摘要
针对采用化学质量平衡模型(CMB)进行大气颗粒物源解析时,混合尘源由于与单一尘源存在严重共线性而不能代入模型的问题,首先对混合尘进行源解析,根据解析结果将混合尘分拆为对应的单一尘源,然后与原有的单一尘源共同代入CMB进行源解析,提出了大气颗粒物混合尘溯源解析新方法.将混合尘溯源解析新方法应用于某市的大气颗粒物尘源解析,得到扬尘的贡献率为28.75%,较二重源解析技术的46.3%和二重源解析技术改进方法的38.38%都要低,表明新方法更好地解决了共线源代入CMB出现的问题.受体元素计算值与测量值的比值较二重源解析技术改进方法有更多元素接近1,表明新方法建立的模型更加合理.
It is difficult for chemical mass balance model to obtain the apportion coefficient of mixed atmospheric particulate source directly when mixed source and single sources are seriously collinear,so a new method,exploring origin of mixed source(EOMS),was proposed.The new model(EOMS),improved-souce-appointment technique(ISA) and method amending of ISA(MAISA) were used in source apportionment of atmospheric for a city respectively.The computational results showed that the contribution rate of dust was 28.75% according to EOMS model's calculation,which was lower than 46.3% and 38.38% according to ISA model's and MAISA model's calculation respectively,at the same time,the ratio of calculated data and measured data of receptor elements based on EOMS model was closer to 1 than that base on MAISA model.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第6期881-885,共5页
China Environmental Science
基金
四川省教育厅项目(07ZB014)
中国气象局城市气象科学研究基金(UMRF200903)
成都信息工程学院引进人才科研启动项目基金(KYTZ200806
KYTZ200919)
关键词
源解析
混合源
化学质量平衡模型
source apportionment
mixed source
chemical mass balance model
作者简介
责任作者,副教授,zoucw@cuit.edu.cn邹长武(1974-),四川宜宾人,副教授,博士,主要从事环境信息分析研究.发表论文20余篇.