膨润土对苯并三氮唑与Cu^(2+)的吸附行为研究

Adsorption for BTA and Cu^(2+) with bentonite

以膨润土对含苯并三氮唑(BTA)和Cu2+的模拟废水进行吸附研究。结果表明:膨润土吸附BTA的最佳pH为3.5,对Cu2+的吸附率随pH升高而增大;pH为3.5时,对BTA、Cu2+的最大吸附率分别达到92.1%、40.3%;膨润土对100 mg/L BTA和Cu2+溶液的饱和吸附量分别为81.3、22.9 mg/g,吸附平衡时间为80～100 min。动力学拟合表明,吸附过程能用Freundlich和Langmuir吸附等温方程描述。

The adsorption capability of bentonite for BTA and Cu2＋ has been researched. The results show that the optimum pH of bentonite adsorption effect on BTA is 3.5, and Cu2＋ adsorption rate increases with the increase of pH. When the pH is 3.5 ,the BTA and Cu2＋ adsorption rates by using bentonite are 92.1% and 40.3% ,respectively. The saturated adsorption capacity of bentonite for 100 mg/L BTA and Cu2＋ solution are 81.3 mg/g and 22.9 mg/g respec- tively. The time of equilibrium adsorption is 80-100 min. The kinetics fitting shows that the adsorption process can be described by Freundlich and Langmuir adsorption isothermal equation.