Synthesis of ZIF‐8/GO for the Removal of Congo Red From Wastewater With a High Salt Concentration

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(1)

Published: Jan. 1, 2025

Abstract Dye wastewater is high‐concentration salt‐containing chemical wastewater. It contains numerous toxic pollutants that are difficult to degrade, and its direct discharge without treatment will cause serious environmental problems. Herein, ZIF‐8/GO adsorbent was prepared by the one‐pot method purify containing Congo red dye (CR). possessed an S BET of 70.252 m 2 /g, pore volume 0.036 cm 3 size 3.22 nm. Adsorption experiments were performed based on various parameters, such as pH, concentration, dose, temperature, salt concentration. The results showed adsorption capacity better than ZIF‐8 GO for CR, which process 0.1‐ZIF‐8/GO (10.0 mg) CR (50 mg/L) reached equilibrium in 60 min at 35 °C under high‐salt parameter (10 g/L NaCl). And maximum removal ratio up 98%. data fitted using Langmuir, Freundlich isotherm models pseudo‐first‐order, pseudo‐second‐order kinetics model liquid film diffusion model, intra‐particle model. indicated quasi‐second‐order kinetic more suitable describe ZIF‐8/GO. possesses a high it has promising applications salts‐containing

Language: Английский

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Statistical physics and fractal like kinetic modelling for adsorption of acetaminophen on MgO/aminated β-cyclodextrin: Variables optimization using Box-Behnken Design

Journal of Industrial and Engineering Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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Novel MOF-based vanadium and 2,2 -bipyridine-4,4 -dicarboxylic acid as phenomenal dye adsorbent and antimicrobial agent

Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 13

Published: Jan. 30, 2025

In this study, a new MOF (metal-organic framework) based on vanadium and 2,2-bipyridine-4,4-dicarboxylic acid (V/BP-MOF) was synthesized. Synthesized V/BP-MOF introduced as strong adsorbent of Congo Red (CR) an effective agent in eliminating microbial species. the investigation CR absorption activity, several factors such concentration V/BP-MOF, pH, time, temperature were investigated. Antimicrobial evaluations carried out Common bacterial strains wastewater values MIC (minimum inhibitory concentration) MBC (Minimum Bactericidal Concentration) reported. The confirmed characterized by EA, EDS, EDS mapping, FT-IR, XRD, TGA, BET, SEM, TEM. checking characteristics size, specific surface area, thermal stability obtained, respectively, 68 nm, 325 m 2 /g, 320°C. highest adsorption CR, at 94%, obtained natural ambient temperature, after 150 min. kinetic studies, correlation coefficient 0.99 observed with pseudo-second-order model, while isotherm 0.97 Freundlich model. biological evaluations, best inhibition against Escherichia coli , 4 μg/mL μg/mL, respectively. As general result, can be potent absorbent dye antimicrobial properties. Therefore, compound synthesized study suitable option for treatment industry, multiple capabilities including removal chemical pollutants pathogenic agents.

Language: Английский

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Optimized Congo Red Dye Adsorption Using ZnCuCr-Based MOF for Sustainable Wastewater Treatment

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

This study presents the synthesis of a novel trimetallic ZnCuCr-TpIm metal-organic framework (MOF) via solvothermal method, yielding cubic crystals 300-500 nm. The integration Zn, Cu, and Cr metal centers enhances MOF's adsorption efficiency structural stability, distinguishing it from conventional MOFs. material achieves high Congo red dye removal (96.5%) under optimal conditions: 40 mg adsorbent dosage, 55 °C, pH 6-7, 60 min contact time. Kinetic analysis reveals that follows pseudo-second-order model (R2 > 0.999), indicating chemisorption as rate-limiting step, while equilibrium data align with Langmuir isotherm = 0.998), confirming maximum capacity 325 mg/g. FTIR XRD analyses confirm strong interactions between molecules MOF preserving its crystalline structure. demonstrated exceptional retaining 95% surface area after 72 h maintaining over 90% five reuse cycles, minimal ion leaching (<1.2 ppm). also exhibited resilience varying pH, salinity, simulated wastewater conditions, underscoring potential for long-term sustainable applications. These findings highlight synergistic advantages MOF, making promising candidate efficient stable treatment.

Language: Английский

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Adsorption Performance of Fe2O3-Modified Dolomite Composite (DFC) for Congo Red Removal

Water, Journal Year: 2025, Volume and Issue: 17(8), P. 1198 - 1198

Published: April 16, 2025

Printing and dyeing wastewater is known for its high color intensity, complex composition, low biodegradability, making treatment a significant challenge in environmental protection. Dolomite natural mineral with abundant reserves can be effectively used as an adsorbent carrier. In this study, the dolomite loaded by Fe2O3 composites (DFC) was synthesized systematically characterized using XRD, SEM, TEM, BET, XPS, IR to evaluate structural surface properties. The adsorption performance of DFC on Congo Red (CR) then investigated. maximum amount CR 3790.06 mg⋅g−1, removal rate still stable at 97% after five cycles test, which demonstrated that exhibited exceptional efficacy regeneration capability. Fe3+ beneficial improve effect DFC. addition, type adsorption, kinetic calculations were performed, indicated Weber–Morris diffusion modeling study showed behavior influenced interplay many mechanisms. offers innovative method efficient utilization creating renewable materials dye remediation.

Language: Английский

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