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 Biosorption of Cationic Dyes onto Cork Stopper Particles

2019 ◽  
Vol 26 (3) ◽  
pp. 25-38
Author(s):  
Israa A. Al.Joboury ◽  
Shahlaa E. Ebrahime
Keyword(s):  
Experimental Data ◽  
Low Cost ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Isotherm Model ◽  
Cork Stopper ◽  
Langmuir Isotherm Model ◽  
Pseudo Second Order ◽  
Simulated Wastewater ◽  
Maximum Removal

In this study, cork stopper particles were used as a low cost biosorbent to remove the cationic dyes (Methylene blue (MB), Malachite green (MG), and Methyl violet (MV)) from simulated wastewater. Batch sorption experiments of components were conducted as a function of pH, sorbent dosages, contact time, agitation speed, and particle size to optimize the best conditions for maximum removal efficiencies of dyes. The experimental data fitted slightly best to the Langmuir isotherm model than to Freundlich and Temkin isotherm model. The experimental data proved that the adsorption kinetic of MB, MG, and MV could be described by a pseudo-second order model. The results indicate that cork adsorbs dyes efficiently and could be employed as a low-cost alternative in wastewater treatment for the removal of cationic dyes.

scholarly journals Super and Selective Adsorption of Cationic Dyes onto Carboxylate-Modified Passion Fruit Peel Biosorbent

2021 ◽  
Vol 9 ◽  
Author(s):  
Kaiwei Chen ◽  
Linlin Du ◽  
Peng Gao ◽  
Junli Zheng ◽  
Yuanli Liu ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Selective Adsorption ◽  
Low Cost ◽  
Methyl Violet ◽  
Passion Fruit ◽  
Cationic Dyes ◽  
Polluted Water ◽  
Isotherm Models ◽  
Fruit Peel ◽  
Environmental Friendliness

The carboxylate-functionalized passion fruit peel (PFPCS) was an efficient and rapid biosorbent for wastewater treatment. The PFPCS exhibited excellent selectivity to the cationic dyes, where the maximum adsorption capacities for methylene blue (MB) and methyl violet (MV) were 1,775.76 mg g−1 and 3,756.33 mg g−1, respectively. And the adsorption process of MB and MV on PFPCS reached equilibrium within 20 min. Moreover, the adsorption conditions and mechanisms were investigated. The adsorption process was in good agreement with the pseudo-second-order and Langmuir isotherm models. The adsorption mechanism was also proposed to be electrostatic interaction and hydrogen bond. After six cycles of desorption-adsorption, the removal efficient of MB and MV could be kept above 95%. Thus, PFPCS was considered as a highly efficient absorbent for removing cationic dyes from polluted water due to excellent adsorption characteristics, low cost and environmental friendliness.

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

Treatment of Cationic Dye Wastewater with Hybrid Sorbent Generated by Anionic Dye Wastewater Hybridization with Calcium Fluoride

2013 ◽  
Vol 652-654 ◽  
pp. 1571-1579
Author(s):  
Dan Hua Zhao ◽  
Xiu Lian Zhang ◽  
Wei Yin ◽  
Xiao Jun Liu
Keyword(s):  
Ionic Strength ◽  
Calcium Fluoride ◽  
Low Cost ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Maximum Adsorption Capacity ◽  
Cationic Dye ◽  
Dye Wastewater ◽  
Anionic Dye ◽  
Hybrid Sorbent

CaF2/AG25 (CFA) hybrid sorbent formed by hybrid reaction with activated calcium fluoride of low cost and anionic dye wastewater-Acid Green 25 (AG25) was used for the treatment of cationic dye wastewater. The adsorption of two cationic dyes methyl violet (MV) and Neutral Red (NR) from aqueous solutions was examined using a batch sorption technique. The effects of time, pH, ionic strength and temperature on the adsorption were also examined. It exhibited a faster adsorption to cationic dyes and hardly affected in pH over 3.5, ionic strength low 0.04 mol/L and temperature between 20 oC and 60 oC. The adsorption behavior of the NR and MV on CFA is in good agreement with the Langmiur isotherms model with the correlation coefficients of R 0.9948 for NR and 0.9992 for MV and the maximum adsorption capacity of NR (39.22 mg/g) and MV (48.78 mg/g). Finally, this sorbent was used in treatment of two practical cationic dye wastewaters with satisfactory results.

Kinetic and Equilibrium of Biosorption of Methylene Blue by Sunflower Straw

2012 ◽  
Vol 610-613 ◽  
pp. 194-197
Author(s):  
Li Ping Chen ◽  
Si Qin Dalai
Keyword(s):  
Methylene Blue ◽  
Ph Value ◽  
Low Cost ◽  
Order Equation ◽  
Solution Ph ◽  
Biosorption Process ◽  
Optimum Ph ◽  
Pseudo Second Order ◽  
Batch Biosorption ◽  
Sunflower Straw

With sunflower straw as low-cost biosorbent, the biosorption of methylene blue (MB) from aqueous solution was studied by batch biosorption technique. The biosorption experiments were carried out under different conditions of solution pH, sunflower straw dose, and temperature. The results showed that biosorption of MB on to sunflower straw affected remarkably by the pH value, and the maximum biosorption amount was achieved at an optimum pH of 12.0; the equilibrium biosorption amount decreased as temperature was increasing, and the biosorption process might be depicted primly by Langmuir function; It was shown that the biosorption of methylene blue could be described by the pseudo-second-order equation.

scholarly journals Equilibrium, Kinetic, and Thermodynamic Studies of Cationic Dyes Adsorption on Corn Stalks Modified by Citric Acid

2021 ◽  
Vol 5 (4) ◽  
pp. 52
Author(s):  
Liudmyla Soldatkina ◽  
Marianna Yanar
Keyword(s):  
Methylene Blue ◽  
Citric Acid ◽  
Adsorption Capacity ◽  
Malachite Green ◽  
Low Cost ◽  
Cationic Dyes ◽  
Thermodynamic Studies ◽  
Negative Results ◽  
Endothermic Process ◽  
Dyes Adsorption

The modification of agricultural wastes and their use as low-cost and efficient adsorbents is a prospective pathway that helps diminish waste and decrease environmental problems. In the present research, the natural adsorption capacity of corn stalks (CS) was improved by modification of their surface with citric acid. The adsorption capacity of the modified corn stalks (CS-C) was determined with the help of cationic dyes (methylene blue and malachite green). The equilibrium, kinetics, and thermodynamics of the cationic dyes on CS-C were studied. The Langmuir isotherm model best fitted the data both for methylene blue and malachite green adsorption on CS-C. The adsorption kinetics of the cationic dyes was well described by the pseudo-second order model. Thermodynamic studies revealed that adsorption of the cationic dyes on CS-C was an endothermic process. Negative results of ΔGo (between −31.8 and −26.3 kJ mol−1) indicated that the adsorption process was spontaneous in all the tested temperatures. The present study verified that citric acid-modified corn stalks can be used as a low-cost and effective adsorbent for removal of cationic dyes from aqueous solutions.

REMOVAL OF CATIONIC DYES FROM AQUEOUS SOLUTION USING CARBON-ENCAPSULATED SUPERPARAMAGNETIC COLLOIDAL NANOPARTICLES AS ADSORBENT

NANO ◽  
2013 ◽  
Vol 08 (01) ◽  
pp. 1350006 ◽  
Author(s):  
HUI WANG ◽  
XUHUI ZHOU ◽  
QIANWANG CHEN
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Rhodamine B ◽  
Negative Charge ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Colloidal Nanoparticles ◽  
Ph Values

This paper demonstrates the application of negative charge-functionalized carbon-encapsulated superparamagnetic colloidal nanoparticles being as nanoadsorbents for the removal of cationic dyes from aqueous solutions. Adsorption characteristics of the magnetic nanoadsorbents were examined using methylene blue as adsorbates, exhibiting excellent ability to remove cationic dyes from aqueous solutions. In addition, the influences of uptake time, concentration of nanoadsorbents and pH values of aqueous solution on the removal of cationic dyes have been discussed. Results show that the removal efficiency can be up to 90% at a dye concentration of 100 mg L-1 when the uptake time is 1 min, which indicates rapidly removal ability of the magnetic nanoadsorbents. Furthermore, other cationic dyes including rhodamine B and methyl violet were used to examine the universality of nanoadsorbents.

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.

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