本项目拟研究制备一种新型的纤维素基纳米工程材料，用于除去废水中的重金属离子。将采用原位合成的方法，实现纳米颗粒在纤维素纤维上的固定。通过调控纳米颗粒在纤维表面的形成（晶型、大小和分布），得到不同组成配比且可工程应用的纳微结构。研究这种复合材料对水中重金属离子的吸附和解附性能及机理，找出纳微结构和化学组成对吸附分离的规律，进而对材料的合成进行优化，为规模生产和实际应用奠定基础。本项目将功能纳米颗粒原位固定于可再生的天然材料上，不仅可以解决纳米吸附材料在水处理应用中的团聚、流失和二次污染等问题，而且通过利用两种材料协同吸附重金属的能力，克服它们各自单独使用的缺点，可实现技术的绿色化和效率化的统一而更容易在工程应用上被接受，体现技术本身的可持续性意义。

This work plans to fabricate a new type of cellulose-based material with nanoengineered structures to remove heavy metals from wastewater. In-situ synthesis method will be used to generate and immobilize nano-particles (NPs) immediately on cellulose fibers. Various nano-/micro-structures with different amount of chemical composition will be obtained by controlling formation (crystalline, size and distribution) of the NPs on the surface of cellulose fibers. The performance and mechanism of adsorption and desorption of heavy metals onto and from the materials in wastewater will then be studied, and the correlation between structure, composition and separation efficiency will be identified. This will allow us to optimize the synthesis conditions and provide the foundation for large-scale production and application of the material. The uniqueness of this work is to grow in-situ functional NPs tightly on renewable natural materials, which will largely resolve some practical issues of nanosorbent application in water treatment, such as particle agglomeration, particle loss in environment and its induced secondary pollution. In addition, the work will take advantage of both materials' property for synergistic adsorption of heavy metals to overcome the shortcomings of the use of each individual material as a sorbent. As a result, the greening and the efficiency of the technology will be realized at the same time for it to be more acceptable in engineering applications, demonstrating the sustainable nature of the technology itself.