膨润土负载壳聚糖吸附镍离子研究

A Study on Nickel Ions Adsorbed by Chitosan Loaded Bentonite

将壳聚糖负载在膨润土上,得到一种复合吸附剂,并利用其进行含Ni2+废水吸附试验,当吸附剂质量为0．5 g,在最佳条件下对初始质量浓度为10 mg／L的含Ni2+废水去除率达到99％左右。傅立叶变换红外光谱研究表明,吸附过程中Ni2+取代了膨润土中的金属离子,其中含有的少量壳聚糖也参与了反应,反应位置为氨基。

A composite adsorbent, Chitosan Loaded Bentonite （CLB）, is obtained by loading chitosan on the bentonite. The adsorbent has exhibited good efficiency in the adsorption experiment of Ni^2＋. According to the experiment results, when the mass of CLB is 0.5 g and the initial concentration of Ni^2＋ 10 mg/L, the removal ratio of Ni^2＋ comes up to 99% at the optimal conditions. FT-IR spectra show that Ni^2＋ has substituted the metal ions in the bentonite and the chitosan combined on the bentonite is also involved in the reaction at active site-NH2.