Adsorption of cationic dyes onto Fe@graphite core–shell magnetic nanocomposite: Equilibrium, kinetics and thermodynamics
PBN-AR
Instytucja
Wydział Technologii i Inżynierii Chemicznej (Zachodniopomorski Uniwersytet Technologiczny w Szczecinie)
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
CHEMICAL ENGINEERING RESEARCH & DESIGN (30pkt w roku publikacji)
ISSN
0263-8762
EISSN
Wydawca
INST CHEMICAL ENGINEERS
DOI
URL
Rok publikacji
2018
Numer zeszytu
Strony od-do
259-270
Numer tomu
129
Identyfikator DOI
Liczba arkuszy
Słowa kluczowe
angielski
cationic dyes
nanocomposite
adsorption
kinetics
thermodynamics
Streszczenia
Język
angielski
Treść
Magnetically separable Fe@graphite core–shell nanocomposite particles (Fe@G) were synthesized by chemical vapor deposition CVD process and characterized by XRD, HRTEM, HAADF-STEM, FTIR, Raman spectroscopy, BET and zeta potential measurements. Nanocomposite was used to adsorb two cationic dyes, Basic Yellow 28 (BY28) and Basic Red 46 (BR46), from aqueous solutions. Adsorption process was investigated under different experimental conditions of pH (3–11), initial dye concentration (10–50 mg L−1) and temperature (20–60 °C). The adsorption kinetics were examined using pseudo-first-order, pseudo-second-order and intraparticle diffusion model. The equilibrium adsorption data were analyzed by Langmuir, Freundlich and Temkin isotherm models. The results revealed that the pseudo-second-order model and Langmuir isotherm fit the kinetics and equilibrium data, respectively. In addition, various thermodynamic parameters, such as change in free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°), were also calculated. The thermodynamic analysis showed that the adsorption of BY28 and BR46 was spontaneous and endothermic.
Inne
System-identifier
PANEL-1009001
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