One-dimensional graphene for efficient aqueous heavy metal adsorption: Rapid removal of arsenic and mercury ions by graphene oxide nanoribbons (GONRs)

Sadeghi, Mohammad Hadi; Tofighy, Maryam Ahmadzadeh; Mohammadi, Toraj

doi:10.1016/j.chemosphere.2020.126647

Cited by 111 publications

(32 citation statements)

References 97 publications

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“…Here, C 0 : highest initial adsorbate concentration (mg.L − 1 ) and K L : Langmuir constant (L.mg − 1 ). R L shows the state of isotherm to be either unfavorable for R L > 1, favorable (0 < R L < 1), linear for R L = 1 or irreversible for R L = 0 [29].…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

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: 99%

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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“…Here, C0: the dye concentration at equilibrium (mg.L −1 ) and KL: the Langmuir constant (L.mg −1 ). RL shows the state of isotherm to be either unfavorable for RL > 1, favorable (0 < RL < 1), linear for RL = 1 or irreversible for RL = 0 [33].…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

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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“…RL shows the state of isotherm to be either unfavorable for RL > 1, favorable (0 < RL < 1), linear for RL = 1 or irreversible for RL = 0 [29].…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

Removal of methyl orange from from aqueous solutions using of PANI and PANI@Activated Carbon: Preparation, characterization, regeneration and comparative study

Bekhoukh

Moulefera

Zeggai

et al. 2021

Preprint

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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 specific surface area values (near 332 m2.g− 1) and total mesoporous volume (near 0.038 cm3.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 first- and pseudo second- orders, were exercised to the experimental results. The kinetic analysis revealed that the pseudo second order rate law performed better than the pseudo first order rate law in promoting the formation of the chemisorption phase. In the case of isothermal studies, an analysis of measured correlation coefficient (R2) values showed that the Langmuir model was a better match to experimental results than the Freundlich model. By regeneration experiments after five cycles, acceptable results were observed.

show abstract

One-dimensional graphene for efficient aqueous heavy metal adsorption: Rapid removal of arsenic and mercury ions by graphene oxide nanoribbons (GONRs)

Cited by 111 publications

References 97 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

Removal of methyl orange from from aqueous solutions using of PANI and PANI@Activated Carbon: Preparation, characterization, regeneration and comparative study

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