乙二胺四乙酸（EDTA）改性磁性壳聚糖对Cd2+的吸附性能

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文章编号： 1672-6987（2021）02-0058-08； DOI： 10.16351/j.1672-6987.2021.02.008

于硕， 吴占超*, 匡少平*(青岛科技大学 化学与分子工程学院，山东 青岛 266042)

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Cd2+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。

关键词： 磁性壳聚糖； 乙二胺四乙酸（EDTA）; Cd2+； 吸附

中图分类号： O 646.8文献标志码： A

引用格式： 于硕， 吴占超, 匡少平. 乙二胺四乙酸（EDTA）改性磁性壳聚糖对Cd2+的吸附性能［J］. 青岛科技大学学报(自然科学版), 2021, 42(2): 58-65.

YU Shuo, WU Zhanchao, KUANG Shaoping. Adsorption properties of ethylenediamine tetraacetic acid (EDTA) modified magnetic chitosan for Cd2+［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2021， 42(2)： 58-65.

Adsorption Properties of Ethylenediamine Tetraacetic Acid (EDTA)

Modified Magnetic Chitosan for Cd2+

YU Shuo, WU Zhanchao, KUANG Shaoping

(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)

Abstract: 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 Cd2+ 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.

Key words: magnetic chitosan; ethylenediamine tetraacetic acid （EDTA）; Cd2+; adsorption

收稿日期： 2020-04-10

基金项目： 国家自然科学基金项目(41673112).

作者简介： 于硕（1995—），男，硕士研究生. *通信联系人.