Phosphine-functionalized electrospun poly(vinyl alcohol)/silica nanofibers as highly effective adsorbent for removal of aqueous manganese and nickel ions

- Phosphine groups were successfully incorporated into silica network structure.
- pgf-PVA/SiO2 composite exhibited excellent adsorption capacities.
- Adsorption of Mn+2 and Ni+2 ions on composite occurred through coordinate bond.
- Simple acid treatment was used for successful regeneration of adsorbent.