Kinetic and equilibrium studies on the batch removal of methylene blue from aqueous solution by using natural magnetic sand

2020 ◽  
Vol 201 ◽  
pp. 393-403
Author(s):  
Cigdem Ozer
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Equilibrium Studies

Characterization and equilibrium studies for the removal of methylene blue from aqueous solution using activated bone char

2020 ◽  
Author(s):  
Edu J. Inam ◽  
John Bassey Edet ◽  
Patrick E. Akpan ◽  
Kufre E. Ite
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Freundlich Isotherm ◽  
Surface Characteristics ◽  
Industrial Applications ◽  
Hydroxyl Groups ◽  
Bone Char ◽  
Equilibrium Studies ◽  
Apatite Phase ◽  
Cow Bone

Abstract The surface characteristics as well as adsorption potential of activated cow bone char for the removal of methylene blue (MB) from aqueous solution were investigated. Physical characteristics of the adsorbent revealed a large surface area, low pore volume, reduced ash and moisture contents, which have been identified as good adsorption characteristics. The surface of the adsorbent was predominated by mesopores with a few microporous structures as well as the presence of carbonates, phosphates, silicates and hydroxyl groups which are characteristic of the apatite phase. Adsorption efficiency for the removal of MB was observed to be influenced by pH, adsorbent dosage as well as initial dye concentrations. Equilibrium adsorption data was best described by the Freundlich isotherm with a good correlation coefficient suggesting multilayer adsorption of the dye molecules on the surface of the adsorbent. Based on the drive for reduced cost, removal efficiency and availability, activated carbon from cow bone could be a promising adsorbent for methylene blue-laden effluent that could be utilized in small and large industrial applications.

Removal of methylene blue from aqueous solution by Artist's Bracket fungi: kinetic and equilibrium studies

2016 ◽  
Vol 73 (11) ◽  
pp. 2832-2840 ◽  
Author(s):  
Daryush Naghipour ◽  
Kamran Taghavi ◽  
Mehrdad Moslemzadeh
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Removal Efficiency ◽  
Dye Adsorption ◽  
Surface Characteristic ◽  
Coefficient Of Determination ◽  
Order Kinetic ◽  
Operational Parameters ◽  
Equilibrium Studies ◽  
Increasing Temperature

In this study, adsorption of methylene blue (MB) dye onto Artist's Bracket (AB) fungi was investigated in aqueous solution. Fourier transform infrared and scanning electron microscopy were used to investigate surface characteristic of AB fungi. Influence of operational parameters such as pH, contact time, biosorbent dosage, dye concentration, inorganic salts and temperature was studied on dye removal efficiency. With the increase of pH from 3 to 9, removal efficiency increased from 74.0% to 90.4%. Also, it reduced from 99.8% to 81.8% with increasing initial MB concentration from 25 mg L−1 to 100 mg L−1, whereas it increased from 54.7% to 98.7% and from 98.5% to 99.9% with increasing biosorbent dosage from 0.5 g L−1 to 2 g L−1 and with increasing temperature from 25 °C to 50 °C, respectively. Isotherm studies have shown adsorption of MB dye over the AB fungi had a better coefficient of determination (R2) of 0.98 for Langmuir isotherm. In addition, the maximum monolayer adsorption capacity (qm) was 100 mg g−1. Also, the MB dye adsorption process followed pseudo-second-order kinetic. In general, AB fungi particles can be favorable for removal of MB dye from dye aqueous solution with natural pH and high temperature.

Novel tannin-based adsorbent in removing cationic dye (Methylene Blue) from aqueous solution. Kinetics and equilibrium studies

2010 ◽  
Vol 174 (1-3) ◽  
pp. 9-16 ◽  
Author(s):  
J. Sánchez-Martín ◽  
M. González-Velasco ◽  
J. Beltrán-Heredia ◽  
J. Gragera-Carvajal ◽  
J. Salguero-Fernández
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Cationic Dye ◽  
Equilibrium Studies ◽  
Solution Kinetics

Using of modified-bentonite as low-cost sorbent for removal of methylene blue dye from aqueous solution

2020 ◽  
Vol 27 (2) ◽  
pp. 45-54
Author(s):  
Saraa Muwafaq Ibrahim ◽  
Ziad T. Abd Ali
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Silanol Group ◽  
Infrared Spectrometry ◽  
Blue Dye ◽  
Ammonium Bromide ◽  
Vibration Band ◽  
Order Kinetic ◽  
Methylene Blue Dye ◽  
Modified Bentonite

Batch experiments have been studied to remove methylene blue dye (MB) from aqueous solution using modified bentonite. The modified bentonite was synthesized by replacing exchangeable calcium cations in natural bentonite with cationic surfactant cetyl trimethyl ammonium bromide (CTAB). The characteristics of modified bentonite were studied using different analysis such as Scanning electronic microscopy (SEM), Fourier transform infrared spectrometry (FTIR) and surface area. Where SEM shows the natural bentonite has a porous structure, a rough and uneven appearance with scattered and different block structure sizes, while the modified bentonite surface morphology was smooth and supplemented by a limited number of holes. On other hand, (FTIR) analysis that proved NH group aliphatic and aromatic group of MB and silanol group are responsible for the sorption of contaminate. The organic matter peaks at 2848 and 2930 cm-1 in the spectra of modified bentonite which are sharper than those of the natural bentonite were assigned to the CH2 scissor vibration band and the symmetrical CH3 stretching absorption band, respectively, also the 2930 cm-1 peak is assigned to CH stretching band. The batch study was provided the maximum removal efficiency (99.99 % MB) with a sorption capacity of 129.87 mg/g at specified conditions (100 mg/L, 25℃, pH 11 and 250rpm). The sorption isotherm data fitted well with the Freundlich isotherm model. The kinetic studies were revealed that the sorption follows a pseudo-second-order kinetic model which indicates chemisorption between sorbent and sorbate molecules.

KINETICS AND EQUILIBRIUM STUDIES ON THE ABSTRACTION NICKEL FROM AQUEOUS SOLUTION USING CHEMICALLY TREATED COW HOOF

2017 ◽  
Vol 73 (3) ◽  
Author(s):  
Osasona Ilesanmi ◽  
Adebayo Albert Ojo ◽  
Okronkwo Elvis Afemafuna ◽  
Johnson Jonathan ◽  
Osunlana Oluronke
Keyword(s):  
Aqueous Solution ◽  
Equilibrium Studies ◽  
Chemically Treated

Pattern Formation in the Methylene Blue-Fructose-Oxygen System in Aqueous Solution and in Gel Systems

2000 ◽  
Vol 65 (9) ◽  
pp. 1394-1402 ◽  
Author(s):  
Ľubica Adamčíková ◽  
Mária Hupková ◽  
Peter Ševčík
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Pattern Formation ◽  
Alkaline Ph ◽  
Initial Reactant ◽  
Nonlinear Reaction ◽  
Oxygen System ◽  
Hydrodynamic Processes ◽  
Liquid Layer Thickness ◽  
Catalyzed Oxidation

Spatial patterns in methylene blue-catalyzed oxidation of fructose at alkaline pH were found in aqueous solution and in gel systems. In a thin liquid layer (thickness >2.4 mm) a mixture of spots and stripes was formed by interaction of a nonlinear reaction and the Rayleigh or Maragoni instabilities. The pattern formation was affected by initial reactant concentrations and by the thickness of the reaction mixture layer. Long-lasting structures were formed in gel systems (polyacrylamide, agar, gelatin). These patterns also arise primarily from hydrodynamic processes.

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