室内外PM2.5中金属元素的污染特征及来源  

Pollution characteristics and sources of metal elements in indoor and outdoor PM_(2.5)

作　　者：许悦 王可 刘雪梅 李慧明[1] 钱新[1] XU Yue;WANG Ke;LIU Xue-mei;LI Hui-ming;QIAN Xin(State Key Laboratory of Pollution Control and Resources Reuse,School of the Environment,Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210023

出　　处：《中国环境科学》2018年第4期1257-1264,共8页China Environmental Science

基　　金：国家自然科学基金青年项目(41501549)

摘　　要：在南京市仙林地区住宅楼内和室外采集PM_(2.5)样品,分析PM_(2.5)中金属的污染特征及主要来源.结果显示,室内外PM_(2.5)平均浓度分别为80.56μg/m3和96.77μg/m3,室内外PM_(2.5)浓度比(I/O)平均值为0.87.除Mg外,室外其他金属平均值均高于室内.元素Pb室内外浓度相关性最高,R值为0.807.室内外PM_(2.5)中金属元素Cd、Cu、Pb、Zn、As、Co、Cr和Ni富集程度较高.主成分分析结果显示,室外PM_(2.5)中金属的主要来源为土壤尘、交通排放、金属冶炼、垃圾焚烧等;室内PM_(2.5)中金属可能的来源为室外颗粒物的渗透及室内烹饪和家具材料等.The pollution characteristics and main sources of metal elements were analysed in PM2.5 samples collected inside and outside residential buildings in Xianlin districts of Nanjing,China.The results showed that indoor and outdoor PM2.5 concentrations were 80.56 and 96.77μg/m3,The average indoor and outoloor PM2.5 concentration ratio(I/O)is 0.87.respectively.Except for Mg,the average values of other metals in outdoor PM2.5 were higher than indoor values.The correlation between indoor and outdoor concentrations of element Pb was the highest,and the R value was 0.807.Cd,Cu,Pb,Zn,As,Co,Cr and Ni were found to be relatively highly enriched both in indoor and outdoor PM2.5 samples.Results of principal component analysis showed that the main pollution sources of metals in outdoor PM2.5 were soil derived dust,traffic emissions,metal smelting and rubbish incineration,etc.The probable pollution sources of metals in indoor PM2.5 included air infiltration of outdoor particulate matter,indoor cooking and furniture materials,etc.

关 键 词：PM2.5 金属元素 室内外 来源 

分 类 号：X513[环境科学与工程—环境工程]