乙二胺四乙酸(EDTA)改性磁性壳聚糖对Cd^(2+)的吸附性能  

Adsorption Properties of Ethylenediamine Tetraacetic Acid(EDTA)Modified Magnetic Chitosan for Cd^(2+)

作　　者：于硕 吴占超[1] 匡少平[1] YU Shuo;WU Zhanchao;KUANG Shaoping(College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学化学与分子工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2021年第2期58-65,共8页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(41673112).

摘　　要：成功制备了乙二胺四乙酸(EDTA)改性的磁性壳聚糖,并通过红外光谱,X射线衍射,热重分析和扫描电镜对其结构和形貌进行了表征。对吸附剂的吸附性能研究表明:在pH=5,T=298 K,ρ0=200 mg·L^(-1),t=30 min的吸附条件下,吸附剂对Cd^(2+)的饱和吸附量为176.32 mg·g^(-1)。吸附剂吸附行为符合二级动力学模型和Langmuir等温模型。吸附剂再生5次仍有较好的吸附性能。EDTA-modified magnetic chitosan was successfully prepared,and its structure and morphology were characterized by infrared spectroscopy,X-ray diffraction,thermogravimetric analysis,and scanning electron microscopy.The study on the adsorption performance of the adsorbent showed that the saturated adsorption capacity of the adsorbent for Cd^(2+)was 176.32 mg·g^(-1)under the adsorption conditions of pH=5,T=298 K,ρ0=200 mg·L^(-1)and t=30 min.The adsorption behavior of the adsorbent complies with the second-order kinetic model and the Langmuir isothermal model.The adsorbent still showed good adsorption property after the fifth regeneration cycle.

关 键 词：磁性壳聚糖 乙二胺四乙酸(EDTA) Cd^(2+) 吸附 

分 类 号：O646.8[理学—物理化学]