涉重危废资源化利用理论体系

Hazardous wastes containing heavy metals have both serious environmental threats and high recycling value, which result in global contamination of heavy metals and fierce metals resource loss if discarded without proper treatment. The recovery of valuable metals from hazardous wastes containing heavy metals not only eliminates the pollution of heavy metals at the sources but also recycles the non-renewable metals resources, representing a hot issue in both environmental sciences and metals smelting. However, the works concerning hazardous wastes containing heavy metals are discrete, scattered, individual studies and do not form complete and systematic theory to guide the scientific, efficient and sustainable resource utilization of heavy metals-containing hazardous wastes. In the current work, four important fundamental concepts covering hazardous wastes containing heavy metals, five classification methods of metals, three-dimension properties and precise grading and classification were established, and four important branch systems including precise grading and classification system, harmless disposal and resource utilization boundary identification system, metals extraction/separation technology system and detoxification residue-used building materials quality control standard system were reviewed. Based on the four important fundamental concepts and the four important branch systems, the theoretical system of resource utilization of hazardous wastes containing heavy metals was put forward for the first time.