Adsorption of heavy metals from aqueous media on graphene-based nanomaterials

Galunin, Evgeny; Burakova, I. V.; Neskoromnaya, E. A.; Babkin, Alexander V.; Melezhik, A. V.; Burakov, A. E.; Ткачев, А. Г.

doi:10.1063/1.5079338

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…Adsorption is considered one of the preferred methods for the removal of these toxic metals under low concentration conditions due to its simple operation, low energy consumption, low environmental impact, and treatment to desired concentration levels [10][11][12]. Various efficient adsorbents have been widely reported for heavy metal removal, such as silica [13], zeolites [14,15], and carbon-based nanomaterials, including activated carbon [16], carbon nano-fibers, and nano-tubes [17], graphene [18], and MXenes [19]. To further improve the effectiveness and economics of the adsorption process novel adsorbent materials continue to be developed with higher adsorption capacity and more rapid kinetics for heavy metal removal.…”

Section: Introductionmentioning

confidence: 99%

MXene/chitosan/lignosulfonate (MCL) nanocomposite for simultaneous removal of Co(II), Cr(VI), Cu(II), Ni(II) and Pb(II) heavy metals from wastewater

Othman

Mackey²,

Mahmoud³

2023

2D Mater.

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In this work, a novel Ti3C2Tx MXene/ chitosan/lignosulfonate adsorbent (MCL), was prepared via a facile decoration of Ti3C2Tx MXene sheets with chitosan/lignosulfonate nanospheres as a renewable and biodegradable additive that can improve the biocompatibility and aqueous stability of MXenes. Chitosan/lignosulfonate nanospheres were stabilized on the surface of MXne sheets, endowing them with a variety of surface functionalities, high specific surface area, and antioxidant characteristics. The competitive adsorption of multi-metal systems revealed that MCL had a preferential adsorption affinity toward various heavy metal ions; the MCL removal efficiency for the quinary-metal ions adsorption followed a trend of Pb(II) > Cr(VI) ≈ Cu(II) > Ni(II) ≈ Co(II) in neutral pH conditions. A moderate reduction was observed for Cu(II) and Cr(VI) ions. For all metals, the kinetics data fitted well with the pseudo-second-order model, and the adsorption equilibrium was best described by the Langmuir model. The adsorption mechanism is suggested to be a synergic combination of electrostatic interaction, surface complexation, and ion exchange. The findings of this study provide a new approach for eco-friendly MXene surface modification and give a general pattern of metal pollutants interactions during adsorption.

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Section: Introductionmentioning

confidence: 99%

MXene/chitosan/lignosulfonate (MCL) nanocomposite for simultaneous removal of Co(II), Cr(VI), Cu(II), Ni(II) and Pb(II) heavy metals from wastewater

Othman

Mackey²,

Mahmoud³

2023

2D Mater.

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“…While GO offers high water permeance and stability [28][29][30], it is arguably its high theoretical surface area that offers the greatest advantage due to the enhanced adsorption capacity it affords [31,32]. The superior adsorption capacity of this carbon structure compared to more conventional adsorbent materials has already been demonstrated across a range of pollutant types including ECs [33][34][35][36][37][38][39]. However despite its strong removal performance, GO remains one of the more expensive sorbent options and efforts to improve its cost efficiency are warranted [40,41].…”

Section: Introductionmentioning

confidence: 99%

Comparative Life-Cycle Cost Analysis of Alternative Technologies for the Removal of Emerging Contaminants from Urban Wastewater

Pryce

Alsharrah

Khalil

et al. 2022

Water

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Emerging contaminants (ECs) continue to threaten our fragile ecosystem, yet their mitigation remains limited by economic factors. Meanwhile, a relatively expensive material, Graphene Oxide (GO), has shown promise as a solution for EC removal following further development into three graphene-based materials (GBMs): Porous graphene adsorbent (PGa), Graphene-oxide foam adsorbent (GOFa), and the hybrid filter. Due to the nuances of each synthesis process, financial costs will differ throughout the GBMs’ life cycle which have been quantified and compared in the present work at a range of possible breakthrough times. Finally, economic and environmental costs have been combined for each technology to compare eco-efficiency. Results demonstrated a substantial economic advantage of the GBMs when compared to alternative technologies, most notably the GOFa filter that incurred the lowest life-cycle costs at $1.73 ± 0.09/m3. This was mainly attributed to the lower demand of GOFa on the most expensive material required for material synthesis, hydrazine. In addition, the material demands of GOFa were more evenly distributed which suggest a higher resilience of the overall costs to price hikes of individual materials required for synthesis. In terms of eco-efficiency the GOFa filter also demonstrated the greatest improvement when compared to the reference technology These results have provided robust total investment costs for several technologies that can now offer contrast to other EC-removal solutions.

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Mechanism and kinetics of adsorption and removal of heavy metals from wastewater using nanomaterials

et al. 2021

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Adsorption of heavy metals from aqueous media on graphene-based nanomaterials

Cited by 9 publications

References 8 publications

MXene/chitosan/lignosulfonate (MCL) nanocomposite for simultaneous removal of Co(II), Cr(VI), Cu(II), Ni(II) and Pb(II) heavy metals from wastewater

MXene/chitosan/lignosulfonate (MCL) nanocomposite for simultaneous removal of Co(II), Cr(VI), Cu(II), Ni(II) and Pb(II) heavy metals from wastewater

Comparative Life-Cycle Cost Analysis of Alternative Technologies for the Removal of Emerging Contaminants from Urban Wastewater

Mechanism and kinetics of adsorption and removal of heavy metals from wastewater using nanomaterials

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