Arsenate adsorption onto Fe-TNTs prepared by a novel water-ethanol hydrothermal method: Mechanism and synergistic effect

- A new adsorbent Fe-TNTs was prepared by one-step water-ethanol hydrothermal method.
- High As(V) removal efficiency was achieved with unique advantages at acidic conditions.
- Synergistic effect through increased point of zero charge and extra adsorption sites.
- Complex formed by -OH groups on Fe-TNTs surface was main mechanism.
- Excellent adsorption performance of the desorbed Fe-TNTs after three reuse cycles.