微流控技术构建双网络微凝胶及其重金属吸附机制和处理工艺研究

针对严重影响人类健康与生存的重金属污染这一重大环境问题，本项目以黄芪废渣再利用及双网络凝胶为研究基础，提出采用微流控技术构建马来酸、纤维素的双网络微凝胶体系处理含重金属工业废水的新思路。项目利用现代分析测试手段拟对复合凝胶的结构与重金属吸附性能的构效关系展开深入的研究，着重考察微流控技术中渗流特性对微凝胶的形成和大小影响，探讨修饰后微凝胶的结构、力学性能等物化性质与重金属离子去除效率之间的关系，重点剖析吸附的界面过程，尝试阐释重金属离子在微凝胶内部的扩散行为和吸附机制，旨在反馈凝胶的制备，提高其对重金属的吸附能力。探索微凝胶对重金属废水的原位动态吸附-脱附工艺，优化中试试验工艺，实现微凝胶的高效吸附与有效再生、废水中重金属离子的高效去除与资源化回收的目标，为微流控技术制备双网络凝胶在重金属污染的环境深度净化处理提供一定的理论依据和技术支持。

Heavy metal pollution has become a serious environmental issue and is a serious threat to human health and survival. In this project, we propose a novel idea to treat wastewater with heavy metal ions by employing double network (DN) hydrogel, which is prepared by microfluidic technology using maleic acid and waste residue of astragalus. This project focuses on researching the quantitative structure-activity relationship between the structure of this composite gels and the adsorption performance for heavy metal ions by modern analytical techniques and mechanical performance tests. The influence of seepage characteristic on the formation and size of DN gel will be systematically investigated, the effect of the physico-chemical property such as the structure, mechanical strength of the DN gel on the high heavy metal removal rate also will be deeply studied. Besides, the interface process of adsorption such as diffusion behavior and adsorption mechanism of heavy metal ions in DN gel will be systematically investigated, and the aim is to realize the preparation of better gel to improve its adsorption capacity of heavy metal ions. The regeneration of sorbents and recycling capacity of heavy metal ions will be evaluated through the large-scale adsorption and separation technology, and to achieve the goal of the effective adsorption and regeneration of DN gel and efficient removal and recycle of heavy metal ions from wastewater. This project provides an important scientific basis for the preparation of DN gel by microfluidic technology in the deep purification treatment of heavy metal pollution.