聚乙烯亚胺(PEI)改性多孔膜动态吸附废水中的Co2+

doi:10.16085/j.issn.1000-6613.2017-0580

化工进展 ›› 2017, Vol. 36 ›› Issue (12): 4658-4663.DOI: 10.16085/j.issn.1000-6613.2017-0580

聚乙烯亚胺(PEI)改性多孔膜动态吸附废水中的Co²⁺

阮雪华¹, 徐燕¹, 周子渊¹, 廖绪行¹, 金丽丽¹, 鞠佳², 贺高红¹

1 大连理工大学石油与化学工程学院, 辽宁盘锦 124221;
2 辽宁石油化工大学化学化工与环境学部, 辽宁抚顺 113001

收稿日期:2017-04-05 修回日期:2017-06-15 出版日期:2017-12-05 发布日期:2017-12-05
通讯作者: 贺高红,教授,研究方向为膜科学与技术。
作者简介:阮雪华(1982-),男,讲师。
基金资助:
国家自然科学基金（21606035，21676043，21606120）及长江学者项目（T2012049）。

Dynamic adsorption of Co²⁺ from wastewater by polyethyleneimine(PEI)-grafted porous membranes

RUAN Xuehua¹, XU Yan¹, ZHOU Ziyuan¹, LIAO Xuhang¹, JIN Lili¹, JU Jia², HE Gaohong¹

1 School of Petroleum & Chemical Engineering, Dalian University of Technology, Panjin 124221, Liaoning, China;
2 College of Chemstry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, Liaoning, China

Received:2017-04-05 Revised:2017-06-15 Online:2017-12-05 Published:2017-12-05

摘要/Abstract

摘要： 膜吸附是废水中重金属离子捕集的一种新兴方法，但是现有的吸附性亲和膜多是通过静态吸附捕集重金属离子，吸附周期比较长，并且膜上的功能性材料在水溶液中长时间浸泡容易溶解脱落。本研究通过引入聚左旋多巴胺（PDOPA）为过渡层，在尼龙-6（PA-6）基膜上接枝聚乙烯亚胺（PEI），并用戊二醛固化交联PEI，制备了一种化学结构稳定、比表面积高、渗透性能好、可动态吸附重金属离子的亲和膜。改性后的膜在模拟废水中展现出优异的Co²⁺吸附性能，能够在高通量[850L/（m²·h），ΔP=0.02MPa]、较宽的pH范围内（pH≥6）有效去除废水中的微量Co²⁺，并且改性膜具有良好的抗离子干扰性能以及可再生性能，10次循环使用后膜的再生效率超过95%，在含金属废水处理领域具有很好的应用前景。

关键词: 亲和膜, 聚乙烯亚胺, 吸附, 钴, 废水, 再生

Abstract: Membrane adsorption as a novel technology of removing heavy metal ions has been widely reported. However,the reported affinity membranes were mostly removing heavy metal ions by static adsorption. There are two deficiencies of static adsorption. The adsorption period is very long and the functional materials on the membranes are easily dissolved and detached in aqueous solution. Herein,a typical PEI-grafted porous membranes were prepared by poly-(3,4-dihydroxyphenylalanine)(PDOPA) deposition followed by polyethyleneimine(PEI)grafting and then cross-linking on polycaprolactam(PA-6) substrates. The PEI-grafted porous membranes with high specific surface area,high permeability and high chemical stability behaved excellently with trace Co²⁺ dynamic adsorption from wastewater. In details,the modified membranes successfully removed Co²⁺ under high water flux[850L/(m²·h),ΔP=0.02MPa],and wide pH range(pH ≥ 6). Besides,the modified membranes possess remarkable anti-ion interference and renewability with the renewable degree about 95% even after ten cycles. Thus,the PEI-grafted membranes are very promising for dynamically removing trace HMIs from wastewater.

Key words: affinity membrane, polyethyleneimine, adsorption, cobalt, wastewater, regeneration

中图分类号:

TQ028.8

阮雪华, 徐燕, 周子渊, 廖绪行, 金丽丽, 鞠佳, 贺高红. 聚乙烯亚胺(PEI)改性多孔膜动态吸附废水中的Co²⁺[J]. 化工进展, 2017, 36(12): 4658-4663.

RUAN Xuehua, XU Yan, ZHOU Ziyuan, LIAO Xuhang, JIN Lili, JU Jia, HE Gaohong. Dynamic adsorption of Co²⁺ from wastewater by polyethyleneimine(PEI)-grafted porous membranes[J]. Chemical Industry and Engineering Progress, 2017, 36(12): 4658-4663.

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聚乙烯亚胺(PEI)改性多孔膜动态吸附废水中的Co²⁺

Dynamic adsorption of Co²⁺ from wastewater by polyethyleneimine(PEI)-grafted porous membranes

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