AI Article Synopsis
- The study explored the effectiveness of electrospun CA/chitosan/SWCNT/FeO/TiO nanofibers in removing pollutants like Cr(VI), As(V), Methylene blue, and Congo red from water through adsorption and photocatalytic reduction.
- The synthesis and properties of these nanofibers were analyzed using techniques such as TEM, SEM, and FTIR, while factors like pH and contact time were tested to optimize adsorption efficiency.
- Results showed that the nanofibers are more effective for removing lower concentrations of Cr(VI) and As(V) through adsorption, whereas photocatalytic reduction is better for higher concentrations of these metals and for dye degradation.
Article Abstract
The potential of electrospun cellulose acetate/chitosan/single walled carbon nanotubes/ferrite/titanium dioxide (CA/chitosan/SWCNT/FeO/TiO) nanofibers was investigated for the removal of Cr(VI), As(V), Methylene blue and Congo red from aqueous solutions via the adsorption and photocatalytic reduction processes. The properties of synthesized SWCNT/FeO/TiO and fibers were characterized using TEM, SEM, FTIR, XRD, TGA and BET analysis. In adsorption process, the influence of adsorbent type including SWCNT to FeO ratio, TiO to SWCNT/FeO ratio and SWCNT/FeO/TiO concentration as well as the adsorption parameters including pH, contact time, and initial concentration of adsorbates on the Cr(VI), As(V), Methylene blue and Congo red adsorption in a batch mode was investigated. The reusability of nanofibers was also investigated for five adsorption-desorption cycles. The photocatalytic reduction of Cr(VI), As(V), Methylene blue and Congo red was also investigated using various nanofibrous catalysts. The obtained results indicated that the removal of Cr(VI) and As(V) using CA/chitosan/SWCNT/FeO/TiO nanofibrous adsorbent via adsorption process could be preferred for the lower concentrations of metal ions. The photocatalytic reduction was an effective method for the Cr(VI), As(V) removal at higher concentrations and degradation of Methylene blue and Congo red under both lower and higher concentrations of azo dyes.
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| http://dx.doi.org/10.1016/j.ijbiomac.2019.08.214 | DOI Listing |
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