An investigation of the mechanical properties and adsorption potentials of Fe2O3@SiO2-L-cysteine-cellulose system

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: March 11, 2025

In this study, the Fe2O3@SiO2-L-cysteine-cellulose system was synthesized and characterized through XRD, FT-IR, EDS, TGA-DTA analyses. This system's adsorption performance evaluated for removing heavy metals such as Cr, Cd, Ni, Pb from synthetic wastewater. The magnetic core demonstrated a beneficial effect on enhancing metal capacity of polymer, while properties facilitated recyclability adsorbent. Cr(VI), Cd(II), Ni(II), Pb(II) ions explored under varying conditions pH, temperature, ion concentration, adsorbent dosage. Maximum capacities were recorded at 423.56 mg/g, 426.32 422.21 respectively, optimal pH 6.5, concentration 600 mg/L, an dose 0.07 g, room temperature. Additionally, material water, N2, CO2 assessed. exhibited excellent removal efficiency Cr(VI) (˃98%) initial 90 mg/L using g combination Fe2O3@SiO2, L-cysteine, cellulose in one performs distinct advantages enhanced surface area adsorbent, preventing degradation harsh conditions, separation reusability

Language: Английский

Synthesis of furan-2-ones and spiro[furan-2,3ʹ-indoline] derivatives using polyether sulfone sulfamic acid catalysis

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 29, 2024

Abstract Polyether sulfone sulfamic acid (PES-NHSO 3 H) was prepared by simple sulfonation of a modified polyether sulfone. The number acidic sites (SO determined to be 4.23 mmol H + /g acid-base titration and 4.29 barium sulfate test. PES-NHSO used as an efficient catalytic system for the preparation functionalized furan-2-ones 2ʹ,5-dioxo-5 H-spiro[furan-2,3 ʹ -indoline]-3-carboxylate derivatives via three-component reaction anilines, aldehydes/1-ethylindoline-2,3-dione, diethyl acetylene dicarboxylate in high yields (85–97%). effect polar non-polar solvents on productivity investigated. catalyst recovered 11 times without losses potential.

Language: Английский