FAST REMOVAL OF MALACHITE GREEN FROM AQUEOUS SOLUTIONS USING HIGHLY HYDROPHOBIC WATER.DISPERSIBLE MAGNETIC NANOCOMPOSITE

2019 ◽  
Vol 19 (7) ◽  
pp. 1079-1095
Author(s):  
Mohsen Nekoeinia ◽  
Akram Khodadeh-Tehrani ◽  
Omran Moradlou ◽  
Abolfazl Semnani ◽  
Majid Kolahdoozan ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Malachite Green ◽  
Magnetic Nanocomposite ◽  
Highly Hydrophobic ◽  
Fast Removal

scholarly journals Effective Removal of Malachite Green from Aqueous Solutions Using Magnetic Nanocomposite: Synthesis, Characterization, and Equilibrium Study

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Ali Q. Alorabi
Keyword(s):  
Surface Area ◽  
Malachite Green ◽  
Chemical Activation ◽  
Aqueous Media ◽  
Kinetic Studies ◽  
Cost Effective ◽  
Magnetic Nanocomposite ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Order Kinetic

In this work, magnetized activated Juniperus procera leaves (Fe3O4@AJPL) were successfully prepared via chemical activation of JPL and in situ coprecipitation with Fe3O4. A Fe3O4@AJPL nanocomposite was successfully applied for the elimination of malachite green (MG) dye from aqueous media. The prepared Fe3O4@AJPL adsorbent was characterized by SEM, EDX, TEM, XRD, FTIR, TGA, and BET surface area analyses. The BET surface area and pore size of the Fe3O4@AJPL nanocomposite were found to be 38.44 m2/g and 10.6 nm, respectively. The XRD and FTIR results indicated the formation of a Fe3O4@AJPL nanocomposite. Different parameters, such as pH of the solution (3–8), adsorbent dosage (10–100 mg), temperature (25–45°C), contact time (5-240 min), and initial MG concentrations (20–350 mg/L), for the elimination of the MG dye using Fe3O4@AJPL were optimized and found to be 7, 50 mg, 45°C, 120 min, and 150 mg/L, respectively. The nonlinear isotherm and kinetic studies exhibited a better fitting to second-order kinetic and Langmuir isotherm models, with a maximum monolayer adsorption capacity of 318.3 mg/g at 45°C, which was highly superior to the previously reported magnetic nanocomposite adsorbents. EDX analyses confirmed the presence of nitrogen on the Fe3O4@AJPL surface after MG adsorption. The calculated thermodynamic factors indicated endothermic and spontaneous processes. The desorption of MG dye from Fe3O4@AJPL was performed using a solution of 90% ethanol. Finally, it could be concluded that the designed Fe3O4@AJPL magnetic nanocomposite will be a cost-effective and promising adsorbent for the elimination of MG from aqueous media.

Application of fly ash for adsorptive removal of malachite green from aqueous solutions

2013 ◽  
Vol 53 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Shikha Dubey ◽  
Lavanchawee Sujarittanonta ◽  
Yogesh Chandra Sharma
Keyword(s):  
Fly Ash ◽  
Aqueous Solutions ◽  
Malachite Green ◽  
Adsorptive Removal
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