Adsorption of organic and inorganic pollutants on activated bio-carbons prepared by chemical activation of residues of supercritical extraction of raw plants

Bazan-Woźniak, Aleksandra; Pietrzak, Robert

doi:10.1016/j.cej.2020.124785

Cited by 58 publications

(42 citation statements)

References 35 publications

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“…In conformity with the Freundlich isotherm, the adsorbed molecules cannot be greater than of active sites number, and the layer formed on nanoadsorbent surface authorized development of following layers [30]. The isotherm is determined by the next law:…”

Section: Batch Adsorption Experimentsmentioning

confidence: 96%

Anionic Methyl Orange Removal from Aqueous Solutions by Activated Carbon Reinforced Conducting Polyaniline as Adsorbent: Synthesis, Characterization, Adsorption Behavior, Regeneration and Kinetics Study

et al. 2021

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This work investigated the elimination of Methyl Orange (MO) using a new adsorbent prepared from Activated Carbon (AC) with polyaniline reinforced by a simple oxidation chemical method. The prepared materials were characterized using XRD, TGA, FTIR and nitrogen adsorption isotherms. Furthermore, PANI@CA highest speci c surface area values (near 332 m 2 .g − 1 ) and total mesoporous volume (near 0.038 cm 3 .g − 1 ) displayed the better MO removal capacity (192.52 mg.g − 1 at 298 K and pH 6.0), which is outstandingly higher than that of PANI (46.82 mg.g − 1 ). Besides, the process's adsorption, kinetics, and isothermal analysis were examined using various variables such as pH, MO concentration and contact time. To pretend the adsorption kinetics, various kinetics models, the pseudo rst-and pseudo secondorders, were exercised to the experimental results. The kinetic analysis revealed that the pseudo second order rate law performed better than the pseudo rst order rate law in promoting the formation of the chemisorption phase. In the case of isothermal studies, an analysis of measured correlation coe cient (R 2 ) values showed that the Langmuir model was a better match to experimental results than the Freundlich model. By regeneration experiments after ve cycles, acceptable results were observed.

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Section: Batch Adsorption Experimentsmentioning

confidence: 96%

Anionic Methyl Orange Removal from Aqueous Solutions by Activated Carbon Reinforced Conducting Polyaniline as Adsorbent: Synthesis, Characterization, Adsorption Behavior, Regeneration and Kinetics Study

et al. 2021

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show abstract

“…In conformity with the Freundlich isotherm, the adsorbed molecules cannot be greater than of active sites number, and the layer formed on nanoadsorbent surface authorized development of following layers [34]. The isotherm is determined by the next law:…”

Section: Batch Adsorption Experimentsmentioning

confidence: 96%

Synthesis of PANI@ZnO Hybrid Material and Evaluations in Adsorption of Congo Red and Methylene Blue Dyes: Structural Characterization and Adsorption Performance

Toumi

Djelad

Chouli

et al. 2021

J Inorg Organomet Polym

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In this research, a simple oxidation chemical process was applied for the synthesis of novel PANI@ZnO nanocomposite. The prepared nanocomposites were characterized by XPS, XRD, FTIR, SEM, TGA and N2 adsorption-desorption isotherms. Thereby, PANI@ZnO highest SBET values (about 40.84 m 2 .g −1 ), total mesoporous volume (about 3.214 cm 3 .g −1 ) and average pore size (about 46.12 nm). Afterwards, the prepared nanomaterial was applied as novel nanoadsorbent for the adsorption of Congo Red (CR) and Methylene Blue (MB) dyes from aqueous solutions at 298 K and pH 5.0. Besides, the pseudo-second-order model was obtained the best for the adsorption of both dyes. In the case of isotherm models, the Freundlich model showed the best fit. After removal, the spent adsorbent was regenerated. With the regeneration repeated five cycles, the PANI@ZnO regeneration efficiency remained at a very adequate level.

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“…Likewise, removal of 30.88% of organic matter expressed as COD and 13.90% of TP was obtained as shown in Table 2. This removal was possibly due to the fact that some of these materials, such as activated carbon, can adsorb organic pollutants from water due to their physicochemical properties (Bazan‐Wozniak & Pietrzak, 2020; Ferraz & Yuan, 2020). Likewise, König et al.…”

Section: Resultsmentioning

confidence: 99%

Kinetics of a fixed bed reactor with immobilized microorganisms for the removal of organic matter and phosphorous

Bustos-Terrones

Ramírez-Pereda

Bustos-Terrones

et al. 2020

Water Environment Research

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The biodegradation of domestic wastewater contaminants has been carried out using microorganisms immobilized in sodium alginate gel (Alg‐Na). A fixed bed reactor with immobilized microorganisms was used for the treatment of domestic wastewater. A wastewater pretreatment was carried out to remove the larger particulate matter, which consisted of a reactor packed with different materials (anthracite, zeolite, and activated carbon). Later, a second reactor packed with balls with immobilized microorganisms was used to eliminate organic matter and nutrients. 2.5% w/v of Alg‐Na was used as a support to immobilize the microorganisms. According to the results, a total phosphorus (TP) and chemical oxygen demand (COD) removal of 94.26% and 78.25% was obtained, respectively. In addition, the degradation rate for both organic matter and phosphorous was studied by using the kinetic model for fix bed reactor. © 2020 Water Environment Federation Practitioner points Phosphorous and organic matter removal by adsorption and immobilized microorganisms. High removal efficiency of phosphorous and organic matter was found. An innovative wastewater treatment alternative is proposed. Kinetic model for fixed bed reactor is also proposed for scaling‐up purposes.

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Adsorption of organic and inorganic pollutants on activated bio-carbons prepared by chemical activation of residues of supercritical extraction of raw plants

Cited by 58 publications

References 35 publications

Anionic Methyl Orange Removal from Aqueous Solutions by Activated Carbon Reinforced Conducting Polyaniline as Adsorbent: Synthesis, Characterization, Adsorption Behavior, Regeneration and Kinetics Study

Anionic Methyl Orange Removal from Aqueous Solutions by Activated Carbon Reinforced Conducting Polyaniline as Adsorbent: Synthesis, Characterization, Adsorption Behavior, Regeneration and Kinetics Study

Synthesis of PANI@ZnO Hybrid Material and Evaluations in Adsorption of Congo Red and Methylene Blue Dyes: Structural Characterization and Adsorption Performance

Kinetics of a fixed bed reactor with immobilized microorganisms for the removal of organic matter and phosphorous

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