Removal of Methylene Blue and Malachite Green Dye Using Different Form of Coconut Fibre as Absorbent

2013 ◽  
Author(s):  
Wong
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Malachite Green Dye ◽  
Coconut Fibre

scholarly journals ADSORPTION STUDIES OF BASIC DYES ONTO TEAK (TECTONA GRANDIS) LEAF POWDER

2016 ◽  
Vol 9 (2) ◽  
pp. 102-108
Author(s):  
Yash Mishra ◽  
V. Sowmya ◽  
S. Shanthakumar
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Tectona Grandis ◽  
Dye Molecules ◽  
Operational Parameters ◽  
Malachite Green Dye ◽  
Equilibrium Data ◽  
Leaf Powder ◽  
Good Potential

In this study, the adsorption potential of Teak (Tectona grandis) leaf powder (TLP) to remove Methylene blue (MB) and Malachite Green (MG) dye molecules from aqueous solution was investigated. Batch experiments were conducted to evaluate the influence of operational parameters such as, pH (2-9), adsorbent dosage (1-7 g/L), contact time (15-150 minutes) and initial dye concentration (20-120 mg/L) at stirring speed of 150 rpm, on the adsorption of MB and MG on TLP. The maximum removal efficiency of 98.4% and 95.1% was achieved for MB and MG dye, respectively. The experimental equilibrium data were analyzed using Langmuir, Freundlich and Temkin isotherms and it was found that it fitted well to the Freundlich Isotherm model. The surface structure and morphology of the adsorbent was characterized using Scanning electron microscopy (SEM) and the presence of functional groups and its interaction with the dye molecules were analyzed using Fourier transform infrared (FTIR). Based on the investigation, it has been demonstrated that the teak leaf powder has good potential for effective adsorption of Methylene blue and Malachite green dye.

scholarly journals ADSORPTION STUDIES OF BASIC DYES ONTO TEAK (TECTONA GRANDIS) LEAF POWDER

2016 ◽  
Vol 9 (2) ◽  
pp. 102-108 ◽  
Author(s):  
Yash Mishra ◽  
V. Sowmya ◽  
S. Shanthakumar
Keyword(s):  
Methylene Blue ◽  
Malachite Green ◽  
Freundlich Isotherm ◽  
Tectona Grandis ◽  
Dye Molecules ◽  
Operational Parameters ◽  
Malachite Green Dye ◽  
Equilibrium Data ◽  
Leaf Powder ◽  
Good Potential

In this study, the adsorption potential of Teak (Tectona grandis) leaf powder (TLP) to remove Methylene blue (MB) and Malachite Green (MG) dye molecules from aqueous solution was investigated. Batch experiments were conducted to evaluate the influence of operational parameters such as, pH (2-9), adsorbent dosage (1-7 g/L), contact time (15-150 minutes) and initial dye concentration (20-120 mg/L) at stirring speed of 150 rpm, on the adsorption of MB and MG on TLP. The maximum removal efficiency of 98.4% and 95.1% was achieved for MB and MG dye, respectively. The experimental equilibrium data were analyzed using Langmuir, Freundlich and Temkin isotherms and it was found that it fitted well to the Freundlich Isotherm model. The surface structure and morphology of the adsorbent was characterized using Scanning electron microscopy (SEM) and the presence of functional groups and its interaction with the dye molecules were analyzed using Fourier transform infrared (FTIR). Based on the investigation, it has been demonstrated that the teak leaf powder has good potential for effective adsorption of Methylene blue and Malachite green dye.

Photo-catalytic Study of Malachite Green Dye Degradation Using Rice Straw Extracted Activated Carbon Supported ZnO Nano-particles

2020 ◽  
Vol 10 (6) ◽  
pp. 849-859
Author(s):  
Radwa A. El-Salamony ◽  
Abeer A. Emam ◽  
Nagwa A. Badawy ◽  
Sara F. El-Morsi
Keyword(s):  
Activated Carbon ◽  
Visible Light ◽  
Rice Straw ◽  
Malachite Green ◽  
Dye Degradation ◽  
Nano Particles ◽  
Oh Radicals ◽  
Impregnation Method ◽  
Photo Degradation ◽  
Malachite Green Dye

Objective: ZnO nanoparticles were synthesized using wet impregnation method, and activated carbon from rice straw (RS) prepared through chemical route. Methods: The nano-composites ZnO-AC series were prepared with different ZnO:AC ratio of 10, 20, 50, and 70% to optimize the zinc oxide nanoparticles used. The obtained composites were characterized by FE-SEM, XRD, SBET, and optical techniques then used for the photo-degradation of Malachite green dye (MG) under visible light. Results: It was found that 10ZnO-AC exhibited excellent visible light photo-catalytic performance. The ·OH radicals’ formation is matching with photo-activity of the prepared composites. The photo-degradation efficiency of MG increased from 63% to 93%, when the 10ZnO-AC photocatalyst amount was increased from 0.5 to 6 g/L. Conclusion: The GC-MS technique was used to analyze the intermediates formed; up to 15 kinds of chemicals were identified as the degradation products.

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