含铬废弃物的污染问题已成为制约传统皮革行业可持续发展的主要因素。当前含铬皮革废碎料的研究主要聚焦于如何提取和利用胶原蛋白，而皮革废碎料中的铬并未得到有效利用。本项目首次提出了皮革废碎料中胶原蛋白和铬“双资源化利用”的理念，结合前沿交叉学科的研究热点，解决如何实现含铬皮革废碎料在提取胶原蛋白过程中产生的含铬污泥或废液中铬的“高值化”转化的问题。申请者在化学选择性的调控和应用、新型配合物催化材料的设计、以及含铬废皮渣中胶原蛋白的资源化利用方面都有相关研究基础。因此，本项目拟基于化学选择性原理，将皮革废碎料在提取胶原蛋白过程中产生的“皮革提胶污泥/废液”中的铬转化为具有催化功能的铬基MOF或其它新型含铬材料，阐明其中的化学选择性规律和化学机制，最终建立“皮革提胶污泥/废液”中铬的“高值化”转化技术与理论体系。本项目的实施将为皮革固体废弃物和其它含铬废弃物的综合资源化利用提供理论支持和技术借鉴。

The pollution of chromium-containing wastes has become an all-important factor restricting the sustainable development of traditional leather industry. In view of the current problem that the resource utilization of chromium-containing tanned leather wastes is mainly concentrated on collagen rather than its chromium, this project has put forward the concept of "double resource utilization" of collagen and chromium in chromium-containing tanned leather wastes for the first time, and the novel "high value" conversion strategy of chromium in sludge and effluent produced in leather collagen extraction. The project applicant has been engaged in the research on the regulation and application of chemical selectivity, the design of new complex catalytic materials and the resource utilization of collagen in leather waste. We also have developed recently a method for preparing collagen aggregation and collagen from chromium-containing tanned leather waste by acid-enzyme controlled degradation technology. As inspired by the theories and technologies of frontier interdisciplinary and the focus of chemistry, material science, clean leather production technology and their cross-discipline, this project study intends to apply the chemical selectivity, by which could transform chromium from the chromium-containing wastes generated in the collagen extraction process of tanned leather wastes into advanced catalytic materials such as chromium-containing MOFs, nano-composite materials of chromium and chromium-doped carbon materials and other material. Meanwhile, this project will elucidate the chemical selectivity and its mechanism in the above process and establish the technical and theoretical system of "high-value" transformation of chromium in the sludge and effluent produced in leather collagen extraction. The implementation of this project will enrich the theory of comprehensive resource utilization of chromium-containing tanned leather wastes and other wastes containing chromium, which has scientific significance and potential application value.