城市垃圾焚烧烟气中重金属的源项解析和干沉降影响研究

摘要

Heavy metal deposition from flue gas is one of the significant environmental problems that are generated by incinera- tion of rubbish in power generation. Various sources can bring about heavy metals in municipal solid waste. The pollutants from flue gas include elemental heavy metals, oxidation and chlorination of heavy metals and so on. There are two mechanisms to eliminate heavy metal deposition, named particulate dry deposition and gaseous dry deposition, respectively. Taking municipal solid waste dis- posal center as example, the essay will evaluate the effects of Pb, Cd and Hg dry deposition on soils with AERMOD model.%烟气中重金属沉降污染是城市垃圾焚烧发电项目应关注的重要环境问题,城市垃圾中重金属来源广泛,焚烧烟气中产物包括元素态重金属、重金属氧化物及重金属氯化物等。重金属干沉降有两种清除机制,包括颗粒物干沉降和气体干沉降。以北京某生活垃圾处理中心为例,用AERMOD模式预测焚烧烟气中铅、汞和镉的干沉降对土壤的影响。