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Magnetic removal of crystal violet from aqueous solutions using polysaccharide‐based magnetic nanocomposite hydrogels
Author(s) -
Pourjavadi Ali,
Hosseini Seyed Hassan,
Seidi Farzad,
Soleyman Rouhollah
Publication year - 2013
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4389
Subject(s) - nanocomposite , crystal violet , self healing hydrogels , aqueous solution , materials science , fourier transform infrared spectroscopy , chemical engineering , acrylic acid , scanning electron microscope , composite material , nuclear chemistry , analytical chemistry (journal) , polymer chemistry , polymer , chemistry , copolymer , chromatography , organic chemistry , medicine , pathology , engineering
Magnetic Fe 3 O 4 @ SiO 2 starch‐ graft ‐poly(acrylic acid) ( SPAA ) nanocomposite hydrogels were prepared and used as absorbents for removal of crystal violet from aqueous solutions. Dynamic swelling, effect of contact time, absorption kinetics and nanocomposite hydrogel mass for removal of crystal violet dyes from aqueous solutions were studied. Fourier transform infrared spectroscopy, scanning electron microscopy and vibrating sample magnetometer measurements were used for the characterization of the nanocomposite hydrogels. The nanocomposite hydrogels had high magnetic sensitivity under an external magnetic field, which allowed their magnetic separation from water, thus avoiding secondary pollution. The results obtained are very promising since: (i) high levels of colour removal (>85%) were achieved with low magnetic SPAA nanocomposite mass and (ii) the magnetic SPAA nanocomposites can be successfully used several times as absorbents of crystal violet in aqueous solution without needing filtration. © 2012 Society of Chemical Industry