Effective adsorption of lead ions using fly ash obtained in the novel circulating fluidized bed combustion technology

Coal fly ash was decorated with a graphene oxide–tungsten oxide nanorods nanocomposite (CFA/GO/WO 3 NRs nanocomposite) via a hydrothermal method and applied for the remediation of lead (Pb 2+ ions). The Pb 2+ ion-loaded spent adsorbent (CFA/GO/WO 3 NRs + Pb 2+ nanocomposite) was reused for the photodegradation of acetaminophen. CFA/GO/WO 3 NRs + Pb 2+ nanocomposite displayed rapid removal of Pb 2+ ions. Pseudo-second-order kinetics and the Langmuir isotherm model described the adsorption data. The adsorption capacity of the CFA/GO/WO 3 NRs nanocomposite was 41.51 mg/g for the removal of Pb 2+ ions. Additionally, the Pb 2+ ion-loaded spent adsorbent significantly influenced the degradation of acetaminophen by photocatalysis where 93% degradation was observed. It is worthy to note the reuse application of Pb 2+ ion-loaded spent adsorbent as a photocatalyst, which will significantly reduce the secondary waste obtained from conventional adsorption methods.

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“…Similarly, this pattern has been reported for adsorption of Pb 2+ ions by other researchers. 2 , 34 , 44 …”

Section: Resultsmentioning

confidence: 99%

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb²⁺ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

2021

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“…There are a large number of functional groups on the surface of FA and MFA, which play a crucial role in the process of adsorption of heavy metal ions. 20 The broadband at 3434 cm À1 is attributed to the stretching vibrations of O-H. 21 The peaks at 1636 cm À1 and 1419 cm À1 correspond to the C]C stretching bands in the aromatic ring. 22 The strong peak at 1040 cm À1 is the result of the asymmetric stretching vibrations of Si-O-Si.…”

Section: Resultsmentioning

confidence: 99%

Removal of Cr(vi) from wastewater by a two-step method of oxalic acid reduction-modified fly ash adsorption

XiaoLing

Fan²,

Li³

et al. 2019

RSC Adv.

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“…The data were analyzed using Proteus software (Netzsch). The TG curve is the change in mass loss and the DTA curve is the mass loss rate as a function of temperature [66,67].…”

Section: Characterization Of Raw Materialsmentioning

confidence: 99%

Hybrid Materials Based on Fly Ash, Metakaolin, and Cement for 3D Printing

et al. 2021

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Nowadays, one very dynamic development of 3D printing technology is required in the construction industry. However, the full implementation of this technology requires the optimization of the entire process, starting from the design of printing ideas, and ending with the development and implementation of new materials. The article presents, for the first time, the development of hybrid materials based on a geopolymer or ordinary Portland cement matrix that can be used for various 3D concrete-printing methods. Raw materials used in the research were defined by particle size distribution, specific surface area, morphology by scanning electron microscopy, X-ray diffraction, thermal analysis, radioactivity tests, X-ray fluorescence, Fourier transform infrared spectroscopy and leaching. The geopolymers, concrete, and hybrid samples were described according to compressive strength, flexural strength, and abrasion resistance. The study also evaluates the influence of the liquid-to-solid ratio on the properties of geopolymers, based on fly ash (FA) and metakaolin (MK). Printing tests of the analyzed mixtures were also carried out and their suitability for various applications related to 3D printing technology was assessed. Geopolymers and hybrids based on a geopolymer matrix with the addition of 5% cement resulted in the final materials behaving similarly to a non-Newtonian fluid. Without additional treatments, this type of material can be successfully used to fill the molds. The hybrid materials based on cement with a 5% addition of geopolymer, based on both FA and MK, enabled precise detail printing.

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Effective adsorption of lead ions using fly ash obtained in the novel circulating fluidized bed combustion technology

Cited by 40 publications

References 52 publications

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb²⁺ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb²⁺ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Removal of Cr(vi) from wastewater by a two-step method of oxalic acid reduction-modified fly ash adsorption

Hybrid Materials Based on Fly Ash, Metakaolin, and Cement for 3D Printing

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Effective adsorption of lead ions using fly ash obtained in the novel circulating fluidized bed combustion technology

Cited by 40 publications

References 52 publications

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb2+ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb2+ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Removal of Cr(vi) from wastewater by a two-step method of oxalic acid reduction-modified fly ash adsorption

Hybrid Materials Based on Fly Ash, Metakaolin, and Cement for 3D Printing

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Product

Resources

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Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb²⁺ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen

Coal Fly Ash Decorated with Graphene Oxide–Tungsten Oxide Nanocomposite for Rapid Removal of Pb²⁺ Ions and Reuse of Spent Adsorbent for Photocatalytic Degradation of Acetaminophen