Evaluation of the efficiency of magnetized clinoptilolite zeolite with Fe3O4 nanoparticles on the removal of basic violet 16 (BV16) dye from aqueous solutions

2021 ◽  
pp. 1-10
Author(s):  
Afsaneh Peyghami ◽  
Amir Moharrami ◽  
Yousef Rashtbari ◽  
Shirin Afshin ◽  
Mehdi Vosuoghi ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Fe3o4 Nanoparticles ◽  
Clinoptilolite Zeolite

Adsorption of Pb(II) from aqueous solutions by montmorillonite/Fe3O4 nanoparticles: batch and column studies

2021 ◽  
Vol 226 ◽  
pp. 251-262
Author(s):  
Mohammad Hadi Mehdinejad ◽  
Farshad Hamidi ◽  
Yones Katoki ◽  
Yousef Dadban Shahamat ◽  
Ali Parvizimehr ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Fe3o4 Nanoparticles ◽  
Column Studies

scholarly journals Adsorption of Crystal Violet Dye Using Activated Carbon of Lemon Wood and Activated Carbon/Fe3O4 Magnetic Nanocomposite from Aqueous Solutions: A Kinetic, Equilibrium and Thermodynamic Study

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2241
Author(s):  
Rauf Foroutan ◽  
Seyed Jamaleddin Peighambardoust ◽  
Seyed Hadi Peighambardoust ◽  
Mirian Pateiro ◽  
Jose M. Lorenzo
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Crystal Violet ◽  
Fe3o4 Nanoparticles ◽  
Adsorption Process ◽  
Dye Adsorption ◽  
Magnetic Nanocomposite ◽  
Maximum Adsorption Capacity ◽  
Adsorption Enthalpy

Activated carbon prepared from lemon (Citrus limon) wood (ACL) and ACL/Fe3O4 magnetic nanocomposite were effectively used to remove the cationic dye of crystal violet (CV) from aqueous solutions. The results showed that Fe3O4 nanoparticles were successfully placed in the structure of ACL and the produced nanocomposites showed superior magnetic properties. It was found that pH was the most effective parameter in the CV dye adsorption and pH of 9 gave the maximum adsorption efficiency of 93.5% and 98.3% for ACL and ACL/Fe3O4, respectively. The Dubinin–Radushkevich (D-R) and Langmuir models were selected to investigate the CV dye adsorption equilibrium behavior for ACL and ACL/Fe3O4, respectively. A maximum adsorption capacity of 23.6 and 35.3 mg/g was obtained for ACL and ACL/Fe3O4, respectively indicating superior adsorption capacity of Fe3O4 nanoparticles. The kinetic data of the adsorption process followed the pseudo-second order (PSO) kinetic model, indicating that chemical mechanisms may have an effect on the CV dye adsorption. The negative values obtained for Gibb’s free energy parameter (−20 < ΔG < 0 kJ/mol) showed that the adsorption process using both types of the adsorbents was physical. Moreover, the CV dye adsorption enthalpy (ΔH) values of −45.4 for ACL and −56.9 kJ/mol for ACL/Fe3O4 were obtained indicating that the adsorption process was exothermic. Overall, ACL and ACL/Fe3O4 magnetic nanocomposites provide a novel and effective type of adsorbents to remove CV dye from the aqueous solutions.

Aminated-Fe3O4 nanoparticles filled chitosan/PVA/PES dual layers nanofibrous membrane for the removal of Cr(VI) and Pb(II) ions from aqueous solutions in adsorption and membrane processes

2018 ◽  
Vol 337 ◽  
pp. 169-182 ◽  
Author(s):  
Shahnaz Koushkbaghi ◽  
Amirabbas Zakialamdari ◽  
Mohammad Pishnamazi ◽  
Hossein Fasih Ramandi ◽  
Majid Aliabadi ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Fe3o4 Nanoparticles ◽  
Nanofibrous Membrane ◽  
Membrane Processes

Magnetic Fe3O4 nanoparticles for adsorptive removal of acid dye (new coccine) from aqueous solutions

2010 ◽  
Vol 62 (4) ◽  
pp. 844-851 ◽  
Author(s):  
Chih-Huang Weng ◽  
Yao-Tung Lin ◽  
Chia-Ling Yeh ◽  
Y. C. Sharma
Keyword(s):  
Ionic Strength ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Fe3o4 Nanoparticles ◽  
Average Particle Size ◽  
Precipitation Method ◽  
Maximum Adsorption Capacity ◽  
Average Particle ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4

The ability of magnetic Fe3O4 nanoparticles (MFN) to remove new coccine (NC), an acidic dye, from aqueous solutions was studied. Parameters including ionic strength, pH, and temperature were evaluated. MFN, prepared by precipitation method, exhibits an average particle size of 12.5 nm, specific surface area of 85.5 m2/g, and pHzpc of 5.9. Results of kinetic adsorption experiments indicated that the pseudo-second-order rate of adsorption increased with increasing initial NC concentration. Findings also revealed that the equilibrium data could be fitted into Langmuir adsorption isotherm. The adsorption is favored at low pH, high temperature, and low ionic strength, whereupon a maximum adsorption capacity of 1.11 × 10−4 mol/g was determined for NC. Thermodynamic functions indicated that the adsorption process is spontaneous and exothermic in nature. Tests of regeneration showed that after 5 regeneration cycles the adsorption capacity of NC decreased to 35% to its original capacity.

scholarly journals Adsorption of Cr(VI) by Natural Clinoptilolite Zeolite from Aqueous Solutions: Isotherms and Kinetics

2017 ◽  
Vol 19 (3) ◽  
pp. 106-114 ◽  
Author(s):  
Sahand Jorfi ◽  
Mohammad Javad Ahmadi ◽  
Sudabeh Pourfadakari ◽  
Nematollah Jaafarzadeh ◽  
Reza Darvishi Cheshmeh Soltani ◽  
...  
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Contact Time ◽  
Chromium Concentration ◽  
Order Kinetic ◽  
Operational Parameters ◽  
Simple Modification ◽  
Adsorbent Dosage ◽  
Clinoptilolite Zeolite ◽  
Natural Clinoptilolite

Abstract The main aim of this study was to evaluate the efficiency of natural zeolite for Cr(VI) removal from aqueous solutions. Following simple modification of adsorbent, the effect of operational parameters including pH (2–10), adsorbent dosage (2–20 g/L), contact time (5–150 min) and Cr(VI) concentration (10–50 mg/L) were studied according to one-factor-at-a-time procedure. The maximum Cr(VI) removal of 99.53% was obtained at initial pH of 2, contact time of 30 min, adsorbent dosage of 8 g/L and initial chromium concentration of 10 mg/L. The Freundlich isotherm was best fitted with experimental data (R2 = 0.951). Also, type 1pseudo second order kinetic model showed the most correlation (R2 = 1) with the experimental data. According to obtained results, it can be concluded that the application of clay-like adsorbents such as natural clinoptilolite zeolite can be considered as an efficient alternative for final treatment of effluents containing Cr(VI).

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