Tetracycline removal with activated carbons produced by hydrothermal carbonisation of Agave americana fibres and mimosa tannin

Selmi, Taher; Sánchez-Sánchez, Á.; Gadonneix, Philippe; Jagiełło, Jacek; Seffen, Mongi; Sammouda, Habib; Celzard, Alain; Fierro, Vanessa

doi:10.1016/j.indcrop.2018.02.005

Cited by 86 publications

(50 citation statements)

References 56 publications

(59 reference statements)

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“…Lignin-rich precursors, such as olive stones, produce carbons with textural characteristics similar to those of carbon molecular sieves [12,13]. While those precursors richer in cellulose and hemicellulose, such as agave, develop slightly broader PSDs [14].…”

Section: Introductionmentioning

confidence: 99%

Enhanced resolution of ultra micropore size determination of biochars and activated carbons by dual gas analysis using N2 and CO2 with 2D-NLDFT adsorption models

Jagiełło¹,

Kenvin²,

Celzard

2019

Carbon

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In this study, biochars obtained by either direct carbonization or hydrothermal treatment of corn stems were used as precursors of two series of activated carbons (ACs). The pore size distributions (PSDs) of biochars and ACs were evaluated from N 2 and CO 2 adsorption isotherms using models based on the two-dimensional version of the non-local density functional theory (2D-NLDFT). We showed that more detailed carbon PSDs might be obtained from simultaneous (dual) gas analysis of both N 2 and CO 2 isotherms than from single isotherms. The dual gas method showed a peak at about 0.4 nm which was not detected by the single N 2 analysis. This fact is related to the restricted diffusion of N 2 into very narrow micropores at low temperatures and pressures. By modifying the lower pore width limit w min in the nitrogen model, we obtained an excellent fit of the dual model to both isotherms for all studied samples, which demonstrates the reliability and robustness of this refined method. Finally, we demonstrated that this approach would allow measuring N 2 isotherms at relative pressures starting at about 0.001 rather than at 10-6 , which would save time without losing resolution of the calculated PSD.

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Section: Introductionmentioning

confidence: 99%

Enhanced resolution of ultra micropore size determination of biochars and activated carbons by dual gas analysis using N2 and CO2 with 2D-NLDFT adsorption models

Jagiełło¹,

Kenvin²,

Celzard

2019

Carbon

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“…Adsorption is also considered as an attractive alternative for dye removal, and activated carbons (ACs), due to their highly developed surface area and easy-tuned surface chemistry, are among the most commonly used materials for that purpose (Danish et al, 2018a). Indeed, they can efficiently remove organic and inorganic pollutants (Acosta et al, 2018;Ghouma et al, 2015;Podder and Majumder, 2016;Selmi et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

“…ACs can be synthesised through two well-known processes: physical and chemical activation. Moreover, many studies have been published, reporting the production of activated carbon by physical activation of biomass (Altenor et al, 2012;Enaime et al, 2017;Gaspard et al, 2006;Selmi et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

“…HTC is attracting growing attention because it also allows stabilising the macrocellular structure of biomass before pyrolysis, and also because the resultant carbons usually have a higher mesoporosity (Selmi et al, 2018a). The final morphology of those materials pre-treated by HTC indeed shows a mixed structure in which the lignin backbone has been preserved and where cellulose produced microspheres.…”

Section: Introductionmentioning

confidence: 99%

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Hydrothermal pre-treatment, an efficient tool to improve activated carbon performances

Mbarki

Selmi

Kesraoui

et al. 2019

Industrial Crops and Products

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In this study, the successful preparation of activated carbons from Corn Stigmata, either through direct pyrolysis and activation or through a preliminary additional hydrothermal carbonisation (HTC) step, was reported. It was shown that the latter allowed producing higher carbon yield, higher carbon content and higher BET area (A BET) after 2h of activation with CO 2 than what was observed for activated carbons (ACs) prepared in the same conditions but without HTC. The AC having the most developed porous texture, A BET = 1111 m 2 /g, was further investigated by FTIR, SEM and potentiometric titration, and its pH at point of zero charge was determined. Its performances in terms of methylene blue (MB) adsorption were studied and discussed in relation to its textural and chemical characteristics. Due to its very heterogeneous surface, the fractal Brouers-Sotolongo model was the most relevant for describing both kinetic and equilibrium adsorption data. The calculated thermodynamic parameters also showed that MB adsorption was spontaneous on this material. The high MB uptake at room temperature, compared to many other results published in the literature, further confirmed the interest of Corn Stigmata-derived hydrochars as precursors of activated carbons.

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“…Many technologies have been applied for TC removal, namely adsorption [9], electrochemistry [10], advanced oxidation processes [11] and membrane processes [7]. Among them, adsorption is a cost-effective and fast removal technology [12] and several high-performance adsorbents have been proposed, including activated sludge [13], soil/clays, metal oxides [14], nanocomposite [15] and activated carbon [16]. Recently, biomass-derived adsorbents (biochar) have attracted the interest of scientific community because of their advantages such as low cost, easy operation and are environmentally friendly [17,18].…”

Section: Introductionmentioning

confidence: 99%

Efficient Heterogeneous Activation of Persulfate by Iron-Modified Biochar for Removal of Antibiotic from Aqueous Solution: A Case Study of Tetracycline Removal

et al. 2019

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Waste reutilization is always highly desired in the environmental engineering and science community. In this study, Fe-SCG biochar was functionalized by modifying spent coffee grounds (SCG) with magnetite (Fe3+) at 700 °C and applied for the oxidative removal of tetracycline (TC) with the presence of persulfate (PS). The effects of pH, dosage of biochar and sodium persulfate and initial TC concentration on TC degradation were investigated in a batch system. Our results show that higher TC degradation efficiency was obtained at low pH, low initial TC concentration, and at high dosages of PS and biochar. The highest removal efficiency (96%) was achieved by Fe-SCG/PS under the conditions of pH = 2.0, [Fe-SCG] = 2.5 g/L, [PS] = 60 mM and [TC] = 1 mM. The proposed Fe-SCG catalyst could be a promising effective biochar for the remediation of other emerging organic contaminants.

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Tetracycline removal with activated carbons produced by hydrothermal carbonisation of Agave americana fibres and mimosa tannin

Abstract: Two series of carbons were prepared from Agave americana fibres (A) mixed with

Cited by 86 publications

References 56 publications

Enhanced resolution of ultra micropore size determination of biochars and activated carbons by dual gas analysis using N2 and CO2 with 2D-NLDFT adsorption models

Enhanced resolution of ultra micropore size determination of biochars and activated carbons by dual gas analysis using N2 and CO2 with 2D-NLDFT adsorption models

Hydrothermal pre-treatment, an efficient tool to improve activated carbon performances

Efficient Heterogeneous Activation of Persulfate by Iron-Modified Biochar for Removal of Antibiotic from Aqueous Solution: A Case Study of Tetracycline Removal

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