基于NMF非负矩阵模型的土壤中重金属和多环芳烃污染源解析

Non-negative Matrix Factorization(NMF)for Source Analysis of Heavy Metals and Polycyclic Aromatic Hydrocarbon(PAHs)in Soil of Industrial Site

采用NMF非负矩阵模型对某工业污染场地表层土壤中的重金属和多环芳烃污染源进行解析,发现该场地土壤中重金属污染来源主要为燃料燃烧源、冶炼源和电镀源,多环芳烃类物质来源主要是燃料燃烧,其次为冶炼源;燃料燃烧源、冶炼源和电镀源是本研究场地表层土中重金属和多环芳烃的主要来源,其贡献率分别为50.87%、35.42%和9.53%;NMF非负矩阵模型对于污染场地污染来源解析具有一定的辅助作用。

The non-negative matrix factorization(NMF)was applied to obtain the pollution source of heavy metals and Polycyclic aromatic hydrocarbon(PAHs)in the soil of industrial site.The results suggested that heavy metals in this industrial site came mainly from Fuel combustion,smelting and electroplating,PAHs came mainly from Fuel combustion,and smelting secondly.The main pollution source of this site was Fuel combustion,smelting and electroplating,whose contribution rate was 50.87%,35.42%and 9.53%.And NMF can play better auxiliary function on the analysis of pollution sources of contaminated site.