scholarly journals Synthesis of Activated Carbon/Chitosan/Alginate Beads Powder as an Adsorbent for Methylene Blue and Methyl Violet 2B Dyes

2020 ◽  
Vol 20 (5) ◽  
pp. 1119
Author(s):  
Margaretha Aditya Kurnia Purnaningtyas ◽  
Sri Sudiono ◽  
Dwi Siswanta
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Methyl Violet ◽  
Freundlich Isotherm ◽  
Alginate Beads ◽  
Cationic Dyes ◽  
Adsorption Mechanisms ◽  
Methyl Violet 2B ◽  
Desorption Study ◽  
Kinetics And Isotherms

The activated carbon-chitosan-alginate (KKA) beads powder was synthesized to form an adsorbent for the cationic dyes, methylene blue (MB) and methyl violet 2B (MV 2B). The aims of this research were to determine the optimum composition of KKA beads powder for the adsorption of cationic dyes and to investigate the effect of pH, adsorbent mass, contact time, and initial concentration of MB and MV 2B dyes. A desorption study was also implemented to predict the adsorption mechanisms of MB and MV 2B dyes. The KKA beads powder was prepared by mixing chitosan, Na-alginate with various variation of masses (0.6; 0.8; 1.0; and 1.2 g) and activated carbon. The KKA beads were immersed in a CaCl2 solution. The KKA beads powder was characterized using FTIR spectroscopy and SEM. The desorption study was conducted in NaCl (0.1 M and 1.0 M), ethanol (40% and 60%), and pH 4 solution. The result showed that the KKA beads powder had been successfully created, with maximum adsorption capacities of 1.34 mmol g–1 for MB and 1.23 mmol g–1 for MV 2B. The kinetics and isotherms of MB and MV dyes adsorption on the KKA beads powder followed pseudo second order kinetics model and Freundlich isotherm. The desorption study showed that 60% ethanol was the most effective desorption solution for cationic dyes.

Kinetics and Isotherms Studies of methylene blue Basic Dye from Aqueous Solution onto Selenicereus grandiflorus Activated Carbon

2019 ◽  
Vol 4 (1-2) ◽  
pp. 1-6
Author(s):  
M. Mahadeva Swamy ◽  
B.M. Nagabhushana ◽  
Nagaraju Kottam
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Point Of Zero Charge ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Batch Mode ◽  
Adsorption Studies ◽  
Kinetics And Isotherms ◽  
Adsorbent Dose

The present experiment explains the effectiveness of adsorption studies of methylene blue dye from aqueous solutions on activated carbon from Selenicereus grandiflorus (SG) treated with conc. sulfuric acid. The sulphuric acid-treated Selenicereus grandiflorus activated carbon (SGAC) was used as low-cost adsorbent for the removal of methylene blue dye from aqueous solution. It suggests an ideal alternative method to adsorption of dye compared to other expensive treatment options. The adsorption studies have been conducted at different experimental parameters, i.e., pH, contact time, adsorbent dose and initial dye concentration. The batch mode experiments were conducted by different adsorbent dose (0.03-0.150 g per 50 mL), pH of the solution (2-12), effect of time (3-18 min), initial dye concentration (10 mg/L), point of zero charge and regeneration of spent adsorbent studies. Langmuir model shows better fit to the equilibrium data (R2 = 0.966) than Freundlich model. The adsorption capacity (Qm) of SGAC increases with increasing dosage where Qm is 16.17 mg g-1.

A comparative study of the adsorption efficiency of typical adsorption materials for wastewater containing cesium

2020 ◽  
Author(s):  
Can Du ◽  
Jinsheng Wang ◽  
Xin Liu ◽  
Juanting Niu
Keyword(s):  
Activated Carbon ◽  
Adsorption Efficiency ◽  
Practical Application ◽  
Adsorption Time ◽  
Initial Concentration ◽  
Adsorption Mechanisms ◽  
Radioactive Wastewater ◽  
Alkaline Environments ◽  
Kinetics And Isotherms ◽  
Cs Ions

<p>In this paper, six typical adsorption materials (activated carbon, kaolin, montmorillonite, bentonite, zeolite, and attapulgite) were used to investigate the effects of adsorption time, initial concentration, pH, and temperature on the adsorption of cesium (Cs) contained in wastewater. A combination of kinetics and isotherms was used. The results revealed that, for the same adsorption time, the adsorption efficiencies of the six materials for Cs were as follows: zeolite>attapulgite>bentonite>montmorillonite>activated carbon>kaolin. The adsorption rate of zeolite to Cs ions was almost independent of the initial concentration and temperature. The removal effect of other materials improved in alkaline environments at 30℃. Attapulgite, montmorillonite, activated carbon, and kaolin could be used for the removal of Cs at low initial concentrations. The adsorptive processes utilized by the six adsorption materials were the result of a combination of various adsorption mechanisms. Among the six typical adsorption materials, zeolite, attapulgite, and bentonite had clear removal effects and could be used in practical application in which radioactive wastewater containing Cs needs to be disposed of. Our results suggest that zeolite is the best adsorption material for this purpose.</p>

Artocarpus odoratissimusskin as a potential low-cost biosorbent for the removal of methylene blue and methyl violet 2B

2013 ◽  
pp. 1-12 ◽  
Author(s):  
Linda B.L. Lim ◽  
Namal Priyantha ◽  
Chieng Hei Ing ◽  
Muhd Khairud Dahri ◽  
D.T.B. Tennakoon ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Low Cost ◽  
Methyl Violet ◽  
Methyl Violet 2B

Activated carbon-alginate beads impregnated with surfactant as sustainable adsorbent for efficient removal of methylene blue

2021 ◽  
Vol 176 ◽  
pp. 233-243
Author(s):  
Noor Ul Alamin ◽  
Amir Sada Khan ◽  
Asma Nasrullah ◽  
Jibran Iqbal ◽  
Zahoor Ullah ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Alginate Beads ◽  
Efficient Removal

Preparation of Activated Carbon from Sugarcane Bagasse Waste for the Adsorption Equilibrium and Kinetics of Basic Dye

2017 ◽  
Vol 751 ◽  
pp. 671-676 ◽  
Author(s):  
Tawan Chaiwon ◽  
Panatda Jannoey ◽  
Duangdao Channei
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Sugarcane Bagasse ◽  
Chemical Activation ◽  
Dye Adsorption ◽  
Freundlich Isotherm ◽  
High Specific Surface Area ◽  
Methylene Blue Adsorption ◽  
Cooperative Adsorption ◽  
Bagasse Waste

This research aimed to study the preparation of activated carbon from sugarcane bagasse waste. The sugarcane bagasse adsorbent was prepared by calcination at 600°C for 2 hours with the use of sulfuric acid (H2SO4) as a chemical activation. The adsorption surface possessed high specific surface area (838 m2/g) with mesoporous diameter. Factors explaining adsorption including adsorption isotherm, adsorption kinetic and adsorption mechanism were constructed from methylene blue adsorption experiments. It was found that the equilibrium data was best represented by Freundlich isotherm, showing multilayer coverage of dye molecules at the outer surface of adsorbent with a cooperative adsorption (physisorption and chemisorption). The kinetic of methylene blue adsorption was found to follow pseudo-second-order rate kinetic model, with a good correlation coefficient. This indicated that the overall rate of the dye adsorption process was controlled by the chemisorption process.

scholarly journals Biosorption of Cationic Dyes onto Cork Stopper Particles by Inverse Fluidized Bed

2019 ◽  
Vol 26 (4) ◽  
pp. 9-16
Author(s):  
Israa A. Al.Joboury ◽  
Shahlaa E. Ebrahime
Keyword(s):  
Methylene Blue ◽  
Fluidized Bed ◽  
Low Cost ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Cork Stopper ◽  
Continuous Mode ◽  
Biosorption Process ◽  
Simulated Wastewater ◽  
Inverse Fluidized Bed

In this study cork stopper particles was used as a low cost biosorbent to remove the cationic dyes (Methylene blue (MB), Malachite green (MG), and Methyl violet (MV)) from simulated wastewater. Continuous experiments were studied in a laboratory scale in inverse fluidized-bed packed with cork stopper particles for removal these dyes. A set of continuous mode experiments was carried out in inverse fluidized bed column to study the effect of flow rate (10, 15, 20 l/h), bed depth (5, 10, 15 cm), and influent concentration (10, 20, 30 mg/l) on the performance of biosorption process onto cork stopper particles. The minimum inverse fluidized velocity was calculated and it was found to be 8 ×10-5 m/s. The results indicate that cork adsorbs dyes efficiently and can be used as a low-cost alternative for the removal of cationic dyes in wastewater treatment.

scholarly journals EQUILIBRIUM, KINETIC AND THERMODYNAMIC STUDIES OF ADSORPTION OF METHYLENE BLUE ON ACTIVATED CARBON FROM COCOA POD SHELLS

2021 ◽  
Vol 9 (11) ◽  
pp. 62-72
Author(s):  
Akissi Lydie Chantal Koffi ◽  
◽  
Djamatche Paul Valery Akesse ◽  
Herman Yapi Yapo ◽  
David Leonce Kouadio ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Freundlich Isotherm ◽  
Entropy Change ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Physiochemical Parameters ◽  
Batch Tests ◽  
Pseudo Second Order

The aim of this research is to investigate the feasibility of using activated carbon from cocoa pod shells, waste from agriculture to adsorb methylene blue from aqueous solutions through batch tests. Various physiochemical parameters such as, contact time, initial dye concentration, adsorbent dosage, pH of dye solution and temperature were investigated in a batch-adsorption technique. The process followed the pseudo-second order kinetics model which showed chemical adsorption. Langmuir and Freundlich isotherm models were used to determine adsorption constants. The maximum adsorption capacity at 30°C is 526.31 mg/g. Thermodynamic parameters such as enthalpy change (∆Hº), free energy change (∆Gº) and entropy change (∆Sº) were studied, and the adsorption process of BM was found to be exothermic and spontaneous.

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