Removal of toxic methyl orange by a cost-free and eco-friendly adsorbent: Mechanism, phytotoxicity, thermodynamics, and kinetics

Dutta, Sachinandan; Amin, Md. Khairul; Ahmed, Jamil; Elias, Md.; Mahiuddin, Md.

doi:10.1016/j.sajce.2022.03.006

Cited by 46 publications

(41 citation statements)

References 64 publications

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“…The pHZPC < pH is favorable for cationic dye owing to the negative charge of the AHLP surface. Conversely, the pHZPC > pH is favourable for anionic dye because that time surface carries a positive charge (Dutta et al, 2022). Fig.…”

Section: Zero-point Charge (Phzpc) Analysismentioning

confidence: 97%

“…The leaves were once again washed and boiled for approximately 30 min at 100 °C to remove colouring pigments. After boiling the leaves, they were sun-dried for 24 h and then dried at 110 °C for 16 h. Later, the leaves were grounded and stored to use as AHLP adsorbent (Dutta et al, 2022).…”

Section: Adsorbent Preparationmentioning

confidence: 99%

“…Where qe and qt denote the amount (mg.g -1 ) of dye adsorbed at equilibrium and at a certain time t (min), respectively, and 𝑘 1 represents the rate constant (min -1 ) of adsorption. The equation can be transformed linearly by integrating = 0 at the limit of t = 0 and qt = qt at t = t (Saeed et al, 2020) (Shokrollahi et al, 2011) (Dutta et al, 2022. Table 1.…”

Section: Kinetics Studiesmentioning

confidence: 99%

“…(L.mg -1 ) 1/n is linked with the binding energy; Ce, the equilibrium adsorbate concentration (mg.L -1 ); and n is the heterogeneity factor or adsorption intensity. The n values indicate the sorption favourability, with a range of 2-10 representing good sorption, 1-2 representing moderately complex sorption, and below 1 describing poor sorption (Ma et al, 2013) (Freundlich, 1907) (Dutta et al, 2022). The different variables of equilibrium adsorption isotherm qm, KL, RL, KF, and n were estimated from the linear Langmuir and…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…The reduction of dye adsorption efficiency and adsorption capacity at elevated temperatures revealed the exothermic adsorption process. This signifies the reduction in adsorptive force within AHLP and MB as the temperature rises(Dutta et al, 2022)(Ojha and Bulasara, 2015)(Mustafa T.. Within the temperature range investigated, the ideal temperature for MB dye adsorption was 300 K.…”

mentioning

confidence: 94%

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Cost-effective and eco-friendly leaf-based bio-adsorbent for methyl blue dye adsorption: thermodynamics, kinetics, isotherms, and phytotoxicity

Dutta

Elias²,

Anis-Ul-Haque

et al. 2023

Preprint

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The elimination of textile dye from wastewater is an ecological and environmental barrier to continued industrial expansion. The current study aims to analyse the anionic methyl blue (MB) dye's ability to bind to the Artocarpus heterophyllus leaf powder (AHLP) and assess its capacity to eliminate the dye from an aqueous solution. The Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), X-ray diffraction (XRD), and zero-point charge (pHzpc) analyses were utilised to characterise the leaf powder (adsorbent). The adsorption efficiency was evaluated through various conditions, including solution pH (3-10), dye concentration (20-50 mg.L-1), AHLP dosage (1.50-8.0 g.L-1), contact time (0-90 min), and temperature (300-323 K). The maximum dye adsorption efficiency (91.10%) was achieved within 45 min, using 3.0 g.L-1 adsorbent dose in 20 mg.L-1 MB solution at pH 4.0 and 300 K temperature. The adsorption mechanism was congruent with the pseudo-second-order model (R2 > 0.99) and the Langmuir model (R2 = 1.0). Several thermodynamic parameters, like enthalpy change (∆Ho), Gibbs free energy change (∆Go), and entropy change (∆So) were analysed to identify the spontaneity and exothermic nature of the adsorption. Besides, the phytotoxicity trials on Cicer arietinum seeds revealed 0%, 80%, 87%, and 100% germination in the experimental MB solution, treated MB solution, MB-loaded AHLP, and fresh water, respectively, confirming the non-toxicity of both the treated MB solution and MB-loaded AHLP adsorbent. Therefore, the AHLP adsorbent might be a potential material for wastewater management due to its several advantages, like cost-free, abundant, easy to prepare, fast and high efficiency, and eco-friendly.

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Section: Zero-point Charge (Phzpc) Analysismentioning

confidence: 97%

Section: Adsorbent Preparationmentioning

confidence: 99%

Section: Kinetics Studiesmentioning

confidence: 99%

Section: Adsorption Isothermsmentioning

confidence: 99%

mentioning

confidence: 94%

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Cost-effective and eco-friendly leaf-based bio-adsorbent for methyl blue dye adsorption: thermodynamics, kinetics, isotherms, and phytotoxicity

Dutta

Elias²,

Anis-Ul-Haque

et al. 2023

Preprint

Self Cite

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Elimination of Dibenzothiophene from Model Gasoline by Binary Biowastes‐Derived Activated Carbon

Nayyef

Fadhil

2023

Chem Eng & Technol

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A novel activated carbon (AC) was created from an equal blend of date stones and walnut shells by ZnCl2 chemical activation. The impact of the impregnation and the carbonization conditions on the AC synthesis was investigated. Numerous techniques were used to identify the optimal AC. The best AC sample was created at a 1:1 ZnCl2/feed impregnation ratio, 500 °C, and in 60 min, with a surface area of 1039.20 m2g−1. This AC was employed for the removal of dibenzothiophene (DBT) from model gasoline. Superior removal of DBT (98.18 %) was accomplished using 25 mL DBT solution (200 mg L−1) and an AC dose of 0.35 g at 30 °C for a contact period of 30 min. The Freundlich isotherm and the pseudo‐second‐order kinetic model best described the DBT sorption compared to other models.

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Synthesis of Novel Photocatalysts Based on Polyoxovanadates Supported onto Zeolites Employed for Azo Dye Degradation

Leal Marchena,

Ortenzi,

Pierella

et al. 2024

ChemistrySelect

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Heterogeneous photocatalysts based on polyoxovanadates with Keggin structure (POV) supported onto zeolite (NH4ZSM‐5) were developed. The amount of POV incorporated was varied from 5% to 30% wt. Catalysts were characterized by N2 adsorption–desorption isotherms, FT‐IR, XRD, DRS UV–vis, TGA, and 31P MAS‐NMR techniques; and the catalytic activity was evaluated in azo dye degradation. The specific surface area decreased as the POV content increased because of zeolite pore blocking. The XRD patters presented the characteristic peaks of NH4ZSM‐5 and POV, with no additional diffraction peaks, assigned to a well dispersed POV. FT‐IR and 31P MAS‐NMR results confirm that the Keggin structure of [PVW11O40]4− anions remain unaltered after their inclusion in the zeolite. The incorporation of POV generated a redshift at the absorption border, determined by DRS UV–vis, which promotes its activity in the visible range. Moreover, while POV content increase the bandgap energy diminishes and the photocatalytic activity increased. The higher photoactivity was 80% of discoloration when 30% wt of POV was incorporated. The characterization and catalytic evaluation indicated that these materials present suitable properties to be used as catalysts in the photocatalytic treatment of wastewater, being the main advantage their easy separation and reuse without significant decrease of the photoactivity.

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Removal of toxic methyl orange by a cost-free and eco-friendly adsorbent: Mechanism, phytotoxicity, thermodynamics, and kinetics

Cited by 46 publications

References 64 publications

Cost-effective and eco-friendly leaf-based bio-adsorbent for methyl blue dye adsorption: thermodynamics, kinetics, isotherms, and phytotoxicity

Cost-effective and eco-friendly leaf-based bio-adsorbent for methyl blue dye adsorption: thermodynamics, kinetics, isotherms, and phytotoxicity

Elimination of Dibenzothiophene from Model Gasoline by Binary Biowastes‐Derived Activated Carbon

Synthesis of Novel Photocatalysts Based on Polyoxovanadates Supported onto Zeolites Employed for Azo Dye Degradation

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