Carboxymethyl cellulose coated Fe3O4@SiO2 core–shell magnetic nanoparticles for methylene blue removal: equilibrium, kinetic, and thermodynamic studies
Fe3O4@SiO2 core–shell magnetic nanoparticles (MNPs) were prepared by chemical coprecipitation of FeCl3·6H2O and FeCl2·4H2O in alkaline solution, followed by silylation using triethoxy silane, and then by treatment with 3-aminopropyltriethoxysilane. The corresponding MNPs were coated with carboxymethyl cellulose (CMC) by amide formation between carboxyl groups of CMC and amine functional groups of nanoparticles. The structure of MNPs was characterized by FT-IR, SEM, EDX, TEM, XRD, VSM and TGA analysis. CMC-coated Fe3O4@SiO2 magnetic nanoparticles were used as an efficient adsorbent for the removal of methylene blue (MB, a cationic dye) from aqueous solutions. The impact of various factors such as adsorbent dosage, pH, initial concentration of MB, temperature and contact time were investigated. The kinetic, isotherms, and thermodynamic parameters of adsorption were also studied.
KeywordsFe3O4@SiO2 Magnetic nanoparticles Carboxymethyl cellulose Methylene blue adsorption Isotherms Kinetic
We are grateful to the Payame Noor University for financial support. B. E-S thanks the Iran Science Elites Federation (ISEF).
- Azari A, Gholami M, Torkshavand Z, Yari A, Ahmadi E, Kakavandi B (2015) Evaluation of basic violet 16 adsorption from aqueous solution by magnetic zero valent iron-activated carbon nanocomposite using response surface method: isotherm and kinetic studies. J Mazandaran Univ Med Sci 24:333–347Google Scholar
- Baghapour MA, Djahed B, Ranjbar M (2013) Removal of methylene blue from aqueous solutions by waste paper derived activated carbon. J Health Sci Surveill Syst 1:48–56Google Scholar
- Mahdavinia GR, Baghban A, Zorofi S, Massoudi A (2014) Kappa-carrageenan biopolymer-based nanocomposite hydrogel and adsorption of methylene blue cationic dye from water. J Mater Environ Sci 5:330–337Google Scholar
- Quy DV et al (2013) Synthesis of silica-coated magnetic nanoparticles and application in the detection of pathogenic viruses. J Nanomater 2013. https://doi.org/10.1155/2013/603940