Magnetic removal of crystal violet from aqueous solutions using polysaccharide‐based magnetic nanocomposite hydrogels |
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| Authors: | Ali Pourjavadi Seyed Hassan Hosseini Farzad Seidi Rouhollah Soleyman |
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| Affiliation: | 1. Polymer Research Laboratory, Department of Chemistry, Sharif University of Technology, , Tehran, Iran;2. Department of chemistry, Sanandaj Branch, Islamic Azad University, , Sanandaj, Iran;3. Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), , Tehran, Iran |
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| Abstract: | Magnetic Fe3O4@SiO2 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 |
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| Keywords: | magnetic nanocomposite starch‐grafted acrylic acid crystal violet dye absorption and desorption |
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