Geochemical study of submicron particulate matter(PM1)in a metropolitan area  

作　　者：Ismael L.Schneider Elba C.Teixeira Guilherme L.Dotto Diana Pinto Cheng-Xue Yang Luis F.O.Silva 

机构地区：[1]Postgraduate Program in Remote Sensing and Meteorology,Universidade Federal do Rio Grande do Sul,Av.Bento Gonçalves,9500 Porto Alegre,RS,Brazil [2]Department of Civil and Environmental,Universidad de la Costa,CUC,Calle 58#55-66,Barranquilla,Atlantico,Colombia [3]Research Department,Fundação Estadual de Proteção Ambiental Henrique Luís Roessler,Av.Borges de Medeiros,261,Porto Alegre,RS,Brazil [4]Chemical Engineering Department,Federal University of Santa Maria,97105-900 Santa Maria,Brazil [5]School of Earth Sciences and Resources,China University of Geosciences Beijing,Beijing 100083,PR China [6]Departamento de Ingeniería Civil y Arquitectura,Universidad de Lima,Avenida Javier Prado Este 4600–Santiago de Surco 1503,Perú

出　　处：《Geoscience Frontiers》2022年第1期417-429,共13页地学前缘（英文版）

摘　　要：Air pollution has become a major problem in urban areas due to increasing industrialization and urbanization.In this study ambient concentrations of PM1 and metal concentrations as well as source contributions were identified and quantified by using Positive Matrix Factorization(PMF)in receptor modeling in the Metropolitan Area of Porto Alegre,Brazil.The PM1 samples were collected on PTFE filters from December 2012 to December 2014 in two sampling sites.Major ion and trace element concentrations were assessed.The average concentrations were 12.8 and 15.2μg/m^(3) for Canoas and Sapucaia do Sul sites,respectively.Major ion contributions of PM1 were secondary pollutants such as sulfate and nitrate.Trace elements,especially Cu,Pb,Zn,Cd,and Ni also made important contributions which are directly associated with anthropogenic contributions.Our results show significantly higher levels in winter than in summer.Most of the PM1 and the analyzed PM species and elements originated from anthropogenic sources,especially road traffic,combustion processes and industrial activities,which are grouped in 7 major contributing sources.A back-trajectory analysis showed that the long-range transport of pollutants was not relevant in relation to the contribution to PM1 and metal concentrations.This work highlights the importance of urban planning to reduce human health exposure to traffic and industrial emissions,combined with awareness-raising actions for citizens concerning the impact of indoor sources.

关 键 词：PM1 Trace elements Source apportionment PMF Back trajectory 

分 类 号：X513[环境科学与工程—环境工程]