漆酚-喔星聚合物对Cd^(2+)的吸附性能

Adsorption Properties of Urushiol-Oxine Polymer for Cd^(2+)

研究了漆酚-喔星聚合物吸附Cd2+的动力学和热力学特性.结果表明,漆酚-喔星聚合物对Cd2+的吸附既符合Langm iur吸附模型也符合Freund lich吸附模型,吸附等温线与Langm iur方程和Freund lich方程均高度相关.在25℃,Langm iur吸附系数a=63.2 L.mol-1,饱和吸附量Qm=122mg.g-1;Freund lich吸附常数n=2.77,K=272;Langm iur吸附表观速率常数k=1.10 h-1.

The kinetic and thermodynamic characteristics of adsorption of umshiol- oxine polymer were systematically studied for Cd^2＋ . The thermodynamics showed that the adsorption isotherm could be described by the Langmuir equation and Freundlich equation respectively. At the temperature of 25℃ ,the Langmuir adsorption coefficient and the saturation adsorption quantity were a = 63.2 L ·mol^-1, Qm= 122 mg·g-^1 respectively. Freundlich adsorption constant was n =2. 77 ,K =272. The kinetics indicated that the Langmuir apparent rate constant was k = 1. 10 h^-1.