Adsorption and desorption of Cd(II) onto titanate nanotubes and efficient regeneration of tubular structures

► Satisfactory reuse of TNTs due to easy regeneration of tubular structures. ► TNTs regeneration using only 2% of NaOH needed for virgin TNTs preparation. ► Excellent regeneration attributed to steady TNTs skeleton and complex form of TNTs-OCd+OH− onto adsorbed TNTs.