离子型稀土生态生命周期评价(Eco-LCA)

Ecologically Based Life Cycle Assessment of Ion-absorbed Rare Earth

为缓和稀土生产与生态环境之间日益严峻的关系,找到减少稀土生产造成污染的方法。基于生命周期评价,引入生态累积(火用)耗(ECEC)的理念,结合能值理论,构建了生态生命周期评价(Eco-LCA)系统。Eco-LCA以太阳(火用)当量作为系统的统一衡量标准,量化了离子型稀土生产过程中各影响因素,根据量化后得到的生态累积(火用)耗对离子型稀土生产的可持续性影响和其他环境负荷进行评价。结果表明,生态生命周期系统能清晰的阐述稀土生产过程中各影响因素与环境之间的相互作用以及作用程度;同时,生态生命周期评价还能通过建模计算的方式,筛选出资源利用率高、对环境影响小的工艺条件,为生产工艺的优化提供理论指导。

In order to alleviate the increasingly serious problems between rare earth production and ecological environment and finding out the method to reduce the pollution from producing of rare earth,ecologically based life cycle assessment(Eco-LCA)is built by introducing the concept of ecological accumulation and consumption and combining with energy theory.Taking the solar equivalent as the unified standard of the system,the influencing factors in the production process of ion rare earth are quantified,and the sustainability of ion rare earth production and other environmental loads are evaluated according to the ecological cumulative consumption obtained after quantification.The results show that the ecological life cycle system can clearly explain the interaction and degree between the influencing factors and the environment in the process of rare earth production.At the same time,the ecological life cycle assessment can also select the better processes with higher resource utilization rate and less environmental impact through modeling and calculation,and provide theoretical guidance for the optimization of the process according to the analysis of the consequences.