Isotherm and thermodynamic studies of 2,4,6 Tichlorophenol onto newly adsorbents based zeolite as an efficient adsorbents

Autor: Mohd Hasbi Ab. Rahim, Atyaf Khalid Hameed, Mohd Ridzuan Nordin, Nugroho Dewayanto
Rok vydání: 2019
Předmět:
Zdroj: SN Applied Sciences. 1
ISSN: 2523-3971
2523-3963
DOI: 10.1007/s42452-019-0425-4
Popis: The aim of this study is to evaluate the adsorption efficiency of using zero valent iron supported on carbon-coated zeolite NZVI/SuZSM and zeolite NZVI/ZSM and as developed adsorbents for the removal of 2,4,6- Trichlorophenol (TCP) from aqueous solution. The characteristic of the adsorbents was conducted via XRD, BET (SBET), TGA, FTIR, FESEM-EDX, and TEM examination. In addition, the impact of different parameters such as contact time, initial concentration, pH and temperature were studied. The experimental data investigated by Langmuir and Freundlich adsorption isotherms and two models for kinetic studies of pseudo-first-order and pseudo-second-order models. The results indicated that the adsorption studies fitted well with Langmuir for the adsorbent NZVI/SuZSM and fitted well with Freundlich for the adsorbent NZVI/ZSM. In addition, both models fitted the data well but pseudo-second-order models more favorable with correlation values of R2 of 0.9995 and 0.9994 more than first order models for the adsorbents NZVI/ZSM and NZVI/SuZSM, respectively. The equilibrium time was achieved after 90 min for both adsorbents. Depending on the Langmuir model, the maximum adsorption capacities were 22.27 mg/g and 30.58 mg/g for NZVI/ZSM and NZVI/SuZSM, respectively at (27 °C ± 2). The thermodynamic parameters indicated that adsorption of TCP onto NZVI/ZSM was an endothermic and non-spontaneous process in temperature of 30 °C, while the adsorption of TCP onto NZVI/SuZSM was an endothermic and spontaneous process. The synthesize adsorbents (NZVI/ZSM and NZVI/SuZSM) could be applied as an efficient adsorbent for the removal of TCP from aqueous solution.
Databáze: OpenAIRE
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