چكيده به لاتين
In this research, we studied chitosan/activated carbon nanocomposites prepared from shrimp shell and cellulose industrial wastes using zero-valent iron nanoparticles modified to remove three organic pollutants: phenol,
2-chlorophenol and 2,4-dichlorophenol. The structure and properties were characterized by FT-IR, BET, SEM, EDAX and XRD analyses. The assessment of adsorption demonstrates that the adsorption capacity of phenol, 2-chlorophenol and 2,4-dichlorophenol were 54.67, 80.20 and 79.08 ((mg)⁄g), respectively. After adding H_2 O_2, the removal efficiency for Fenton oxidation of phenol,
2-chlorophenol and 2,4-dichlorophenol were attained %97.76, %98.99 and %99 at optimum conditions, respectively. The impact of initial concentration, contact time, nanocomposite dosage, pH, oxidant dosage and temperature were examined for adsorption and Fenton oxidation.
The Langmuir, Freundlich and Harkins-Jura isotherms were investigated for adsorption phenol, 2-chlorophenol and 2,4-dichlorophenol and were conformed perfectly to Freundlich isotherm. The kinetic investigation of pseudo-first, pseudo-second and intra particle diffusion models proved the conformance to intra particle diffusion for adsorption of phenol and 2,4-dichlorophenol although adsorption of 2-chlorophenol complied with the pseudo-first model, well.
Kinetic and thermodynamic were perused. Fenton oxidation were conformed first kinetic model, In addition occurs spontaneously.
