Enhanced adsorption of methylene blue from textile wastewater by using natural and artificial zeolite

Turp, Sinan Mehmet; Turp, Güldane Aslı; Ekinci, Necla; Özdemir, Saim

doi:10.2166/wst.2020.358

Cited by 13 publications

(2 citation statements)

References 15 publications

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“…8 b). The photocatalyst surface has a positive and negative charge at pH values lower and higher than pH pzc , respectively 34 , 35 . Therefore, in high pH solutions, the photocatalyst surface has a more negative charge.…”

Section: Resultsmentioning

confidence: 99%

One-step hydrothermal synthesis of CeVO4/bentonite nanocomposite as a dual-functional photocatalytic adsorbent for the removal of methylene blue from aqueous solutions

Farhadi,

Mousavi-Kamazani,

Keramati

et al. 2024

Sci Rep

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Cerium vanadate/modified bentonite (CeVO4/mbt) nanocomposite with different composition percentages was synthesized through a simple one-step hydrothermal method at 180 ℃, and then its photocatalytic activity was evaluated by decolorizing methylene blue (MB) in an aqueous solution under light exposure. In order to increase the surface area as an important parameter in photocatalytic processes, bentonite was modified by ball mill method. The structural and optical properties of the synthesized composites were determined by XRD, FT-IR, DRS, FESEM, EDS, and BET measurements. XRD and EDS results confirmed the successful synthesis of pure CeVO4. FESEM images and EDS mapping showed a proper distribution of rice-like CeVO4 nanoparticles on bentonite. The removal efficiency of MB with only 0.1 g of CeVO4/mbt nanocomposite in 15 min was about 99%, which is significant compared to neat bentonite and pure CeVO4 with efficiency of 30% and 57%. The mentioned nanocomposite followed the first-order kinetics, had a reaction rate constant equal to 0.1483 min–1, and showed acceptable stability in five consecutive cycles.

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Section: Resultsmentioning

confidence: 99%

One-step hydrothermal synthesis of CeVO4/bentonite nanocomposite as a dual-functional photocatalytic adsorbent for the removal of methylene blue from aqueous solutions

Farhadi,

Mousavi-Kamazani,

Keramati

et al. 2024

Sci Rep

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show abstract

“…Therefore, the adsorption and nally the destruction of a substance with more positive charge occurs. On the other hand, in solutions with low pH, the surface of the sample is positive and the absorption of a negatively charged substance occurs more [34]. Three solutions with pHs of 4, 7 and 9 were prepared after adding CeVO 4 /mbt and exposed to visible light for 15 minutes.…”

Section: Ph Effect On Methylene Blue Degradationmentioning

confidence: 99%

CeVO 4 /Bentonite nanocomposite as a dual-functional photocatalytic adsorbent: One-step hydrothermal synthesis for enhanced water-soluble pollutant degradation

Farhadi,

Mousavi-Kamazani,

Keramati

et al. 2024

Preprint

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Cerium vanadate/Bentonite (CeVO4/bt) nanocomposite with different composition percentages was synthesized through a simple one-step hydrothermal method at 180 ℃ then photocatalytic activity was evaluated by decolorizing methylene blue (MB) in an aqueous solution under light exposure. The structural and optical properties of the synthesized composites were determined by XRD, FT-IR, DRS, FESEM, EDS, and BET measurements. XRD and EDS results confirmed the successful synthesis of CeVO4. The calculated band gap energy for modified cerium vanadate/bentonite (CeVO4/mbt) was the lowest among all, indicating its more appropriateness for photocatalytic removal of MB dye. nanoparticles were well distributed on bentonite. Due to the synergistic effects, the MB removal efficiency (for just 0.1 g) of CeVO4/mbt nanocomposite was significantly increased (99% in 15 min) compared with neat bentonite, CeVO4, and CeVO4/bt samples. The mineralization degree of MB dye was also studied which obtained 61% for CeVO4/mbt sample. The mentioned nanocomposite followed the first order kinetics and constant speed equal to 0.957 min-1 and showed acceptable stability in five consecutive cycles. This research presents a simple approach to creating novel, very efficient modified nanocomposites for use in photocatalysis applications.

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Effect of temperature and fly ash content on the catalytically pyrolyzed rice straw biochar–fly ash composites for methylene blue adsorption

Bhardwaj

Nag

Hussain

et al. 2022

Asia-Pacific J Chem Eng

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Rice straw and fly ash are the wastes produced in abundance which need immediate attention for their management. In the present study, the in situ pyrolysis of rice straw in presence of fly ash was carried out and the resultant composites were studied for adsorption of methylene blue (MB). Slow pyrolysis of rice straw in presence of fly ash is evaluated using thermogravimetric analysis (TGA) and Coats-Redfern equation for pseudo-first-order reaction kinetics, respectively. The activation energy (E a ) for the pyrolysis of rice straw was 41.75 kJ/mol which was lowered to 37.39 kJ/mol in presence of fly ash. Biochar fly ash composites BFA4 1-3 , BFA5 1-3 , and BFA6 1-3 were prepared at three 400 C, 500 C, and 600 C pyrolysis temperature, respectively, the subscript indicating three different ratios of rice straw and fly ash (1:3, 1:1, and 3:1 w/w ratio). The composites BF4-6 1-3 were neutral to alkaline in pH, due to the presence of basic oxide and carbonates minerals. BFA4-6 1-3 was studied for batch adsorption of MB and optimized for pH, dose, and initial concentration of adsorbate. The maximum MB adsorption capacity of 25.91 mg/g was reported for the composite BFA4 1 . MB adsorption efficiency (q e ) followed the trend BFA4 1-3 > BFA5 1-3 > BFA6 1-3 , which indicates a strong influence of biochar surface functional groups on dye adsorption, as reiterated by the multiple linear regression (MLR) analysis. Stripping of MB was achieved using methanol as a stripping agent for MB-adsorbed BFA4-6 1-3 with desorption efficiency of 7% to 11% in the first cycle and 23% to 100% in the second cycle.Thus, the biochar fly ash composite with optimum ion exchangeable functional organic moieties would be suitable for dye remediation and waste generated in the process could find application in soil amelioration. K E Y W O R D S adsorption-desorption, composite biochar, dye, thermogravimetric analysis Akanksha Bhardwaj and Shilpa Nag have equal contributions to the paper.

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Enhanced adsorption of methylene blue from textile wastewater by using natural and artificial zeolite

Cited by 13 publications

References 15 publications

One-step hydrothermal synthesis of CeVO4/bentonite nanocomposite as a dual-functional photocatalytic adsorbent for the removal of methylene blue from aqueous solutions

One-step hydrothermal synthesis of CeVO4/bentonite nanocomposite as a dual-functional photocatalytic adsorbent for the removal of methylene blue from aqueous solutions

CeVO 4 /Bentonite nanocomposite as a dual-functional photocatalytic adsorbent: One-step hydrothermal synthesis for enhanced water-soluble pollutant degradation

Effect of temperature and fly ash content on the catalytically pyrolyzed rice straw biochar–fly ash composites for methylene blue adsorption

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