Ordered mesoporous silica to the rescue: A potential anti-contamination ally for pesticide capture in soil

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: 715, P. 136634 - 136634

Published: March 18, 2025

Language: Английский

Simultaneous Adsorption of Ampicillin and Lead by a Highly Stable UiO-66-NH₂/TiO₂ Nanocomposite from Water: Mechanism, Kinetics, Equilibrium, Thermodynamics, and Regeneration Studies

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(46), P. 20343 - 20355

Published: Nov. 11, 2024

A zirconium-based metal–organic framework (UiO-66-NH2) was fabricated, which then hybridized with TiO2. The synthesized adsorbent utilized for the adsorption of ampicillin (AMP) and lead (Pb(II)) from an aqueous solution. main characterization analyses including Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), N2 adsorption/desorption isotherms, thermogravimetry (TG), energy-dispersive spectroscopy (EDS), elemental mapping, transmission electron microscopy (TEM), field-emission scanning (FESEM), water contact angle, XPS affirmed correctness synthesis. nanocomposite UiO-66-NH2/TiO2 had a high crystallinity, surface area (1050 m2/g), stability up to 600 °C. Adsorption experiments were performed explore different parameters affecting adsorption. results revealed fast kinetics this adsorbent. majority AMP Pb(II) adsorbed in 30 min, pseudo-second-order kinetic model better agreement empirical data (R2 ≥ 0.993). Furthermore, Langmuir isotherm 0.987) fitted compared Freundlich 0.920). maximum capacity 625.7 mg/g gained 769.2 (pH 7 ± 0.1 T = 300 1 K), 1.3 1.5 times greater, pristine UiO-66-NH2. thermodynamic study demonstrated that process AMP/Pb(II) by is spontaneous exothermic. allocated area, large number active sites, hydrogen bonding, hydrophobic forces, electrostatic interactions, π–π interactions. Finally, acceptable reusability five regeneration cycles. With its sustainable easy fabrication, remarkable performance, excellent capability, emerges as highly effective industrial wastewater treatment applications.

Language: Английский

Self-assembly of ZnO-Biochar/Kaolinite/Chitosan/GO with 1D/2D/3D heterojunctions for enhanced removal of estrogens and triclosan in water

BMC Chemistry, Journal Year: 2024, Volume and Issue: 18(1)

Published: Dec. 18, 2024

This Study focuses on the preparation of sustainable and efficient Chitosan catalyst for removal three organic pollutants, 17β-Estradiol (E2), 17α-ethynyl estradiol (EE2) triclosan (TCS) from water. The prepared nanocomposites were characterized by different techniques which confirmed presence key components Chitosan, Carica Papaya seed Kaolinite. optical characterization proved nanocomposite is photoactive with a band gap 1.81 eV 1.77 Chitosan/kaolinite biochar (CS/KBC) biochar/GO (CS/KBC/GO) respectively, confirming ability to be active in visible light region spectrum. degradation experiment using CS/KBC/GO was observed better 100% 5 mg/L E2 EE2 over 60 min 97.8% 120 10 TCS at optimum conditions (pH 3 E2, pH 7). It that superoxide radical played major role contaminants. Furthermore, four cycles without any decrease performance, rules out question deactivation proving sustainability catalyst. toxicity test shows water safe as it does not harm cerio daphnia silvestrii organism.; efficiently removed micropollutants real-life waste samples performance very good slight wastewater due complex matrix sample competes site.

Language: Английский