Multiamine-Grafted magnetic nanocatchers for enhanced removal of chlortetracycline from aqueous solution

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160051 - 160051

Published: Jan. 1, 2025

Language: Английский

Environmentally Sustainable Hydrous Zirconium Oxide–Inulin as an Efficient Adsorbent for Ciprofloxacin Removal: Mechanistic and Thermodynamic Insights via Statistical Physics and Fractal-like Kinetic Modeling

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

Published: May 7, 2025

Pharmaceutical pollutants like ciprofloxacin (CPF) pose environmental risks due to their persistence and limited removal by conventional treatment methods. To address this, a hydrous zirconium oxide-inulin (HZO-inulin) biomaterial was synthesized via wet precipitation characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction, thermogravimetric analysis-difference thermal analysis, photoelectron spectroscopy, Brunauer-Emmett-Teller surface area scanning electron microscopy-energy dispersive transmission microscopy. HZO-inulin exhibited high chemical stability under various aquatic conditions. CPF adsorption optimized the Box-Behnken design with desirability function approach, achieving 99.28% maximum capacity of 181.46 mg/g optimal conditions (adsorbent dose = 0.01 g, concentration 85 mg/L, contact time 35 min). Isotherm analysis classical statistical physics models revealed that Freundlich model best fit data, suggesting multilayer adsorption, while 2 indicated monolayer two energy levels (R2 0.9994-0.9997). Adsorption energies (E1: 28.65-38.62 kJ/mol, E2: 42.58-54.87 kJ/mol) suggested hydrogen bonding electrostatic interactions. Thermodynamic studies confirmed spontaneous endothermic adsorption. Kinetic at 300 K for concentrations (55, 65, 75 mg/L) followed fractal-like pseudo-second-order > 0.998), diffusion modeling identified boundary-layer dominance, transitioning intraparticle diffusion. from real water samples 98.9% (tap water), 99.10% (river 99.15% (wastewater). retained efficiency after eight cycles, confirming its reusability. These findings establish as an efficient, stable, sustainable material purification applications.

Language: Английский

Defect-regulated and amino-functionalized UiO-67 for efficient removal of tetracycline hydrochloride from aqueous solutions

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 1, 2024

Language: Английский