A new kinetic models analysis for CO adsorption on palladium zeolite nanostructure by roll-coating technique

Mozaffari, Nastaran; Mirzahosseini, Alireza; Mozaffari, Niloofar

doi:10.24200/amecj.v3.i02.106

Cited by 10 publications

(6 citation statements)

References 68 publications

(82 reference statements)

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“…Characterization of the hemp hurds SEM analysis presented in figure 2 illustrates the morphological changes in the unloaded and loaded biosorbent. After the biosorption of heavy metal ions, the surface of the biosorbent became smoother and less porous, suggesting possible physical retention and adsorption of the metal ions onto the biosorbent [37,46]. The surface morphology of the biosorbent is distinctive and rough, providing a favorable environment for adsorption.…”

Section: Resultsmentioning

confidence: 99%

Utilizing sustainable hemp biomass as an eco-friendly for potentially toxic elements removal from water

Üstün-Odabaşı

2024

Mater. Res. Express

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Potentially toxic elements in water is one of the important environmental problems. In this study, it was aimed to produce an environmentally friendly and cost-effective biosorbent using sustainable hemp biomass. The chemical composition of hemp biosorbents was characterized by FTIR, SEM, and XRD, and the results showed that the biosorbent could be a good alternative. A batch system was used to investigate the effects of initial concentration, pH, contact time, and temperature on the removal performance of Cu (II) and Zn (II) ions. The statistical analysis was performed, and the amount of adsorbed substance, kinetic values, and experiment results were evaluated for suitability. Kinetic data determined the best fit to pseudo-second-order kinetics for Cu (II) and Zn (II) ions. Adsorption determined the Langmuir model for Cu (II) ions and the Freundlich model for Zn (II) ions. The maximum adsorption capacity in the batch system was determined as 25.59 mg/g for Cu (II) and 12.97 mg/g for Zn (II) ions. The obtained thermodynamic data confirmed the endothermic nature of the adsorption. In desorption studies, after three cycles, the adsorption efficiency decreased from 83.3% to 52.8% for Cu (II) and from 82.1% to 49.7% for Zn (II). Study results showed that hemp biosorbent may be an alternative adsorbent that can be used to remove PTEs from wastewater.

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Section: Resultsmentioning

confidence: 99%

Utilizing sustainable hemp biomass as an eco-friendly for potentially toxic elements removal from water

Üstün-Odabaşı

2024

Mater. Res. Express

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“…The Cu(II) ions’ equilibrium concentrations in the solid and liquid phases were expressed using a variety of models, including the Freundlich, Langmuir, Dubinin–Radushkevich (D-R), and Temkin isotherm models (Mozaffari et al 2020a ; Azzam et al 2022 ) These models can be expressed in linearized forms, as demonstrated in Table S3 .…”

Section: Resultsmentioning

confidence: 99%

Functional Ag-EDTA-modified MnO2 nanocoral reef for rapid removal of hazardous copper from wastewater

Ali,

Azzam

2023

Environ Sci Pollut Res

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A novel MnO2@EDTA-Ag nanocoral reef was constructed via a simplified redox reaction followed by EDTA and Ag nanoparticles impregnation to capture hazardous copper (II) from wastewater. A comprehensive characterization of the synthesized materials was conducted. The morphology of MnO2@EDTA-Ag in the form of a nanocoral reef was constructed of two-dimensional nanoplatelets and nanorod-like nanostructures. The optimal adsorption conditions proposed by the Plackett–Burman design (PBD) that would provide a removal % of 99.95 were pH 5.5, a contact time of 32.0 min, a Cu(II) concentration of 11.2 mg L−1, an adsorbent dose of 0.05 g, and a temperature of 40.3 °C. The loading of Ag nanoparticles onto MnO2@EDTA improved the adsorption capability of MnO2@EDTA-Ag. Additionally, the recyclability of MnO2@EDTA-Ag nanocoral reef was maintained at 80% after three adsorption–desorption cycles, and there was no significant change in the XRD analysis before and after the recycling process, implying its stability. It was found that nanocoral reef-assisted EDTA formed a chelation/complexation reaction between COO− groups and C–N bonds of EDTA with Cu(II) ions. In addition, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analysis proved the synergistic effect of the electrostatic interaction and chelation/complexation was responsible for the removal mechanism of Cu(II). Also, the results demonstrated no significant variation in MnO2@EDTA-Ag removal efficiency for all the tested real water samples, revealing its efficacy in wastewater treatment. Therefore, the current study suggests that MnO2@EDTA-Ag has substantial potential to be used as a feasible adsorbent for probable hazardous metals remediation.

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“…Important derivations from this analysis are as follows: (1) the adsorption of MB on CS-AV follows a FP kinetic model, indicating a deviation from classical first-order kinetics, (2) adsorption rate (𝑘) is relatively high, suggesting a rapid adsorption process and (3) the model moderately fits the experimental data (R 2 values around 0.7). Generally, a value of 𝑣 between 0 and 1 suggests fractional-order kinetics, as obtained in Kuete et al (2020) and Mozaffari et al (2020). The higher the value of 𝑣, the more the kinetics deviate from classical first-order kinetics.…”

Section: B Fractional Power Kinetic Parametersmentioning

confidence: 93%

Methylene Blue Adsorption Kinetics Investigation by Coconut Shell Activated Carbon Adsorbent Using Fractional Power, Avrami and Bangham Models

Yusuf,

Abubakar,

Abdulrazak

et al. 2024

ENPESJ

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Methylene blue is not easily biodegradable, and its persistence in water can contribute to long-term contamination if not properly treated. Numerous adsorption kinetic study successes were achieved utilizing activated carbons of coconut shell, especially the Pseudo-First and Pseudo-Second order models with little/no regards to the unique behavior described by the Avrami, Bangham and the Fractional Power kinetic models. The parameters in those models are determined to describe the sorption mechanism. Avrami model fitting results suggests a complex adsorption process, which does not follow the first-order kinetic. Obtained results show that the Fractional Power model best described the Coconut Shell-Activated Carbon Methylene blue bio-sorption process at constant adsorption capacity of 15937.8 mg/g. Findings show that Bangham kinetic model does not fit the experimental data for Methylene blue sorption from aqueous solution. Methylene blue exposure issues like gastrointestinal discomfort, skin and eye irritation, and imbalances in the populations of various species in aquatic ecosystems due to impacts on their growth, reproduction and survival, may be solved using a very effective adsorbent, such as the Coconut Shell -Activated Carbon used here.

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A new kinetic models analysis for CO adsorption on palladium zeolite nanostructure by roll-coating technique

Cited by 10 publications

References 68 publications

Utilizing sustainable hemp biomass as an eco-friendly for potentially toxic elements removal from water

Utilizing sustainable hemp biomass as an eco-friendly for potentially toxic elements removal from water

Functional Ag-EDTA-modified MnO2 nanocoral reef for rapid removal of hazardous copper from wastewater

Methylene Blue Adsorption Kinetics Investigation by Coconut Shell Activated Carbon Adsorbent Using Fractional Power, Avrami and Bangham Models

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