Mesoporous magnetic biochar composite for enhanced adsorption of malachite green dye: Characterization, adsorption kinetics, thermodynamics and isotherms

2020 ◽  
Vol 31 (3) ◽  
pp. 1253-1263 ◽  
Author(s):  
A.S. Eltaweil ◽  
H. Ali Mohamed ◽  
Eman M. Abd El-Monaem ◽  
G.M. El-Subruiti
Keyword(s):  
Malachite Green ◽  
Adsorption Kinetics ◽  
Magnetic Biochar ◽  
Malachite Green Dye ◽  
Enhanced Adsorption

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.

Effective removal of malachite green dye from aqueous solution in hybrid system utilizing agricultural waste as particle electrodes

Chemosphere ◽  
2021 ◽  
Vol 273 ◽  
pp. 129634
Author(s):  
A. Annam Renita ◽  
Kilaru Harsha Vardhan ◽  
P. Senthil Kumar ◽  
P. Tsopbou Ngueagni ◽  
A. Abilarasu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Malachite Green ◽  
Hybrid System ◽  
Agricultural Waste ◽  
Malachite Green Dye ◽  
Effective Removal
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