Powder activated carbon/Fe3O4 hybrid composite as a highly efficient heterogeneous catalyst for Fenton oxidation of tetracycline: degradation mechanism and kinetic

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 84718-84728 ◽  
Author(s):  
Nemat Jaafarzadeh ◽  
Babak Kakavandi ◽  
Afshin Takdastan ◽  
Roshanak Rezaei Kalantary ◽  
Minoo Azizi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Magnetic Nanoparticles ◽  
Activate Carbon ◽  
Heterogeneous Catalyst ◽  
Degradation Mechanism ◽  
Tetracycline Degradation ◽  
Powder Activated Carbon ◽  
Powder Activate Carbon ◽  
Efficient Heterogeneous Catalyst

In this work, we prepared and used a composite of powder activate carbon/Fe3O4 magnetic nanoparticles (PAC/Fe3O4 MNPs) as a heterogeneous catalyst to remove tetracycline (TC) from aqueous solution.

Optimizing Cu(II) removal from aqueous solution by magnetic nanoparticles immobilized on activated carbon using Taguchi method

2016 ◽  
Vol 74 (1) ◽  
pp. 38-47 ◽  
Author(s):  
Mohammad Javad Ebrahimi Zarandi ◽  
Mahmoud Reza Sohrabi ◽  
Morteza Khosravi ◽  
Nafiseh Mansouriieh ◽  
Mehran Davallo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Magnetic Nanoparticles ◽  
Signal To Noise Ratio ◽  
Optimization Method ◽  
Uptake Capacity ◽  
Batch System ◽  
Removal Experiments ◽  
Main Effects ◽  
Magnetic Nanoparticles Fe3o4

This study synthesized magnetic nanoparticles (Fe3O4) immobilized on activated carbon (AC) and used them as an effective adsorbent for Cu(II) removal from aqueous solution. The effect of three parameters, including the concentration of Cu(II), dosage of Fe3O4/AC magnetic nanocomposite and pH on the removal of Cu(II) using Fe3O4/AC nanocomposite were studied. In order to examine and describe the optimum condition for each of the mentioned parameters, Taguchi's optimization method was used in a batch system and L9 orthogonal array was used for the experimental design. The removal percentage (R%) of Cu(II) and uptake capacity (q) were transformed into an accurate signal-to-noise ratio (S/N) for a ‘larger-the-better’ response. Taguchi results, which were analyzed based on choosing the best run by examining the S/N, were statistically tested using analysis of variance; the tests showed that all the parameters’ main effects were significant within a 95% confidence level. The best conditions for removal of Cu(II) were determined at pH of 7, nanocomposite dosage of 0.1 gL−1 and initial Cu(II) concentration of 20 mg L−1 at constant temperature of 25 °C. Generally, the results showed that the simple Taguchi's method is suitable to optimize the Cu(II) removal experiments.

scholarly journals Preparation of nitric acid modified powder activated carbon to remove trace amount of Ni(II) in aqueous solution

2019 ◽  
Vol 80 (1) ◽  
pp. 86-97
Author(s):  
Peidong Su ◽  
Junke Zhang ◽  
Jiawei Tang ◽  
Chunhui Zhang
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Nitric Acid ◽  
Functional Groups ◽  
Physical Adsorption ◽  
Adsorption Efficiency ◽  
Pore Width ◽  
Adsorption Model ◽  
Powder Activated Carbon ◽  
Neutral Conditions

Abstract The present study investigated the preparation of nitric acid modified powder activated carbon (MPAC) and its adsorption of trace amounts of Ni(II) from aqueous solution. Results showed that raw powder activated carbon modified with 15% nitric acid (MPAC-15%) had the most developed pore structure and the highest adsorption efficiency for Ni(II) in aqueous solution. For MPAC-15%, the pore width was dominated by micropores with pore width about 1 nm and the total amount of chemical functional groups of MPAC-15% was 0.6630 mmol/g. Ni(II) adsorption tests indicated that the highest adsorption efficiency of MPAC-15% was 98%. The adsorption saturation time of MPAC-15% was about 120 min and the pH-dependent adsorption test showed that neutral conditions (6.5 < pH < 7.5) were suitable for Ni(II) adsorption. The adsorption kinetic analysis revealed that the pseudo-second order adsorption model fitted the adsorption process significantly. Thus, Ni(II) adsorption by MPAC-15% was dominated not only by physical adsorption via highly developed micropores but also by chemical adsorption between Ni(II) and surface functional groups. Adsorption isotherm analysis illustrated the Langmuir model was favorable for the adsorption of Ni(II), with R2 = 0.9874.

scholarly journals REMOVAL OF LEAD (Pb2+) IONS FROM AQUEOUS SOLUTION BY ADSORPTION USING SUGARCANE BAGASSE ACTIVATED CARBON COATED WITH MAGNETIC NANOPARTICLES

2020 ◽  
Vol 4 (2) ◽  
pp. 401-408
Author(s):  
Abdullahi Muhammad ◽  
S. Y. Sati ◽  
A. H. Usman
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Magnetic Nanoparticles ◽  
Sugarcane Bagasse ◽  
Contact Time ◽  
Chemical Activation ◽  
Lead Ion ◽  
Neutral Medium ◽  
Vis Spectroscopy ◽  
Carbon Coated

An experiment to remove lead (II) ions through adsorption from its aqueous solution   using Sugarcane Bagasse Activated carbon (SBAC) was carried out. As one of the ways employ to reduce the high cost of treatment of industrial effluents.  Agricultural wastes could be considered as suitable material for the production of Activated Carbon due it high carbon contents, environmentally friendly and low cost of production. In this work, activated carbon was produced by chemical activation with sulphuric acid (H2SO4) of sugarcane bagasse materials. It was then coated with magnetic nanoparticle (Fe3O4) prepared by chemical precipitation of Fe2+ and Fe3+ salt from aqueous solution   and tested for its efficiency as an adsorbent for the removal of Lead(II) ion from aqueous solution .The surface morphology, structural and functional groups present were investigated using scanning electron microscope (SEM) and Fourier transform infrared (FTIR) spectroscopy. Shift and disappearance of some adsorption bands in the sugarcane bagasse activated carbon coated with magnetic nanoparticles testify the formation of the composite.  Optical properties were determined using UV Vis spectroscopy shows a wavelength ( of 400nm. Adsorption parameters such as effect of pH, contact time, initial concentration of Lead ion and adsorbent dosage were studied. Neutral medium was the optimum pH condition needed for the removal of lead with the percentage removal efficiency of 91%. It was found to be highly efficient at 0.4g of the dosage and at contact time of 60 minutes. This sugarcane bagasse is useful in adsorbing heavy metal in an aqueous solution

Growth and optimization of carbon nanotubes in powder activated carbon for an efficient removal of methylene blue from aqueous solution

2018 ◽  
Vol 40 (18) ◽  
pp. 2400-2415 ◽  
Author(s):  
Haiyam Mohammed Alayan ◽  
Mohammed Abdulhakim Alsaadi ◽  
Mohammed Khaled AlOmar ◽  
Mohd Ali Hashim
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Activated Carbon ◽  
Efficient Removal ◽  
Powder Activated Carbon
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