Synthesis of superparamagnetic activated carbon for paracetamol removal from aqueous solution

Spessato, Lucas; Cazetta, André L.; Melo, Sandra A.R.; Pezoti, Osvaldo; Tami, Jéssica; Ronix, Amanda; Fonseca, Jhessica M.; Martins, Alessandro F.; Silva, Taís L.; Almeida, Vitor C.

doi:10.1016/j.molliq.2019.112282

Cited by 35 publications

(7 citation statements)

References 44 publications

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“…As shown in Figure 2e, the magnetisation curve of MCN is S‐shaped with a saturation magnetisation intensity of 53.17 emu/g, slightly lower than that of pure Fe 3 O 4 (68.72 emu/g). The magnified view of the hysteresis line at zero shows the MCN exhibiting an approximate zero coercivity and a remanence Br of 0.28 emu/g, with little remaining magnetisation when the external magnetic field is removed, suggesting that the MCN exhibits superparamagnetic behavior 37–42 . A comparison of the magnetic behavior of the prepared Fe 3 O 4 materials also gives a good indication of the superparamagnetic nature of the MCN, which suggests that the preparation of the MCN nanoparticles was successful 29 .…”

Section: Resultsmentioning

confidence: 91%

“…The magnified view of the hysteresis line at zero shows the MCN exhibiting an approximate zero coercivity and a remanence Br of 0.28 emu/g, with little remaining magnetisation when the external magnetic field is removed, suggesting that the MCN exhibits superparamagnetic behavior. [37][38][39][40][41][42] A comparison of the magnetic behavior of the prepared Fe 3 O 4 materials also gives a good indication of the superparamagnetic nature of the MCN, which suggests that the preparation of the MCN nanoparticles was successful. 29 Microreactors have complex flow channels at the micron scale and high-specific surface areas, providing for mass exchange and energy transfer.…”

Section: Properties Characterization Of Mcn-xmentioning

confidence: 90%

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Structural and flow properties of polysulfone/magnetic carbon nanomaterials under magnetic field induction

2023

J of Applied Polymer Sci

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Magnetic carbon nanomaterial (MCN) was prepared by hydrothermal method using microfluidic mixing of ferric tetroxide solution precursors, which was added into casting membrane solution, and magnetic polysulfone (PSF) composite membranes were prepared by phase inversion process after introducing an external magnetic field to treat the casting membrane solution. Microscope image depicts Fe 3 O 4 nanoparticles are uniformly loaded on carbon nanomaterials composed of graphene oxide and carbon nanotubes, and the MCN was obtained with less agglomeration, less Fe 2 O 3 impurities, and magnetization intensity of 53.17 emu/g, which is slightly lower than that of pure Fe 3 O 4 (68.72 emuÁg À1 ). Microscopic cross-sectional view of the membranes indicate the support pore structure still keep a finger-shaped pore structure but the surface roughness of composite membrane shows an increase in R a value compared with the pristine PSF (6.23 nm). The hydrophilicity of membranes show a marked improvement increased in contact angle (from 73.158 to 51.854 ), which effect the water flux (from 638.49 to 1089.81 LÁm À2 Áh À1 ) and permeability (from 1.42 to 2.57 μm 2 ), while the effective diameter of pore in membranes increase (from 1.3385 to 1.9078 μm) through bubble pressure method, and the rejection of bovine albumin decrease slightly (from 93.03% to 90.13%), but the values all reach over 90%, which show good permeate separation performance.

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Section: Resultsmentioning

confidence: 91%

Section: Properties Characterization Of Mcn-xmentioning

confidence: 90%

Structural and flow properties of polysulfone/magnetic carbon nanomaterials under magnetic field induction

2023

J of Applied Polymer Sci

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“…The second step describes intraparticle diffusion (moderate slope) induced by adsorbate mass transfer within the adsorbent surface pores. The third step exhibits an equilibrium state due to the adhesion of the adsorbate on the adsorption site (almost zero slope) [35]. The plot of the Qt = f (t 1/2 ) curve does not cross the origin, demonstrating that intraparticle diffusion participates in the adsorption mechanism but is not the only limiting step [36].…”

Section: Adsorption Studymentioning

confidence: 97%

Efficient Adsorption of Methyl Orange on Nanoporous Carbon from Agricultural Wastes: Characterization, Kinetics, Thermodynamics, Regeneration and Adsorption Mechanism

et al. 2022

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Nanoporous carbon derived from Moringa oleifera seed waste was synthesized by an original process of flash pyrolysis followed by zinc chloride impregnation. The N2-adsorption–desorption results of the optimized sample revealed a BET surface area of 699.6 m2/g and a pore size of 2 nm. It was evaluated for the adsorption of a mono azo dye, methyl orange (MeO), from aqueous solution. Four isothermal models (Langmuir, Freundlich, Dubinin–Radushkevic and Temkin) were applied to fit the experimental data. The results revealed that Langmuir is the most appropriate isothermal adsorption model to describe the adsorption process (X2 = 1.16); with an adsorption capacity 367.83 mg/g at 298 K, the interaction of MeO dye with the nanoporous carbon surface is a localized monolayer adsorption. The adsorption kinetics was consistent with the pseudo-second-order model and found to correlate well with the experimental data (X2 = 9.06). The thermodynamic study revealed a spontaneous and endothermic adsorption process, and the substances are adsorbed in a random manner. The desorption of MeO dye from MOC-ZnCl2 by sodium hydroxide solution was achieved to a level of about 84%, and the nanoporous carbon was recycled and reused at the fifth cycle. This work demonstrates that MOC-Zncl2 could be employed as an alternative to commercially available activated carbon in the removal of dyes from wastewater.

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“…Paracetamol (N-4-hydroxyphenylacetamide or acetaminophen), a common analgesic and anti-inflammatory for humans and animals, is usually chosen as a model molecule (García-Mateos et al, 2015;Lladó et al, 2015;Mestre et al, 2015Mestre et al, , 2011Spessato et al, 2020;Terzyk, 2001;Terzyk et al, 2003;Terzyk and Rychlicki, 2000) because it is a pharmaceutical compound used worldwide and does not require medical prescription. Depending on the source, 58 to 90% of the ingested paracetamol and its metabolites are excreted by the human body without being metabolised (Correia et al, 2016;Wu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Paracetamol removal by Kon-Tiki kiln-derived biochar and activated carbons

Fuentes

Canevesi

Gadonneix

et al. 2020

Industrial Crops and Products

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Biochar was obtained from Eucalyptus pruning residues with a non-conventional device named Kon-Tiki kiln. The average heat of combustion of the biochar, 27.3 MJ kg-1 , was higher than that of Eucalyptus wood, 17.8 MJ kg-1. Activation with CO 2 was performed by varying the activation time from 0 to 60 minutes. The activated carbons (ACs) and the carbon precursor have been characterised and tested for paracetamol removal in the liquid phase, studied in both kinetic and equilibrium aspects. ACs presented an increase in BET area (up to 845 m 2 /g), total pore volume and microporosity with the activation time. The pseudo-second order model was the one that best fitted the experimental data. Elimination of paracetamol was much faster when using ACs, 5h, than when using the biochar, 3 days. However, pollutant removal was greater than 95% for all materials, which is a promising result for lowcost biochars in a difficult economic context. All the adsorption equilibrium experiments exhibited multilayer behaviour, showing values up to 98 mg g-1 for the maximum monolayeradsorption capacity.

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Synthesis of superparamagnetic activated carbon for paracetamol removal from aqueous solution

Cited by 35 publications

References 44 publications

Structural and flow properties of polysulfone/magnetic carbon nanomaterials under magnetic field induction

Structural and flow properties of polysulfone/magnetic carbon nanomaterials under magnetic field induction

Efficient Adsorption of Methyl Orange on Nanoporous Carbon from Agricultural Wastes: Characterization, Kinetics, Thermodynamics, Regeneration and Adsorption Mechanism

Paracetamol removal by Kon-Tiki kiln-derived biochar and activated carbons

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