Fe-based ceramic nanocomposite membranes fabricated via e-spinning and vacuum filtration for Cd2+ ions removal

Jie Wu; Songbai Xue; Denzel Bridges; Yongchao Yu; Linyue Zhang; Joshi Pooran; Curtis Hill; Jayne Wu; Anming Hu

doi:10.1016/j.chemosphere.2019.05.084

Fe-based ceramic nanocomposite membranes fabricated via e-spinning and vacuum filtration for Cd²⁺ ions removal

Chemosphere. 2019 Sep:230:527-535. doi: 10.1016/j.chemosphere.2019.05.084. Epub 2019 May 16.

Authors

Jie Wu¹, Songbai Xue², Denzel Bridges³, Yongchao Yu³, Linyue Zhang³, Joshi Pooran⁴, Curtis Hill⁵, Jayne Wu⁶, Anming Hu⁷

Affiliations

¹ College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China; Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee Knoxville, 1512 Middle Drive, Knoxville, TN, 37996, USA.
² College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, People's Republic of China.
³ Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee Knoxville, 1512 Middle Drive, Knoxville, TN, 37996, USA.
⁴ Oak Ridge National Lab, Oak Ridge, TN37831, USA.
⁵ Marshall Space Flight Center, National Aeronautics and Space Administration, AL, 35812, USA.
⁶ Department of Electrical Engineering and Computer Science, University of Tennessee Knoxville, 1520 Middle Drive, Knoxville, TN, 37996, USA.
⁷ Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee Knoxville, 1512 Middle Drive, Knoxville, TN, 37996, USA. Electronic address: ahu3@utk.edu.

PMID: 31125881
DOI: 10.1016/j.chemosphere.2019.05.084

Abstract

In this work, vacuum filtered and polymer mixed e-spinning membranes (ESPMs) made from or doped with Fe-based nanomaterials were successfully fabricated to remove Cd²⁺ ions from a neutral aqueous solution. The used Fe-based nanomaterials including FeOOH precursor Nanowires (NWs), α-Fe₂O₃ NWs and Fe₃O₄ nanoparticles (NPs) were synthesized by elevating the hydrothermal reaction temperature from 250 °C to 500 °C or doing post-heating treatment. The adsorption results showed that vacuum filtered membranes (VFMs) overall performed a better Cd²⁺ ions removal behavior than e-spinning ones. Among them, VFM made from Fe₃O₄ NPs has the highest adsorption capacity (qt) with the adsorption amount of Cd²⁺ ions reaching about 29.3 mg/g within only 2 min due to the high specific surface area of NPs. Models of pseudo-first-order, pseudo-second-order and intraparticle diffusion were used to study the kinetics of Cd²⁺ ions removal process, and a high correlation coefficient (R²) of 0.99 was obtained when pseudo-second-order model was used. It was calculated that the equilibrium rate constant of VFM made from Fe₃O₄ NPs has reached about 0.28 g mg^-1 min^-1, much smaller than those of other membranes, which indicated a high Cd²⁺ ions removal efficiency.

Keywords: Adsorption kinetics; Cd(2+) ions removal; Fe-based ceramic nanomaterials; Membrane.

MeSH terms

Adsorption
Cadmium / analysis*
Ceramics / chemistry*
Diffusion
Ferrosoferric Oxide / chemistry*
Filtration / methods*
Membranes, Artificial
Models, Theoretical
Nanocomposites / chemistry*
Vacuum
Water Pollutants, Chemical / analysis*
Water Purification / methods*

Substances

Membranes, Artificial
Water Pollutants, Chemical
Cadmium
Ferrosoferric Oxide