Abstract

Removal of hexavalent chromium Cr (VI) from water is a key problem in environmental remediation due to its high toxicity. In this work, a special sol of iron alkoxide was first prepared and added into a polymer (thermal plastic elastomer ester (TPEE)) solution to form the electrospinning precursor, then for the first time, hierarchically nanofibrous membrane was fabricated by electrospinning technique combined with hydrothermal strategy. The synthesized membrane exhibited high efficiency for the removal of Cr (VI) from water. X-ray diffraction (XRD) and scanning electron microscopy (SEM) revealed that the resulting nanofibrous membrane posses high crystallinity as well as hierarchical structure. The controlled experiments results and X-ray photoelectron spectroscopy (XPS) characterization indicated that the Cr (VI) removal ability of the membrane was mainly attributed to the adsorption and reduction of Cr (VI)–Cr (III), which is much less toxic, because of the hierarchical structure and the exposed iron oxide active sites. The research of adsorption isotherm suggested that the adsorption of Cr onto the membrane was Freundlich adsorption, which further displayed that the main Cr (VI) removal was attributed to the reduction of Cr (VI)–Cr (III). Therefore, this study provides a promising hierarchically nanostructured membrane with desirable Cr (VI) removal ability and easy solid–liquid separation property.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.