载氨基吸附材料制备及其分离锌离子的研究

Preparation of Adsorbents Loaded with Amino Groups for the Separation of Zinc Ions

关作鹏 ¹赵方波¹

扫码查看

作者信息

1. 哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨 150000
折叠

摘要

以亚氨基二乙酸螯合树脂(CH90)为基体,利用聚多巴胺(PDA)作为交联剂,将聚乙烯亚胺(PEI)接枝到基体表面上,制备了一种对锌离子同时具有高吸附和易再生特点的新型改性树脂(CH90-PDA-PEI),并对其进行了一系列的表征和测试.结果表明,与传统的阴离子交换树脂(717)相比,在278 K时,CH90-PDA-PEI对Zn(Ⅱ)的最大吸附量为160.4 mg/g,选择性分离因子为159.31.在使用实际钢厂废水进行动态吸附测试时,CH90-PDA-PEI的吸附性能相比717树脂提升了26.9％,而再生时用水量减少了6.7％,且在循环测试时可以保持稳定的性能.

Abstract

A novel modified resin(CH90-PDA-PEI)with high zinc ion adsorption capacity and easy regeneration was prepared using iminodiacetic acid chelating resin(CH90)as the matrix,polydopamine(PDA)as the crosslinking agent,and by grafting polyethyleneimine(PEI)onto the surface of the matrix.A series of characterizations and tests were conducted.The results show that,compared with traditional anion exchange resin(717),at 278 K,CH90-PDA-PEI exhibits a maximum zinc(Ⅱ)adsorption capacity of 160.4 mg/g and a selective separation factor of 159.31.In dynamic adsorption tests using real steel mill wastewater,the adsorption performance of CH90-PDA-PEI increased by 26.9％ compared to that of 717 resin,while water consumption during regeneration was reduced by 6.7％ .Additionally,CH90-PDA-PEI maintained stable performance during cycling tests.

关键词

聚多巴胺/聚乙烯亚胺/共交联/Zn(Ⅱ)/Fe(Ⅱ)分离/Zn(Ⅱ)的吸附

Key words

polydopamine/polyethylenimine/co-crosslinking/separation of Zn(Ⅱ)/Fe(Ⅱ)/adsorption of Zn(Ⅱ)

引用本文复制引用

出版年

2025

水处理技术

杭州水处理技术研究开发中心有限公司

水处理技术

北大核心

影响因子：0.731

ISSN：1000-3770

段落导航