Fe3O4 nanoparticles functionalized GO/g-C3N4 nanocomposite: An efficient magnetic nanoadsorbent for adsorptive removal of organic pollutants

Sahoo, Smrutirekha; Padhiari, Sandip; Biswal, Susanta Kumar; Panda, Biswajit; Hota, Garudadhwaj

doi:10.1016/j.matchemphys.2020.122710

Cited by 84 publications

(16 citation statements)

References 57 publications

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“…In the selected area electron diffraction (SAED) pattern (inset of Fig. 1(e)), the bright rings arise from the planes of SCN 32 . The lattice fringes confirmed that SCN is crystalline, and the d ‐spacing was calculated to be d = 0.310 nm (002) (Fig.…”

Section: Resultsmentioning

confidence: 93%

Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

Dou

Shen

Zou

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND In this study, sulfur‐doped g‐C3N4 (SCN) nanosheets were synthesized using thiourea as a precursor, and then used to catalyze the degradation of oxytetracycline (OTC) under visible‐light irradiation. OTC was chosen as target contaminant because of it being an important precursor of N‐nitrosodimethylamine (NDMA). RESULTS The removal of OTC was influenced by its initial concentration, initial pH, SCN dosage and water matrices. OTC (≤10 mg L−1) was almost completely removed in 40 min under the conditions of an initial pH of 7.0 and a SCN dose of 1.0 g L−1, and its degradation was well described by the pseudo‐first‐order kinetics model. Water matrices would also influence the degradation of OTC in the system. Electron paramagnetic resonance analysis and trapping experiments confirmed that the function of the radicals for OTC removal followed the order of •O2− > •OH > h+. Eight transformation products were determined during the degradation of OTC, it being removed through four pathways: methyl oxidization, demethylation, decarbonylation and secondary alcohol oxidation. SCN was stable in the system, as the removal efficiency of OTC was not significantly reduced even after three recycles. In addition, 55.5% of NDMA formation potential of OTC was reduced after SCN catalytic oxidation. CONCLUSIONS The results imply that the visible‐light‐driven SCN catalytic oxidation is an effective technology not only for the removal of OTC but also for the reduction of NDMA formation potential. © 2021 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 93%

Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

Dou

Shen

Zou

et al. 2021

J of Chemical Tech & Biotech

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“…78 Fe 3 O 4 -decorated 2D/2D GO/g-C 3 N 4 has TC removal capacity of 120 mg g À1 . 79 Magnetic GO supported with diethylenetriaminepentaacetic acid (DDMGO) has more number of oxygen-and nitrogen-containing functional groups on the surface with enhanced reactivity and selectivity towards TC with removal capacity of 294.12 mg g À1 . 80 KOH-activated GO (G-KOH) with high SSA of 512 m 2 g À1 and more oxygen functional groups on the surface shows enhanced adsorption capacity for TC up to 539.59 mg g À1 .…”

Section: Adsorption Processmentioning

confidence: 99%

A review on tetracycline removal from aqueous systems by advanced treatment techniques

et al. 2020

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“…There are many spent magnetic nanoadsorbent regeneration methods among which the chemical method appears to be popular (Meng et al 2018 ; Campos et al 2019 ; Gagliano et al 2020 ; Sahoo et al 2020 ; Bakhshi Nejad and Mohammadi 2020 ; Biata et al 2020 ; Jain et al 2021 ; Peralta et al 2021 ). Other adsorbent regeneration methods are thermal (Aguedal et al 2019 ), supercritical extraction (Momina et al 2018 ), microbial regeneration (Momina et al 2018 ), solvent extraction (Dutta et al 2019 ), and microwave and ultraviolet irradiation (Sun et al 2017 ).…”

Section: Developments With Magnetic Nanoadsorbents and Magnetic Separationmentioning

confidence: 99%

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Mudhoo

Sillanpää

2021

Environ Chem Lett

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Pure water will become a golden resource in the context of the rising pollution, climate change and the recycling economy, calling for advanced purification methods such as the use of nanostructured adsorbents. However, coming up with an ideal nanoadsorbent for micropollutant removal is a real challenge because nanoadsorbents, which demonstrate very good performances at laboratory scale, do not necessarily have suitable properties in in full-scale water purification and wastewater treatment systems. Here, magnetic nanoadsorbents appear promising because they can be easily separated from the slurry phase into a denser sludge phase by applying a magnetic field. Yet, there are only few examples of large-scale use of magnetic adsorbents for water purification and wastewater treatment. Here, we review magnetic nanoadsorbents for the removal of micropollutants, and we explain the integration of magnetic separation in the existing treatment plants. We found that the use of magnetic nanoadsorbents is an effective option in water treatment, but lacks maturity in full-scale water treatment facilities. The concentrations of magnetic nanoadsorbents in final effluents can be controlled by using magnetic separation, thus minimizing the ecotoxicicological impact. Academia and the water industry should better collaborate to integrate magnetic separation in full-scale water purification and wastewater treatment plants.

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Fe3O4 nanoparticles functionalized GO/g-C3N4 nanocomposite: An efficient magnetic nanoadsorbent for adsorptive removal of organic pollutants

Cited by 84 publications

References 57 publications

Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

A review on tetracycline removal from aqueous systems by advanced treatment techniques

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

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Fe3O4 nanoparticles functionalized GO/g-C3N4 nanocomposite: An efficient magnetic nanoadsorbent for adsorptive removal of organic pollutants

Cited by 84 publications

References 57 publications

Green synthesis of sulfur‐doped g‐C3N4 nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

Green synthesis of sulfur‐doped g‐C3N4 nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

A review on tetracycline removal from aqueous systems by advanced treatment techniques

Magnetic nanoadsorbents for micropollutant removal in real water treatment: a review

Contact Info

Product

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Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential

Green synthesis of sulfur‐doped g‐C₃N₄ nanosheets for enhanced removal of oxytetracycline under visible‐light irradiation and reduction of its N‐nitrosodimethylamine formation potential