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Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles
Author(s) -
Mohammadi Galangash Mohsen,
Ghavidast Atefeh,
Bozorgpanah Zahra
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800177
Subject(s) - chemistry , adsorption , dendrimer , aqueous solution , enthalpy , langmuir , fourier transform infrared spectroscopy , langmuir adsorption model , freundlich equation , nanoparticle , gibbs free energy , magnetic nanoparticles , nuclear chemistry , transmission electron microscopy , inorganic chemistry , analytical chemistry (journal) , chemical engineering , organic chemistry , thermodynamics , engineering , physics
The adsorption of the dyes Acid Red 114 and Reactive Black 5 in aqueous solutions on polyhydroxyl dendrimer magnetic nanoparticles (Fe 3 O 4 @SiO 2 ‐TRIS) was studied in a batch system. The Fe 3 O 4 @SiO 2 ‐TRIS NPs were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and transmission electron microscopy. Experiments were performed under different conditions such as the initial dye concentration, adsorbent dose, and pH. The pseudo‐second‐order model provided a very good fit for the two anionic dyes. The Langmuir and Freundlich adsorption models were used to describe the equilibrium isotherms at different temperatures, and the former agreed very well with the experimental data. However, the adsorption capacity of Fe 3 O 4 @SiO 2 ‐TRIS NPs was reduced during surface modification, which could be due to the dye occupying the binding sites of the dendrimer. Thermodynamic parameters, namely the change in free energy (Δ G 0 ), enthalpy (Δ H 0 ), and entropy (ΔS 0 ), were also determined.