Abstract: STUDY ON INTERACTIONS OF INORGANIC ION EXCHANGE MATERIAL α－ZrP，γ－ZrP WITH UOSONG YINJIE；ZHANG HUI；YANG QIAOLING；ZHAO AIMIN（Department of Modern Physics，Lanzhou University，Lanzhou 730000）ABSTRACT The α-zirconium phosphate（α-ZrP）and γ－zirconium phosphate（γ-Zrp）are prepared andtheir ion exchange properties are studied．The total exchange capacity of α-Zrp（Zr（HPO_4）_2H_2O）and γ－Zrp（Zr（HPO_4）_2·2H_2O）for Na~＋ determined by pH titration is 8．80mmol／g and3．80 mmol／g，respectively．It is found that is more preferably adsorbed byα－ZrP thanγ－ZrP，and the ion exchange of -H~+ on α－ZrP is reversible，but the distribution coefficient　of on α－ZrP decreases with decreasing pH Value.On the other hand，the γ－ZrP may be uscd　torecover in highly acidic medium. Key words α－ZrP γ－ZrP pH titration Ion exchange isotherm Thermodynamie function