Adsorption of phenol from aqueous and cyclohexane solutions on activated carbons with differentiated surface chemistry

Deryło–Marczewska, Anna; Sternik, Dariusz; Świątkowski, Andrzej; Kuśmierek, Krzysztof; Gac, Wojciech; Buczek, B.

doi:10.1016/j.tca.2022.179299

Cited by 15 publications

(8 citation statements)

References 32 publications

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“…Table 4 presents the Langmuir and Freundlich parameters for phenol adsorption. It is observed that for all the activated carbons in this study, the Freundlich model obtained a better adjustment of the adsorption data than the Langmuir model, this tendency was observed in other works [ 69 , 70 ]. All the AC had a high adsorption capacity.…”

Section: Resultssupporting

confidence: 83%

“…All the AC had a high capacity for phenol adsorption, with a maximum capacity greater than 159 mg g −1 , especially the babassu AC (596, 69 mg g −1 ). The result of adsorption can be considered satisfactory, since the, in aqueous solutions H bonds decreases the adsorption of phenol [ 69 ]. This high adsorption can be attributed to the large surface area and microporosity of this carbon.…”

Section: Resultsmentioning

confidence: 99%

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Potential of agro-industrial residues from the Amazon region to produce activated carbon

Nobre,

Queiroz,

Castro

et al. 2023

Heliyon

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Potential of agro-industrial residues from the Amazon region to produce activated carbon

Nobre,

Queiroz,

Castro

et al. 2023

Heliyon

View full text Add to dashboard Cite

“…This phenomenon can be attributed to the presence of surface-oxygen groups, which reduce the density of π-electrons in graphene layers and the hydrophobicity of the surface and consequently decrease the dispersive adsorption potential of the adsorbent [ 25 ]. Other reasons for this phenomenon may be the blockage of micropores and reduction of the surface area available to the adsorbate due to the hydration of polar oxygen groups, as well as the damage of thin pore walls, resulting in a decrease in the micropore volume [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Adsorption of 2,4-D and MCPA Herbicides on Carbon Black Modified with Hydrogen Peroxide and Aminopropyltriethoxysilane

et al. 2022

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The carbon black N-220 surface was subjected to modification through H2O2 oxidation and deposition of aminopropyltriethoxysilane. The pristine (CB-NM) and modified materials (CB-Ox and CB-APTES) were characterized by N2 adsorption–desorption isotherms, scanning electron microscopy, energy-dispersive X-ray spectroscopy (SEM-EDS), thermogravimetry, and FTIR spectroscopy. Carbon black samples were applied as adsorbents for the removal of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-methyl-4-chlorophenoxyacetic acid (MCPA) herbicides from aqueous solutions. The influence of their surface properties on adsorption efficiency was analyzed and discussed. The results showed that the adsorption of the herbicides was pH-dependent, and the most favorable adsorption was observed in an acidic environment. The experimental data best fit pseudo-second-order and Langmuir models for kinetic and equilibrium data, respectively. The adsorption rate of both the herbicides increased in the order of CB-APTES < CB-Ox < CB-NM and was closely correlated with the mesopore volume of the carbon blacks. The monolayer adsorption capacities were found to be 0.138, 0.340, and 0.124 mmol/g for the adsorption of 2,4-D and 0.181, 0.348, and 0.139 mmol/g for the adsorption of MCPA on CB-NM, CB-APTES, and CB-Ox, respectively. The results showed that the surface chemistry of the adsorbent plays a more important role than its porous structure. Both herbicides were preferably adsorbed on APTES-modified carbon black and were adsorbed the worst on oxidized carbon black (CB-APTES > CB-NM > CB-Ox).

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“…This reality is leading the scientific community to continue to look for applications for this type of by-product, which may involve the use of physical and chemical modification processes, such as activation processes, to improve their physical and chemical properties. When biomass materials are used in these thermochemical processes, the large amounts of char become a good precursor to produce activated char [7,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Another stage of the process that is sometimes important to consider and explore is the pre-treatment of waste, particularly biomass, which can influence these results [12,13].…”

Section: Introductionmentioning

confidence: 99%

Use of By-Products from Gasification and Carbonization from Polymeric Residues and Biomass for Application in Liquid Phase Adsorption

et al. 2023

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The search for strategies that contribute to circular economy, based on the valorization of by-products of the most diverse industries and processes, is one of the main environmental objectives at present. This study aims to evaluate the possibility of valorizing by-products from the gasification and carbonization of polymeric residues and biomass of natural origin through their application in adsorption processes. The selected residues and carbon by-products resulting from thermochemical conversion by the gasification and carbonization processes, after their physical and chemical characterization, presented improved structural and chemical properties which allow their application in adsorption processes. The characterization of the materials and samples prepared in this work involved a variety of analytical techniques, such as thermogravimetric analysis, polarized attenuated Fourier transform infrared spectroscopy, X-ray fluorescence, ultimate analysis, and nitrogen adsorption at 77 K. It was possible to observe that the material has between 40% and 50% volatile matter, and when carbonized, these values decrease to the range of 5% and 10%. The BET surface area analysis of these chars shows values between 100 and 400 m2g−1. For the chemically activated samples and for the phenol molecule, the samples with the best results are those that were prepared using olive prunings as a precursor. For the physically activated samples and also for phenol adsorption, the samples that showed the most potential were the ones prepared via air activation. Regarding the gasified samples, the best results were achieved with the samples without the incorporation of waste-derived fuel.

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Adsorption of phenol from aqueous and cyclohexane solutions on activated carbons with differentiated surface chemistry

Cited by 15 publications

References 32 publications

Potential of agro-industrial residues from the Amazon region to produce activated carbon

Potential of agro-industrial residues from the Amazon region to produce activated carbon

Adsorption of 2,4-D and MCPA Herbicides on Carbon Black Modified with Hydrogen Peroxide and Aminopropyltriethoxysilane

Use of By-Products from Gasification and Carbonization from Polymeric Residues and Biomass for Application in Liquid Phase Adsorption

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