Sustainable removal of 17α-ethynylestradiol from aqueous environment using rare earth doped lanthanum manganite nanomaterials

Merkulov, D. Šojić; Vlăzan, Paulina; Poienar, Maria; Bognár, Szabolcs; Ianăși, Cătălin; Sfîrloagă, Paula

doi:10.1016/j.cattod.2022.05.011

Cited by 10 publications

(7 citation statements)

References 70 publications

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“…It is observed that several absorption bands at 433, 619, 630, 853, 1373, 1477, 1637, 2924, and 3437 cm −1 are registered for these samples. The significant absorption bands for the LaMnO 3 materials from this work are approximately located in the same spectral range as the perovskite LaMnO 3 materials from the previous study obtained using the sol-gel synthesis method [14,17,31].…”

Section: Ft-ir Analysissupporting

confidence: 71%

“…In the case of the undoped and Pd-doped LaMnO 3 , the surface morphology shows that the particles are agglomerated into asymmetric formations, although these agglomerations are composed of extremely fine particles. The EDX mapping for the LaMnO 3 compound has also been reported in [14], where the uniform distribution of elements was also confirmed. The qualitative analysis of Ag-or Y-doped lanthanum manganite exhibit spherically aggregated particles free from agglomeration.…”

Section: Sem-edx/ Element Mappingsupporting

confidence: 58%

“…01-089-0678] and, for the doped materials, the Pm-3m space group is used [JCPDS card file no. 01-075-0440], as well as for the rare-earth-doped LaMnO 3 materials in [14]. Therefore, upon doping in the LaMnO 3 samples with Pd, Ag, or Y (this study), with rare earth Eu, Tb, and Ho [14], Pr or Eu [29], Na or Ca ion [30] changes are induced within the perovskite structure, which could have a great effect on the properties of the obtained materials.…”

Section: Xrd Analysismentioning

confidence: 90%

“…Furthermore, Fe-substituted LaMnO 3 materials were investigated as heterogeneous catalysts in the H 2 O 2 -assisted degradation of anionic dyes (Remazol Turquoise Blue, Remazol Brilliant Yellow) and cationic dyes (methylene blue, Safranine-O) in both the absence and presence of visible light irradiation [13]. Recently, the sustainable removal of 17α-ethynylestradiol (EE2) from aqueous environment has been shown using rare-earth-doped LaMnO 3 nanomaterials in [14], and the best removal efficiency was reached in the presence of Ho in LaMnO 3 , when 77% of endocrine disruptors EE2 were degraded after 30 min of UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Catalytic and Photocatalytic Degradation of Methyl Orange Using Doped LaMnO3 Compounds

et al. 2022

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LaMnO3 and 1% Pd-, Ag-, or Y-doped perovskite type nanomaterials were prepared by the sol-gel method, followed by heat treatment at a low temperature (600 °C for 6 h). The investigation through X-ray diffraction and FT-IR spectroscopy indicated that all samples were well crystallized, without secondary phases, and that the transition metal doping changed the crystal structure from the R-3c space group for the undoped LaMnO3 to the Pm-3m space group for the doped perovskite compounds. In this research paper, the efficiencies of the perovskite LaMnO3 materials for methyl orange removal were analyzed, wherein the effect of the doping ions and of the pH on the catalytic activity were studied together with a kinetic approach for the LaMnO3 materials at different values of the pH. Moreover, in the catalytic activity, it should be noted that a slightly better performance was obtained for the Ag-doped materials compared to the Y- and Pd-doped perovskite samples. The results presented for the perovskite LaMnO3 nanomaterials reinforce the interest in these multifunctional materials to be used in industrial applications; e.g., in water treatment.

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Section: Ft-ir Analysissupporting

confidence: 71%

Section: Sem-edx/ Element Mappingsupporting

confidence: 58%

Section: Xrd Analysismentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Investigation of Catalytic and Photocatalytic Degradation of Methyl Orange Using Doped LaMnO3 Compounds

et al. 2022

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“…In the present study, 6 mmol/l radical scavengers, t‐butyl alcohol (t‐BuOH), disodium ethylenediaminetetraacetate (EDTA‐2Na), 1,4‐benzoquinone (BQ) were tested to elaborate the role of reactive oxygen species and further to illustrate the mechanism of AO7 degradation (Figure 8a). The corresponding scavenged radicals are •OH for t‐BuOH (Pimentel et al, 2021), holes (h + ) for EDTA‐2Na (ŠojiD Merkulov et al, 2022), and •O 2 − for BQ (Smith et al, 2004). It is clear that the degradation of AO7 was significantly inhibited after 6 mmol/l t‐BuOH has been spiked into the system for 1 min.…”

Section: Resultsmentioning

confidence: 99%

Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous–percarbonate

Huang

Wang

Ruan

2022

Water Environment Research

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Factors affecting the degradation of Acid Orange 7 (AO7) were evaluated and optimized when ferrous was used to catalyze percarbonate in the present study. The optimized conditions included the initial pH values ranging from 3 to 11 for AO7 solution, the initial level of AO7, sodium percarbonate (SPC), and Fe 2+ . Some ions and natural organic materials, which commonly exist in natural water, were also tested to evaluate their potential impacts on the degradation of AO7. The degradation efficiency of AO7 was up to 95% under the optimized test conditions, where the ferrous/percarbonate/AO7 molar ratio was 15/10/1 in the 0.285 mmol/l AO7 aqueous solution. The presence of Cl À , SO 4 2À , NO 3 À , Na + , and Mg 2+ did not affect the removal of AO7. The addition of HCO 3 À significantly inhibited its removal, even when the concentration of HCO 3 À was low to 0.6 mmol/l. A slight inhibition effect was observed when the added concentration of humic acid ranged from 0.5 to 5 mg/l, whereas the residue of AO7 was significantly enhanced when the level of humic acid was continually increased from 50 to 100 mg/l. Hydroxyl radicals (•OH) were the main reactive intermediates controlling the oxidation of AO7 in the present Fe 2+ /SPC system. The produced intermediates through the degradation of AO7 were identified to include 2-coumaranone, 2-naphthol, phthalic acid, phthalimide, N-methylnaphthylamine, and 2-methylphenol. The proposed degradation pathways are consistent with the radical formation and the identified intermediates. Practitioner Points• The ferrous/percarbonate system can remove 95% of AO7 under the optimized conditions. • AO7 removal was inhibited by adding HCO 3 À and humic acid, but not affected by Cl À , SO 4 2À , NO 3 À , Na + , and Mg 2+ .• Hydroxylation, ring opening, and mineralization driven by the generated hydroxyl radicals were derived as the major processes for degrading AO7.

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Photocatalytic Degradation of Endocrine Disrupting Chemical 17-α Ethinylestradiol by TiO2 Nanoparticles Under Solar Light Irradiation

Khatun,

Furukawa,

Tateishi

et al. 2023

Environ. Process.

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Sustainable removal of 17α-ethynylestradiol from aqueous environment using rare earth doped lanthanum manganite nanomaterials

Cited by 10 publications

References 70 publications

Investigation of Catalytic and Photocatalytic Degradation of Methyl Orange Using Doped LaMnO3 Compounds

Investigation of Catalytic and Photocatalytic Degradation of Methyl Orange Using Doped LaMnO3 Compounds

Study on the catalytic degradation of Acid Orange 7 and the potential mechanism by ferrous–percarbonate

Photocatalytic Degradation of Endocrine Disrupting Chemical 17-α Ethinylestradiol by TiO2 Nanoparticles Under Solar Light Irradiation

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