chemengineering Article Kinetic Studies of Cs+ and Sr2+ Ion Exchange Using Clinoptilolite in Static Columns and an Agitated Tubular Reactor (ATR) Muhammad Yusuf Prajitno 1,* , Mohamad Taufiqurrakhman 2 , David Harbottle 1 and Timothy N. Hunter 1,* 1 School of Chemical and Process Engineering,...