Strong adsorption of CV dye by Ni ferrite nanoparticles for waste water purification: Fits well the pseudo second order kinetic and Freundlich isotherm model

Debnath, Simi; Das, Ratan

doi:10.1016/j.ceramint.2023.01.218

Cited by 51 publications

(19 citation statements)

References 75 publications

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“…Previous research had also demonstrated that the decreasing molecular weight and increasing content of oxygen-containing functional groups were always triggered by natural or artificial UV-aging processes, thereby influencing the polarity, hydrophilicity, and charge of the micro/nanoplastic surface. , These changes further affect the adsorption behavior to MC-LR. In the present study, the values of 1/ n (the surface heterogeneity factor, when the 1/ n value lies between 0 < 1/ n < 1, it indicates favorable adsorption) were all less than 1 (Table S3), implying that the adsorption process of pristine and aged PSNPs was favorable (nonlinear adsorption), the adsorption first occurs at the high energy site of PSNPs, then occupies the low energy site. The adsorption rate decreases gradually with adsorption, which indicates that the aging did not alter the adsorption mechanism.…”

Section: Discussionmentioning

confidence: 56%

“…33,34 These changes further affect the adsorption behavior to MC-LR. In the present study, the values of 1/n (the surface heterogeneity factor, when the 1/n value lies between 0 < 1/n < 1, it indicates favorable adsorption 35 ) were all less than 1 (Table S3), implying that the adsorption process of pristine and aged PSNPs was favorable (nonlinear adsorption), 36 the adsorption first occurs at the high energy site of PSNPs, then occupies the low energy site. The adsorption rate decreases gradually with adsorption, 37 which indicates that the aging did not alter the adsorption mechanism.…”

Section: ■ Discussionmentioning

confidence: 57%

“…The adsorption rate decreases gradually with adsorption, which indicates that the aging did not alter the adsorption mechanism. Additionally, the high value of the correlation coefficient (Table S3) for both the pristine and aged PSNPs suggested that the adsorption of MC-LR well matches the Langmuir isotherm model, which implied that the adsorption occurs on the homogeneous surface without interactions among the adsorbed molecules . Based on the value of q e (represents the quantity of MC-LR that gets adsorbed per g of pristine or aged PSNPs), it was shown that the adsorption capacity of aged PSNPs was 2.65-fold of that on the pristine PSNPs (Table S3).…”

Section: Discussionmentioning

confidence: 84%

“…Additionally, the high value of the correlation coefficient (Table S3) for both the pristine and aged PSNPs suggested that the adsorption of MC-LR well matches the Langmuir isotherm model, which implied that the adsorption occurs on the homogeneous surface without interactions among the adsorbed molecules. 35 Based on the value of q e (represents the quantity of MC-LR that gets adsorbed per g of pristine or aged PSNPs), it was shown that the adsorption capacity of aged PSNPs was 2.65-fold of that on the pristine PSNPs (Table S3). Numerous studies found that the aging process can increase the adsorption of pollutants (including heavy metals and hydrophilic organic chemicals), 19,38 and the main mechanism for the hydrophilic organic chemicals is the increase of hydrogen bonding.…”

Section: ■ Discussionmentioning

confidence: 99%

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Microcystins-Loaded Aged Nanoplastics Provoke a Metabolic Shift in Human Liver Cells

Shen

Salam

et al. 2023

Environ. Sci. Technol.

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Studies concerning the toxicity of pollutant-loaded nanoplastics (NPs) toward humans are still in their infancy. Here, we evaluated the adsorption of microcystins (MCs) by pristine and aged polystyrene nanoplastics (PSNPs), prepared MCs-loaded aged PSNPS (1, 5, 10, 15, and 19 μg/mg), and systematically mapped the key molecular changes induced by aged and MCs-loaded PSNPs to human hepatoblastoma (HepG2) cells. According to the results, MC-LR adsorption is increased 2.64-fold by aging, and PSNP accumulation is detected in HepG2 cells. The cytotoxicity of the MC-LR-loaded aged PSNPs showed a positive relationship with the MC-LR amount, as the cell viability in the 19 μg/mg loading treatment (aPS-MC19) was 10.84% lower than aged PSNPs; meanwhile, more severe oxidative damage was observed. Primary approaches involved stressing the endoplasmic reticulum and reducing protein synthesis that the aged PSNPs posed for HepG2 cells, while the aggravated cytotoxicity in aPS-MC19 treatment was a combined result of the metabolic energy disorder, oxidative damage, endoplasmic reticulum stress, and downregulation of the MC-LR target protein. Our results confirm that the aged PSNPs could bring more MC-LR into the HepG2 cells, significantly interfere with biological processes, and provide new insight into deciphering the risk of NPs to humans.

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Section: Discussionmentioning

confidence: 56%

Section: ■ Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 84%

Section: ■ Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Microcystins-Loaded Aged Nanoplastics Provoke a Metabolic Shift in Human Liver Cells

Shen

Salam

et al. 2023

Environ. Sci. Technol.

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“…On the other hand, the pseudosecond-order kinetic equation (equation ( 2)) describes chemisorption, in which electrons are shared and exchanged between the adsorbent and adsorbate [30][31][32]:…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Preparation and performance of surface-modified adsorbent materials from discarded traditional chinese medicine residues

Ren,

Wang,

Zhou

et al. 2023

Mater. Res. Express

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Waste Chinese medicine residue was used as a raw material and pretreated with sodium hydroxide and hydrogen peroxide, followed by chemical modification with a silane to prepare an inexpensive and highly efficient hydrophobic biobased adsorbent material. The adsorbent was characterized with SEM, TGA and FTIR analyses. The adsorption capacities and wettabilities of the Chinese medicine residue were analyzed before and after surface modification to explore the adsorption performance and surface modification mechanism of the material. The results showed that the modified Chinese medicine residue was rough and uniformly modified with successfully grafted hydrophobic functional groups, and it had added adsorption sites exhibiting good hydrophobicities and oleophilicities. The contact angles between the modified materials and water reached 127°, and the modified Chinese medicine residue had an adsorption capacity of 51.7 mg/g for organic compounds, which was a significant improvement over the original waste Chinese medicine residue. The adsorption kinetics were best described with the pseudosecond-order kinetic model, which exhibited a higher linear correlation and was closer to the measured adsorption equilibrium value based on chemical adsorption. This study demonstrated a novel use of waste Chinese medicine residues for environmental remediation.

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Ecofriendly synthesis of selenium nanoparticles using agricultural Citrus fortunella waste and decolourization of crystal violet from aqueous solution

Solmaz,

Turna,

Baran

2024

Can J Chem Eng

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In this study, the reuse of Citrus fortunella (CF) plant waste, an agricultural product, was evaluated within the scope of sustainability. In this context, selenium nanoparticles (CF‐Se NPs) were synthesized from CF waste extracts and crystal violet (CV) dye was removed. The characteristic structure of the synthesized CF‐Se NPs was determined by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X‐ray (EDX), Fourier transform infrared spectroscopy (FTIR), UV–vis spectroscopy, and point of zero charge (pHpzc). Batch adsorption tests were applied to determine the effect of the synthesized CF‐Se NPs on CV removal. Four different kinetic and isotherm models were examined using error analysis functions. While the particle size of CF‐Se NPs was determined as 27.58 nm, the pHpzc value was calculated as 9.40, the average surface charge distribution was −24.1 mV, and mass losses were 9.03% and 13.42% at 334.99 and 739.21°C, respectively. The most suitable kinetic and isotherm model for CV removal with CF‐Se NPs was determined to be pseudo‐second‐order with a R2‐value of 0.999 and Freundlich with R2‐value of 0.993, and the qmax was calculated as 23.55 mgCV/gCF‐SeNPs. The effectiveness of CF‐Se NPs synthesized from waste in CV removal is a remarkable issue in terms of sustainable production.

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Strong adsorption of CV dye by Ni ferrite nanoparticles for waste water purification: Fits well the pseudo second order kinetic and Freundlich isotherm model

Cited by 51 publications

References 75 publications

Microcystins-Loaded Aged Nanoplastics Provoke a Metabolic Shift in Human Liver Cells

Microcystins-Loaded Aged Nanoplastics Provoke a Metabolic Shift in Human Liver Cells

Preparation and performance of surface-modified adsorbent materials from discarded traditional chinese medicine residues

Ecofriendly synthesis of selenium nanoparticles using agricultural Citrus fortunella waste and decolourization of crystal violet from aqueous solution

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