Abstract:

The synthesis of AJS-02 modified by L-tyrosine acid and a comparison of adsorption-desorption performance toward Cu2+ between NDA-150 and AJS-02 were investigated. The results showed that equilibrium adsorption data fitted to Langmuir isotherms and the adsorption capacity is higher on AJS-02 thanon NDA-150 in our study, which may be attributed to the polar groups on the network of AJS-02. The adsorption of Cu2+ on AJS-02 is a procedure of the coexistence of physisorption and chemisorption. Kinetic analysis shows that the adsorption rate was mainly governed by film diffusion. Dynamic adsorption and desorption studies for Cu2+on AJS-02 show that the breakthrough adsorption capacity and the total adsorption capacity are 4.05×10-3 and 6.44×10-3 mmol per milliliter resin, respectively. Above 90% regeneration efficiency for the adsorbent was achieved by the desorption of 5% hydrochloric acid.

Key words: ＡＪＳ-０２，ＮＤＡ-１５０ｒｅｓｉｎ，Ｃｕ２＋，ａｄｓｏｒｐｔｉｏｎ，ｄｅｓｏｒｐｔｉｏ