Modification of fibrous membrane for organic and pathogenic contaminants removal: from design to application

Morshed, Mohammad Neaz; Behary, Nemeshwaree; Vieillard, Julien; Guan, Jing; Derf, Franck Le; Nierstrasz, Vincent

doi:10.1039/d0ra01362e

Cited by 12 publications

(9 citation statements)

References 73 publications

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“…1a-c implies that, regardless of the type of the catalysts, with the changing in level in both X1 and X2, the response has significantly altered in a linear model which validates the statistically significant effect of pH and [H 2 O 2 ] μl on the response. Concentration may negatively affect the removal process as explained in various reports 8,20,46,47 .…”

Section: Resultsmentioning

confidence: 99%

“…Step size of 0.4 eV/step), and the narrow scan for the chemical state analysis with selected range for individual elements and step size of 0.1 eV/step was performed [41][42][43][44] . Morphological and structural analysis of such fibrous catalysts were extensively studied in our previous reports 20,33 .…”

Section: Methodsmentioning

confidence: 99%

“…The minimum time required for complete removal of dye using a particular catalyst through an individual set of experiment was considered as equilibrium time. The pH range in this study was estimated based on our previous investigation on same catalysts 20 . The equilibrium concentration (Q e ) of crystal violet solution was measured by referring the absorbance calibration curve of the known standard solution, which allowed calculating the relative dye concentration (%) in the reaction chamber based on initial dye concentration.…”

Section: Methodsmentioning

confidence: 99%

“…The responses considered were the reduction of dye concentration (%) after oxidation. Three different catalysts (based on the preparation process) chosen for this study were from our newly developed fibrous catalysts (PET-NH 2 -Fe|PET-Si-NH 2 -Fe|PET-SH-Fe) 20 . Electrokinetic and X-ray photoelectron spectroscopy (XPS) analysis of resultant materials were also studied.…”

mentioning

confidence: 99%

“…Electrokinetic and X-ray photoelectron spectroscopy (XPS) analysis of resultant materials were also studied. Synthesis and structural analysis of zerovalent iron nanoparticles, formation of Fe 2+ , reactive species and detailed mechanism of dye removal can be found in our previous studies 20,33 .…”

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confidence: 99%

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Statistical modeling and optimization of heterogeneous Fenton-like removal of organic pollutant using fibrous catalysts: a full factorial design

Morshed

Pervez

Behary

et al. 2020

Sci Rep

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This work focuses on the optimization of heterogeneous Fenton-like removal of organic pollutant (dye) from water using newly developed fibrous catalysts based on a full factorial experimental design. This study aims to approximate the feasibility of heterogeneous Fenton-like removal process and optionally make predictions from this approximation in a form of statistical modeling. The fibrous catalysts were prepared by dispersing zerovalent iron nanoparticles on polyester fabrics (PET) before and after incorporation of either polyamidoamine (PAMAM, –NH2) dendrimer, 3-(aminopropyl) triethoxysilane (APTES, –Si–NH2) or thioglycerol (SH). The individual effect of two main factors [pH (X1) and concentration of hydrogen peroxide-[H2O2]μl (X2)] and their interactional effects on the removal process was determined at 95% confidence level by an L27 design. The results indicated that increasing the pH over 5 decreases the dye removal efficiency whereas the rise in [H2O2]μl until equilibrium point increases it. The principal effect of the type of catalysts (PET–NH2–Fe, PET–Si–NH2–Fe, and PET–SH–Fe) did not show any statistical significance. The factorial experiments demonstrated the existence of a significant synergistic interaction effect between the pH and [H2O2]μl as expressed by the values of the coefficient of interactions and analysis of variance (ANOVA). Finally, the functionalization of the resultant fibrous catalysts was validated by electrokinetic and X-ray photoelectron spectroscopy analysis. The optimization made from this study are of great importance for rational design and scaling up of fibrous catalyst for green chemistry and environmental applications.

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Section: Resultsmentioning

confidence: 99%