Abstract
With a severe leak of heavy metal pollution, a layered tin phosphate doped with Ti, SnXTi1-XP (x = 0.88, 0.72, 0.4, 0.11, 0.03), has been successfully synthesized by facile hydrothermal method in our recent work. Moreover, there are crucial factors to evaluate the adsorption effect of adsorbent, including x value, adsorbent dosage, adsorption time, initial concentration of Cu(II), temperature, pH and ion strength. The results have been shown that the removal effect of Cu(II) can reach 81.3% at the appropriate process conditions, and the Langmuir isotherm can fit the adsorption behavior of Sn0.72Ti0.28P on Cu(II), and the theoretical maximum adsorption capacity is 2.96 mg g−1. And the adsorption of Cu(II) by Sn0.72Ti0.28P is in accordance with the pseudo-second-order kinetic model compatibly. At last, in the desorption experiment, the adsorbed Sn0.72Ti0.28P is acid leaching in 3 mol L−1 nitric acid solution for 24 h, and the desorption efficiency can reach 96.4%.
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