Miss Layla Hosseini

In the present study, the chitosan/MWCNT/Fe3O4 composite nanofibrous adsorbent was fabricated by electrospinning process and its application for the removal efficiency of Cr (VI) ions from aqueous solutions was investigated. The prepared nanofibers were characterized using XRD, FTIR, SEM and TEM analysis. The effects of sorption parameters such as contact time, initial concentration and temperature were evaluated in a batch system. The kinetic and equilibrium data were well described by pseudo-second-order kinetic and Langmuir isotherm models. The spontaneous and endothermic nature of Cr (VI) sorption by the chitosan/MWCNT/Fe3O4 nanofibrous adsorbent was achieved. In fixed bed column studies, the Cr (VI) sorption capacity was increased by increasing the flow rate up to 4 mL min-1. Thomas model was well predicted the adsorption capacity of Cr (VI) by the chitosan/MWCNTs/Fe3O4 nanofibers in a fixed bed column. The removal efficiency of Cr (VI) ions by the regenerated nanofibers, did not significantly change in both batch and fixed-bed column studies. The results showed the high potential of chitosan/MWCNTs/Fe3O4 nanofibers for the removal of Cr (VI) ions from water and wastewater.

The efficient delivery of daunorubicin loaded poly (lactic acid) (PLA)/multiwalled carbon nanotubes (MWCNT)/Fe3O4 composite nanofibers was investigated. The synthesized nanofibers were characterized using SEM, TEM, and XRD analysis. The proliferation inhibition effect of PLA/MWCNT/Fe3O4 nanofibrous scaffolds on leukemia K562 cell lines was investigated. The effect of nanofiber concentration on the daunorubicin delivery in the absence and presence of external magnetic field was also evaluated. The results indicated that the incorporation of daunorubicin into the prepared nanofibrous scaffold under applied magnetic field could have synergistic cytotoxic effect on leukemia cancer cells. The drug release mechanism followed the non-Fickian transport.