A Study on removal of Methylene Blue dye by photo catalysis integrated with nanofiltration using statistical and experimental approaches

Yadav, Deepak; Kishore, K. Anand; Saroj, Devendra

doi:10.1080/09593330.2020.1720303

Cited by 29 publications

(8 citation statements)

References 51 publications

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“…The aim of this present study is to develop the RSM model to optimise the hydroxyl value of bio-polyol from methyl oleate. To the best of the knowledge of the authors, there is no reported study regarding the optimisation of the reaction condition for the epoxide ring opening reaction using RSM, even though it is used as a statistical tool for the optimisation technique in other chemistry areas such as extraction of flavonoids [ 23 ] and waste water treatment [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Kamairudin¹,

Hoong

Abdullah

et al. 2021

Molecules

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The development of bio-polyol from vegetable oil and its derivatives is gaining much interest from polyurethane industries and academia. In view of this, the availability of methyl oleate derived from palm oil, which is aimed at biodiesel production, provides an excellent feedstock to produce bio-polyol for polyurethane applications. In this recent study, response surface methodology (RSM) with a combination of central composite rotatable design (CCRD) was used to optimise the reaction parameters in order to obtain a maximised hydroxyl value (OHV). Three reaction parameters were selected, namely the mole ratio of epoxidised methyl oleate (EMO) to glycerol (1:5–1:10), the amount of catalyst loading (0.15–0.55%) and reaction temperature (90–150 °C) on a response variable as the hydroxyl value (OHV). The analysis of variance (ANOVA) indicated that the quadratic model was significant at 98% confidence level with (p-value > 0.0001) with an insignificant lack of fit and the regression coefficient (R2) was 0.9897. The optimum reaction conditions established by the predicted model were: 1:10 mole ratio of EMO to glycerol, 0.18% of catalyst and 120 °C reaction temperature, giving a hydroxyl value (OHV) of 306.190 mg KOH/g for the experimental value and 301.248 mg KOH/g for the predicted value. This result proves that the RSM model is capable of forecasting the relevant response. FTIR analysis was employed to monitor the changes of functional group for each synthesis and the confirmation of this finding was analysed by NMR analysis. The viscosity and average molecular weight (MW) were 513.48 mPa and 491 Da, respectively.

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Section: Introductionmentioning

confidence: 99%

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Kamairudin¹,

Hoong

Abdullah

et al. 2021

Molecules

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“…In addition, the flux of the membrane was basically constant (Figure e), indicating that the membrane could effectively remove the intercepted dye molecules with the assistance of Ag/AgBr/AgVO 3 . As shown in Figure S4, the Ag/AgBr/AgVO 3 -NF membrane showed satisfactory dye removal efficiency relative to the membranes reported in the literature. − …”

Section: Resultsmentioning

confidence: 74%

Ag/AgBr/AgVO₃ Photocatalyst-Embedded Polyacrylonitrile/Polyamide/Chitosan Nanofiltration Membrane for Integrated Filtration and Degradation of RhB

Yue

Hou

Chen

et al. 2022

ACS Appl. Mater. Interfaces

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A nanofiltration (NF) membrane containing a NaOH-treated electrospun polyacrylonitrile (HPAN) substrate, an interfacial polymerization (IP) polyamide (PA) layer, a chitosan (CS) coating layer, and an Ag/AgBr/AgVO 3 photocatalyst loading layer was prepared. The structural evolution of the membranes was investigated, and their performance was estimated in accordance with the water flux and rejection rate. A probable mechanism for the photocatalytic activity of Ag/AgBr/AgVO 3 was proposed. The loading of the Ag/AgBr/AgVO 3 heterojunction on the HPAN/PA/CS NF membrane endowed the membrane with excellent self-cleaning properties owing to the photolytic degradation of the dye. The filtration and degradation processes of the Ag/AgBr/AgVO 3 -loaded membrane constantly promoted each other, and the treatment efficiency achieved with the integrated (filtration + degradation) process was superior to those obtained with the filtration and degradation processes alone. The Ag/AgBr/AgVO 3 -NF membrane exhibited excellent recyclability and stability when subjected to five integrated filtration−degradation processes. In addition, the Ag/AgBr/AgVO 3 -NF membrane exhibited an elastic modulus of 65.75 MPa and a toughness of 38.9 kJ/m 3 along with a good disinfection effect on Escherichia coli in visible light. The as-prepared photocatalyst-loaded NF membrane with excellent antifouling performance, antimicrobial activity, high strength, and recyclability showed potential for continuous water purification operation.

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“…Titanium dioxide films have demonstrated their capacity as a nano‐photocatalytic material, effectively decolorizing MB along with various other dyes and organic compounds [58] …”

Section: Resultsmentioning

confidence: 99%

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂Films: A Fractional Factorial Design Approach

Naranjo‐Castañeda,

García‐Rocha,

Gallardo‐Hernández

et al. 2024

ChemistrySelect

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In this research, selected catalytic activity conditions of nano Cu‐TiO2 films were evaluated through a 2IV4−1 Fractional Factorial Design for methylene blue discoloration. The following conditions were set at two levels: dye concentration (mg/L) (A) at 3.13 and 5.81; aeration (psi) (B) with and without; radiation (nm) (C) at 320 (UV) and 470 (Visible); and nano‐TiO2 films (D) without and with Cu‐doping. Films were prepared by the Sol‐Gel dip‐coating method and characterized using X‐ray diffraction, revealing an anatase phase in TiO2; and anatase, rutile, and brookite crystalline phases in Cu‐doped nano‐TiO2, with average band gap energies of 3.82 and 3.77 eV. The catalytic activity of films was significantly affected (p<0.05) by aeration (0.0002), radiation (0.001), and Cu‐doped nano‐TiO2 (0.004). Dye concentration did not have a significant effect; however, the AC interaction was significant (p=0.015). A discoloration efficiency of 46.23 % was obtained with 5.81 mg/L dye concentration using Cu‐doped TiO2, with UV radiation and without aeration, whereas a 52.32 % efficiency was achieved with 3.13 mg/L dye concentration using non Cu‐doped TiO2. Using factorial designs allows us to identify the main variables and their interactions to determine the optimal conditions for the catalytic activity of nano‐TiO2.

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A Study on removal of Methylene Blue dye by photo catalysis integrated with nanofiltration using statistical and experimental approaches

Cited by 29 publications

References 51 publications

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Ag/AgBr/AgVO₃ Photocatalyst-Embedded Polyacrylonitrile/Polyamide/Chitosan Nanofiltration Membrane for Integrated Filtration and Degradation of RhB

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂Films: A Fractional Factorial Design Approach

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A Study on removal of Methylene Blue dye by photo catalysis integrated with nanofiltration using statistical and experimental approaches

Cited by 29 publications

References 51 publications

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Optimisation of Epoxide Ring-Opening Reaction for the Synthesis of Bio-Polyol from Palm Oil Derivative Using Response Surface Methodology

Ag/AgBr/AgVO3 Photocatalyst-Embedded Polyacrylonitrile/Polyamide/Chitosan Nanofiltration Membrane for Integrated Filtration and Degradation of RhB

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO2Films: A Fractional Factorial Design Approach

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Product

Resources

About

Ag/AgBr/AgVO₃ Photocatalyst-Embedded Polyacrylonitrile/Polyamide/Chitosan Nanofiltration Membrane for Integrated Filtration and Degradation of RhB

Evaluation of Catalytic Conditions for Dye Discoloration Using Nano‐TiO₂Films: A Fractional Factorial Design Approach