Adsorption of cationic organic dyes from aqueous solutions by sulfonated covalent organic frameworks: Characterization and mechanistic explanations

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132466 - 132466

Published: March 1, 2025

Language: Английский

Adsorption Performance and Mechanism of Waste Myriophyllum aquaticum Biochar for Malachite Green in Wastewater: Batch and Column Studies

Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 2868 - 2868

Published: March 24, 2025

The indiscriminate discharge of common dyes, such as malachite green (MG), poses significant risks to water quality and human health. To address this issue, a biochar (MBC) was synthesized from waste Myriophyllum aquaticum biomass (MAB) further activated with KOH produce micro-mesoporous (KMBC) enhanced adsorption efficiency. Characterization results demonstrated that KMBC exhibits higher specific surface area (1632.7 m2/g) larger pore volume (0.759 cm3/g) compared MBC. Batch experiments revealed the process follows pseudo-second-order kinetics Langmuir isotherm model, theoretical maximum capacities MBC reaching 1772.3 mg/g 2570.7 mg/g, respectively is spontaneous, endothermic, entropy-driven process. Key mechanisms involved in include hydrogen bonding, hydrophobic interactions, complexation. Due electrostatic attraction, selective confirmed can effectively separate cationic dyes MG mixed anionic-cationic systems. Dynamic showed breakthrough curve data fit well Thomas model. In summary, MAB-derived demonstrates potential for practical applications treatment MG-contaminated wastewater.

Language: Английский

A rapid on-site fluorescence sensing platform for malachite green in an aqueous phase based on lanthanide-functionalized MOF

Microchimica Acta, Journal Year: 2025, Volume and Issue: 192(4)

Published: March 25, 2025

Language: Английский