of Very Fine, Hydrogenated Ti and ,

This was confirmed by differential calorimetric analysis, shown in our former work, for anatase activated in the shaker mill in comparison with the planetary ball mill 22 The reduction product CaO preserves approximately the same size as the starting material CaH 2 It acts as a particle separator and prevents sintering of the particles, which ....

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Genome sequencing, assembly, and annotation of the self ,

Oct 27, 2020 0183 32 Scenedesmus obliquus belongs to green microalgae and is widely used in aquaculture as feed, which is also explored for lipid production and bioremediation However, genomic studies of this microalga have been very limited Cell self-flocculation of microalgal cells can be used as a simple and economic method for harvesting biomass, and it is of great ,...

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Water Dissociation and Hydroxyl Ordering on Anatase ,

Nov 15, 2018 0183 32 We studied the interaction of water with the anatase TiO 2 001 surface by means of scanning tunneling microscopy, x-ray photoelectron spectroscopy, and density functional theory calculations Water adsorbs dissociatively on the ridges of a 1 4 reconstructed surface, resulting in a 3 4 periodic structure of hydroxyl pairsWe observed ,...

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Synthesis of Nanostructured Anatase Mesoporous Membranes ,

Mar 21, 2013 0183 32 In this work, the nanostructured anatase mesoporous membranes were prepared for water ultrafiltration UF process with photocatalytic and physical separation capabiliti A macroporous substrate was synthesized from α -Al 2 O 3 , then a colloidal titania sol was used for the preparation of the intermediate layer...

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Photocatalytic and adsorption properties of TiO2

Jan 31, 2018 0183 32 The TiO 2-PMMHx samples Fig 2 showed significantly more sharp and intense peaks of the anatase and rutile phases at the above mentioned anglIn addition, the anatase peak becomes visible at 2θ = 377 176 These results demonstrate that in the preparation of the pillared materials employing hydrothermal treatment, the TiO 2 pillars crystallize in the ,...

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Differential adhesion of Streptococcus gordonii to anatase ,

Differential adhesion of Streptococcus gordonii to anatase and rutile titanium dioxide surfaces with and without functionalization with chlorhexidine J Biomed Mater Res A 2009 Sep 15 90 4 993-8 doi 101002/jbma32170...

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Exposure to TiO2 nanoparticles increases Staphylococcus ,

Apr 22, 2016 0183 32 Titanium dioxide TiO2 is one of the most common nanoparticles found in industry ranging from food additives to energy generation Approximately four million tons of TiO2 particles are produced worldwide each year with approximately 3000 tons being produced in nanoparticulate form, hence exposure to these particles is almost certain Even though TiO2 is ,...

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Rapid Plasma Reagin RPR Test for the diagnosis of Syphilis

Aug 15, 2019 0183 32 Rapid Plasma Reagin RPR Test for the diagnosis of Syphilis Rapid plasma reagin RPR is macroscopic, non treponemal, flocculation card test used to screen for syphilis caused by Treponema pallidum RPR is simple test can be done within few minut This test is less sensitive than treponemal test in early syphilis infection...

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Nanosized TiO2 Photocatalyst Powder via Sol

TG/DTA curves showed that amorphous phase turned to anatase crystal structure at ca 415, 337, 310, and C for Powders A, B, C, and D, respectively XRD analysis showed that all the synthesized powders were 100 in anatase form with Powders B and C showing considerably higher crystalliniti The powders obtained at lower water to TPT mol ratios ....

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Preparation of Titanium Dioxide TiO2 from Sludge ,

3 Al flocculation Removal of organic matter and different molecular sizes by Ti-salt flocculation was similar to that the of most widely-used Fe- and Al-salt flocculation The mean sizeof Ti -, Fe- and Al-salt flocs was 475 μm, 425 μm and 169 μm, respectively The decantability of the settled flocs by TiCl...

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Kaolin Al2H4O9Si2

Kaolin is an aluminosilicate soft white mineral named after the hill in China Kao-ling from which it was mined for centuri In its natural state kaolin is a white, soft powder consisting principally of the mineral kaolinite, and varying amounts of other minerals such as muscovite, quartz, feldspar, and anatase...

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Differential Effect of Solar Light in Increasing the ,

The increasing use of silver Ag and titanium dioxide TiO2 nanoparticles NPs in consumer products and their inevitable seepage into the environment prompted us to investigate their potential toxicity to a fish cell line BF-2 and zebrafish embryos under dark and Simulated Solar Light SSL exposure conditions Using high throughput screening HTS platforms, we ,...

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Publications دکتر ابراهیم عظیمی

Publications Journal Papers Combined photocatalytic-adsorptive removal of water contaminants using a biologically prepared CdS-diatomite nanocomposite Spring 2021 Hybrid PSO enhanced ANN model and central composite design for modelling and optimization of Low-Intensity magnetic separation of hematite Summer...

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Titanium dioxide in our everyday life is it safe?

Nov 16, 2011 0183 32 Zhu et al 39 anatase or 200 nm rutile TiO 2 demonstrated clear differences in the cytotoxicity and the extent of DNA strand scission, together with the formation of 8-hydroxy-2-deoxyguanosine 8-OHdG adducts in isolated DNA, after a treatment with different types of TiO 2 NPs in the order 10-20 nm anatase >50-60 nm anatase >50-60 nm rutile...

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Effect of Flocculation on the Dilatant Flow for Aqueous ,

Jul 24, 2000 0183 32 The rheological properties were studied for suspensions of two titanium dioxide Anatase powders with different particle sizes dispersed in water by adding sodium pyrophosphate as the dispersing agent Using a capillary viscometer, flow measurements were made under conditions of varying amounts of dispersing agent as well as shear histories of ,...

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Differential evolution

Sep 16, 2021 0183 32 Two main directions can be distinguished altering the materials crystallinity rutile/anatase ratio 48,49,50 and the use of doping with non-metals such as C, N and S, transition metals such as ....

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PDF Study on kinetic of UV and solar assisted ,

different electronic band structures, leading to different Chemical disinfection options, flocculation, filtering, band gaps energy15,16 The band gap energy of anatase is biological treatment, air stripping, adsorption on granulat- 3?20 eV and rutile is 3?02 eV...

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China Clay Product Association

They include differential flocculation of anatase DFA to remove titanium and iron, magnetic separation to remove iron and titanium, and ozonation to remove organics or carbonaceous matter DFA involves the introduction of a chemical into slurried kaolin at optimum solids and temperature levels in a controlled environment which changes the ....

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Evaluation of hydrophobically associating cationic starch ,

Jun 03, 2021 0183 32 The content of bound water in sludge cake was measured by a differential scanning calorimetry analyzer TA, US , and the detailed detected method was described in Supporting Information Text S1 ....

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Comparison of two cationic chitosan

The flocculation efficiency of CS-g-DAC T was little higher than that of CS-g-DAC V in terms of higher removal rate of kaolin and kaolin humic acid sodium and wider range of optimal dosage in the treatment of humic acid sodium and fulvic ac The charge neutralization of two CS-based flocculants was uniform as the similar zeta potential ....

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