Influence of the Layer Charge and Clay Particle Size on the Interactions between the Cationic Dye Methylene Blue and Clays in an Aqueous Suspension

2002 ◽  
Vol 255 (2) ◽  
pp. 254-259 ◽  
Author(s):  
Miguel G. Neumann ◽  
Fergus Gessner ◽  
Carla C. Schmitt ◽  
Rogerio Sartori
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Aqueous Suspension ◽  
Clay Particle ◽  
Layer Charge ◽  
Cationic Dye

scholarly journals Methylene Blue Adsorption Study on Microcline Particles in the Function of Particle Size Range and Temperature

Minerals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 555 ◽  
Author(s):  
Tímea Pernyeszi ◽  
Roland Farkas ◽  
János Kovács
Keyword(s):  
Methylene Blue ◽  
Particle Size ◽  
Aqueous Suspension ◽  
Dye Adsorption ◽  
X Ray Diffraction ◽  
Particle Size Range ◽  
X Ray ◽  
Adsorption Capacities ◽  
Self Association

In this paper, the adsorption process of methylene blue has been investigated on microcline particles as a function of particle size and temperature. The characterization of microcline in the particle size ranges of 1−71 μm and 71−315 μm gained by sieving was proved using X-ray diffraction (XRD) and scanning electron microscopy combined with energy-dispersive detector (SEM-EDS) in powder form, over laser diffraction measurements in aqueous suspension. The optimum dosage of adsorbent was 13.5 g/L in dye adsorption and the adsorption isotherms on both microcline size fractions were determined at this adsorbent concentration. The maximum adsorption capacities were in the range of 1.5–3.1 mg g−1 on microcline particles with supplementing evaluation of isotherms using the Langmuir model. Considering the problems of linearization of equations, the non-linear least-squares estimation can be strongly recommended for modeling adsorption-equilibrium. The adsorption isotherm determined at elevated temperature of 60−65 °C represents a breakpoint at around 20 mg L−1 of equilibrated dye concentration due to performing of a potential process of dye self-association. According to our experiments, the increase in temperature has an adverse effect on adsorption.

Performance Evaluation of Al2O3 Powder Dispersion by Bead and Ball Mills

2014 ◽  
Vol 682 ◽  
pp. 32-34 ◽  
Author(s):  
N.S. Belousova ◽  
O.A. Goryaynova ◽  
E.V. Melnikova
Keyword(s):  
Particle Size ◽  
Performance Evaluation ◽  
Ball Mill ◽  
Aqueous Suspension ◽  
Ball Mills ◽  
Powder Dispersion ◽  
Maximum Particle Size ◽  
Bead Mill ◽  
Maximum Particle

In this paper the results of alumina aqueous suspension disaggregation with the help of bead and ball mills are shown. The changing of maximum particle size for50 wt. % and 90 wt. % of powder (from lowest to highest size) in suspension dispersed by a bead mill for one hour and ball mill for 48 hours was fixed. In order to achieve powder parameters given by the manufacturer disaggregating process sets was defined.

scholarly journals Study of photocatalytic activity of TiO2 fluorinated by thermal shock method for the degradation of different dyes

2015 ◽  
Vol 18 (2) ◽  
pp. 121-131
Author(s):  
Khoa Tien Le ◽  
Ngoc Chau Hoang ◽  
Tien Thuy Thai ◽  
Anh Trung Le ◽  
Thinh Nguyen Huu Pham ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Thermal Shock ◽  
Photocatalytic Oxidation ◽  
Organic Dyes ◽  
Cationic Dye ◽  
Solution Ph ◽  
Ph Values ◽  
Methylene Blue Cationic Dye

TiO2 P25 was fluorinated by thermal shock method in order to study the influence of thermal shock fluorination on the surface properties and the photocatalytic activity for the degradation of cationic and anionic organic dyes at different pH values. The surface charge of catalysts was characterized by the pHPZC measurement. The photocatalytic activity of catalysts was evaluated via the degradation of methylene blue (cationic dye) and methyl orange (anionic dye). The results showed that the thermal shock fluorination and the rise of solution pH can increase the surface negative charge of TiO2, which enhanced the adsorption of methylene blue and then improved the photocatalytic degradation of this cationic dye under UV and visible light. On the other hand, after the fluorination, the adsorption of methyl orange on TiO2 was strongly reduced, which limited the photocatalytic oxidation of this anion dye.

scholarly journals Probing roto-translational diffusion of small anisotropic colloidal particles with a bright-field microscope

2021 ◽  
Vol 44 (4) ◽  
Author(s):  
Fabio Giavazzi ◽  
Antara Pal ◽  
Roberto Cerbino
Keyword(s):  
Particle Size ◽  
Rotational Motion ◽  
Colloidal Particles ◽  
Aqueous Suspension ◽  
Translational Motion ◽  
Translational Diffusion ◽  
Experimental Demonstration ◽  
Bright Field ◽  
Microscopic Scale ◽  
Bright Field Microscopy

Abstract Soft and biological materials are often composed of elementary constituents exhibiting an incessant roto-translational motion at the microscopic scale. Tracking this motion with a bright-field microscope becomes increasingly challenging when the particle size becomes smaller than the microscope resolution, a case which is frequently encountered. Here we demonstrate squared-gradient differential dynamic microscopy (SG-DDM) as a tool to successfully use bright-field microscopy to extract the roto-translational dynamics of small anisotropic colloidal particles, whose rotational motion cannot be tracked accurately in direct space. We provide analytical justification and experimental demonstration of the method by successful application to an aqueous suspension of peanut-shaped particles. Graphic abstract

scholarly journals Application of Emulsion Liquid Membrane Process for Cationic Dye Extraction

2020 ◽  
Vol 21 (3) ◽  
pp. 39-44
Author(s):  
Manal Adnan Mohammed ◽  
Wasan Omar Noori ◽  
Huda Adil Sabbar
Keyword(s):  
Methylene Blue ◽  
Liquid Membrane ◽  
Agitation Speed ◽  
Blue Dye ◽  
Cationic Dye ◽  
Methylene Blue Dye ◽  
Membrane Process ◽  
Emulsion Liquid Membrane ◽  
H2so4 Concentration ◽  
Dye Extraction

In the present work studies were carried out to extract a cationic dye (Methylene Blue MB) from an aqueous solution using emulsion liquid membrane process (ELM). The organic phase (membrane phase) consists of Span 80 as emulsifier, sulfuric acid solution as stripping agent and hexane as diluent.  In this study, important factors influencing the extraction of methylene blue dye were studied. These factors include H2SO4 concentration in the stripping phase, agitation speed in the dye permeation stage, Initial dye concentration and diluent type.    More than (98%) of Methylene blue dye was extracted at the following conditions: H2SO4 concentration (1.25) M, agitation speed (200) rpm, dye concentration (10) ppm and the diluent type was hexane.

scholarly journals Effect of Particle Size on Skin Permeation and Retention of Piroxicam in Aqueous Suspension

2010 ◽  
Vol 58 (8) ◽  
pp. 1096-1099 ◽  
Author(s):  
Kunikazu Moribe ◽  
Mizuho Shibata ◽  
Takayuki Furuishi ◽  
Kenjirou Higashi ◽  
Kazuo Tomono ◽  
...  
Keyword(s):  
Particle Size ◽  
Skin Permeation ◽  
Aqueous Suspension ◽  
Effect Of Particle Size

scholarly journals Stimulating effect of magnesium hydroxide on aqueous characteristics of iron nanocomposites

2019 ◽  
Vol 80 (10) ◽  
pp. 1996-2002 ◽  
Author(s):  
I. Maamoun ◽  
O. Eljamal ◽  
O. Falyouna ◽  
R. Eljamal ◽  
Y. Sugihara
Keyword(s):  
Particle Size ◽  
Magnesium Hydroxide ◽  
Iron Nanoparticles ◽  
Aqueous Suspension ◽  
Average Particle Size ◽  
Degree Of Crystallinity ◽  
Iron Core ◽  
Average Particle ◽  
Size Estimation ◽  
Aqueous Corrosion

Abstract Nanoscale zero-valent iron (nFe0) tends to aggregate, which dramatically affects its aqueous characteristics and thereby its potential in water treatment applications. Hence, the main aim of this study is to overcome such drawback of nFe0 by a new modification approach. Iron nanoparticles were modified by magnesium hydroxide (Mg(OH)2) addition with different mass ratios in order to form a nanocomposite with superior aqueous characteristics. The optimization process of the iron–magnesium nanocomposite (nFe0-Mg) was conducted through different approaches including settlement tests, morphology and crystallinity investigations and particle size estimation. The addition of Mg(OH)2 to nFe0 with a Mg/Fe coating ratio of 100% resulted in stimulated stability of the particles in aqueous suspension with around 95% enhancement in the suspension efficiency compared to that of nFe0. Results showed that the average particle size and degree of crystallinity of nFe0-Mg(Mg/Fe:100%) decreased by 46.7% and increased by 16.8%, respectively, comparing with that of nFe0. Additionally, the iron core of the synthesized nFe0 was adequately protected from aqueous corrosion with lower iron oxides leachates after the optimal modification with Mg(OH)2. Furthermore, Mg(OH)2 coating resulted in a stimulated adsorption reactivity of the composite towards phosphorus (P) with around 3.13% promotion in the removal efficiency comparing to that of nFe0.

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