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Production of magnetic chitinous microcages from ephippia of zooplankton Daphnia longispina and heavy metal removal studies
- Sargin, Idris, Arslan, Gulsin, Kaya, Murat
- Carbohydrate polymers 2019 v.207 pp. 200-210
- Daphnia longispina, Fourier transform infrared spectroscopy, aqueous solutions, cadmium, chitin, chromium, copper, eggs, energy-dispersive X-ray analysis, heavy metals, magnetism, metal ions, nickel, scanning electron microscopy, sorption, thermogravimetry, zinc, zooplankton
- This is the first study on production of three dimensional chitinous microcages from ephippial eggs of a microcrustacean, Daphnia longispina (water flea) by keeping the original shape of its chitinous structure. Iron-based magnetic particles were successfully loaded into the chitinous microcages to enhance its heavy metal sorption capacity. The FT-IR, SEM-EDX and TGA analysis proved the purity of chitin and demonstrated that the loading of magnetic particles into the chitinous microcages was achieved. These newly obtained three-dimensional chitin microcages and magnetic particles loaded microcages were tested in Cd(II), Cr(III), Cu(II), Ni(II) and Zn(II) removal from aqueous solutions. Magnetic particles loaded microcages exhibited a better performance in removal of Cd(II), Cu(II) and Ni(II) ions; while unloaded microcages showed a higher affinity for Cr(III) and Zn(II). This study demonstrated that the chitin microcages are suitable carriers for iron-based magnetic particles. Here these new materials were studied only for removal of five heavy metal ions but these promising materials have a potential to be used in various fields.