Abstract
Poly(glycidyl methacrylate-t-N-methyl-d-glucamine) (P(GMA-t-NMDG)) functionalized polyacrylonitrile (PAN) nanofibers were prepared via electrospinning followed by surface modification. The functionalized PAN nanofiber mat was used for boric acid removal from aqueous solutions. Attenuated total reflections Fourier transform infrared (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS) results confirmed the presence of vicinal polyalcohol groups on the surface of these nanofibers. Surface morphology of PAN-P(GMA-t-NMDG) nanofiber mat was studied by SEM. The analysis results from inductively coupled plasma mass spectrometry show that the boron adsorption process is pH-dependent with a maximum adsorption removal ratio at a pH value of 6.0–7.0. The as-functionalized PAN-P(GMA-t-NMDG) nanofiber mat is very effective for boric acid removal at extremely low concentrations which may find the potential application for further boric acid removal from the RO permeates. Meanwhile, the PAN-P(GMA-t-NMDG) nanofiber mat also demonstrates outstanding reusability.
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