Mass transfer and thermodynamic analysis on the removal of naphthalene from aqueous solution using oleic acid modified palm shell activated carbon

Kumar, Jatish; Amarnath, D. Joshua; Kumar, Pramod; Kaushik, C. Sai; Varghese, Marisa; Saravanan, A.

doi:10.5004/dwt.2018.22066

Cited by 39 publications

(5 citation statements)

References 45 publications

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“…Tis suggests that there are a limited number of binding sites available on the adsorbent surface, which are eventually occupied, and there is no binding interaction between the MB molecules to form a multilayer. Tis is consistent with the monolayer adsorption of the Langmuir isotherm model, which is common nonlinear behavior [63,64]. Te nonlinearity behavior suggests that the adsorption process is not solely a physical interaction between the MB and the adsorbent surface; there might be chemical interactions involved.…”

Section: Adsorption Isotherm and Kinetics Modelsupporting

confidence: 78%

MnOx-Coffea arabica Husk and Catha edulis Leftover Biochar Nanocomposites for Removal of Methylene Blue from Wastewater

Kochito,

Gure,

Abdissa

et al. 2024

The Scientific World Journal

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In this study, we investigated the use of manganese oxide-biochar nanocomposites (MnOx-BNC), synthesized from coffee husk (CH) and khat leftover (KL) for the removal of methylene blue (MB) from wastewater. Pristine biochars of each biomass (CH and KL) as well as their corresponding biochar-based nanocomposites were synthesized by pyrolyzing at 300°C for 1 h. The biochar-based nanocomposites were synthesized by pretreating 25 g of each biomass with 12.5 mmol of KMnO4. To assess the MB removal efficiency, we conducted preliminary tests using 0.2 g of each adsorbent, 20 mL of 20 mg·L−1 MB, pH 7.5, and shaking the mixture at 200 rpm and for 2 h at 25°C. The results showed that the pristine biochar of CH and KL removed 39.08% and 75.26% of MB from aqueous solutions, respectively. However, the MnOx-BNCs removed 99.27% with manganese oxide-coffee husk biochar nanocomposite (MnOx-CHBNC) and 98.20% with manganese oxide-khat leftover biochar nanocomposite (MnOx-KLBNC) of the MB, which are significantly higher than their corresponding pristine biochars. The adsorption process followed the Langmuir isotherm and a pseudo-second-order model, indicating favorable monolayer adsorption. The MnOx-CHBNC and MnOx-KLBNC demonstrated satisfactory removal efficiencies even after three and six cycles of reuse, respectively, indicating their potential effectiveness for alternative use in removing MB from wastewater.

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Section: Adsorption Isotherm and Kinetics Modelsupporting

confidence: 78%

MnOx-Coffea arabica Husk and Catha edulis Leftover Biochar Nanocomposites for Removal of Methylene Blue from Wastewater

Kochito,

Gure,

Abdissa

et al. 2024

The Scientific World Journal

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“…The catalytic activity of the synthesized and characterized catalysts was evaluated in the Knoevenagel condensation using benzaldehyde 1a and malononitrile 2 as a model reaction in room temperature. Various parameters, including catalyst, solvent, catalyst loading, and reaction time, were investigated [ 52 ]. Initially, to identify the primary catalytic center of γ-Fe 2 O 3 -MgO@Ch.X (X: F/CN), a model reaction was conducted in a solvent-free environment for 30 min, employing γ-Fe 2 O 3 -MgO, Ch.F., and Ch.CN as catalysts at room temperature.…”

Section: Resultsmentioning

confidence: 99%

Modified nano magnetic Fe2O3-MgO as a high active multifunctional heterogeneous catalyst for environmentally beneficial carbon–carbon synthesis

Kamali,

Dreekvandy,

Mohammadkhani

et al. 2024

BMC Chemistry

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In this study, novel nanomagnetic catalysts, namely Fe2O3-MgO@choline formate (Ch. F.) and Fe2O3-MgO@choline cyanide (Ch. CN), were synthesized through immobilizing choline-based ion liquids to magnetic support via a simple and cost-effective methodology. FT-IR, TGA, FE-SEM, VSM, EDS, BET, and XRD techniques were employed to assess and characterize these organic–inorganic compounds. Following the successful preparation of nanoparticles, the catalysts were utilized in Knoevenagel and benzoin condensations. Fe2O3-MgO@Ch.F. exhibited exceptional activity in Knoevenagel condensation under solvent-free conditions at room temperature, achieving high yields (91–98%) in a short timeframe. Similarly, Fe2O3-MgO@Ch.CN demonstrated remarkable activity in benzoin condensation under environmentally friendly solvent conditions, yielding higher isolated yields (76–88%). Furthermore, these magnetically recyclable multifunctional catalysts displayed the ability to be reused up to five times without a significant loss in efficiency. Additionally, the heterogeneity of this nanocatalyst was investigated using the hot filtration technique. The findings indicated that the reaction primarily occurs via a heterogeneous pathway.

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“…The reports of the antimicrobial results were expressed as the average diameter of inhibition zones of the microbial growth around the disks in mm values, as accomplished in Table 2 . The optimization of antimicrobial evaluation was performed utilizing a statistical experimental design [ 61 – 63 ].…”

Section: Resultsmentioning

confidence: 99%

Novel synthesis of new triazine sulfonamides with antitumor, anti-microbial and anti-SARS-CoV-2 activities

Mohamed-Ezzat,

Elgemeie

2024

BMC Chemistry

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Novel approach for synthesizing triazine sulfonamide derivatives is accomplished via reacting the sulfaguanidine derivatives with N-cyanodithioiminocarbonate. Further reaction of the novel triazine sulfonamide analogues with various secondary amines and anilines generated various substituted triazine sulfonamide analogues of promising broad-spectrum activities including anti-microbial, anti-tumor, and anti-viral properties. The in vitro anti-proliferative activities of most of the novel compounds were evaluated on the NCI-60 cell line panel. The antifungal and antibacterial activities of the compounds were also estimated. The anti-viral activity against SARS CoV-2 virus was performed using MTT cytotoxicity assay to evaluate the half-maximal cytotoxic concentration (CC50) and inhibitory concentration 50 (IC50) of a representative compound from the novel triazine sulfonamide category. Compound 3a demonstrated potent antiviral activity against SARS-CoV-2 with IC50 = 2.378 µM as compared to the activity of the antiviral drug remdesivir (IC50 = 10.11 µM). Our results indicate that, upon optimization, these new triazine sulfonamides could potentially serve as novel antiviral drugs.

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Mass transfer and thermodynamic analysis on the removal of naphthalene from aqueous solution using oleic acid modified palm shell activated carbon

Cited by 39 publications

References 45 publications

MnOx-Coffea arabica Husk and Catha edulis Leftover Biochar Nanocomposites for Removal of Methylene Blue from Wastewater

MnOx-Coffea arabica Husk and Catha edulis Leftover Biochar Nanocomposites for Removal of Methylene Blue from Wastewater

Modified nano magnetic Fe2O3-MgO as a high active multifunctional heterogeneous catalyst for environmentally beneficial carbon–carbon synthesis

Novel synthesis of new triazine sulfonamides with antitumor, anti-microbial and anti-SARS-CoV-2 activities

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