Chemical signature and fractionation of trace elements in fine particles from anthropogenic and natural sources  

作　　者：Rujin Huang Wei Yuan Ting Wang Wenjuan Cao Ying Wang Chunshui Lin Lu Yang Jie Guo Haiyan Ni Feng Wu 

机构地区：[1]State Key Laboratory of Loess and Quaternary Geology(SKLLQG),Center for Excellence in Quaternary Science and Global Change,and Key Laboratory of Aerosol Chemistry and Physics,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China

出　　处：《Journal of Environmental Sciences》2022年第4期365-375,共11页环境科学学报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2017YFC0212701);the National Natural Science Foundation of China(NSFC)(Nos.41877408,41925015 and 91644219);the Chinese Academy of Sciences(No.ZDBS-LY-DQC001);the Cross Innovative Team fund from the State Key Laboratory of Loess and Quaternary Geology(SKLLQG,No.SKLLQGTD1801)

摘　　要：The health effects of trace metal elements in atmospheric fine particulate matter(PM_(2.5))are widely recognized,however,the emission factor profiles and chemical fractionation of metal elements in different sources were poorly understand.In this study,sixteen metal elements,including Cd,Pb,V,Zn,Ba,Sb,As,Fe,Sr,Cr,Rb,Co,Mn,Cu,Ni and Sn frombiomass burning,bituminite and anthracite combustion,as well as dust,were quantified.The results showdifferent emission sourceswere associated with distinct emission profiles,holding important implications for source apportionment of ambient particulate metals.Specifically,Fe was the dominant metal species(28-1922 mg/kg)for all samples,and was followed by different metals for different samples.For dust,Mn(39.9 mg/kg_(dust))had the second-highest emission factor,while for biomass burning,itwas Cr and Ba(7.5 and 7.4mg/kg_(biomass),respectively).For bituminous coal combustion,the emission factor of Zn and Ba was 6.2 and 6.0 mg/kg_(bituminous),respectively,while for anthracite combustion the corresponding emission factor was 5.6 and 4.3 mg/kg_(anthracite),respectively.Moreover,chemical fractionation(i.e.,the exchangeable,reducible fraction,oxidizable,and residual fraction)and the bioavailability index(BI)values of the metal elements from different sources were further investigated to reveal the link between different emission sources and the potential health risk.The findings from this study hold important implications for source apportionment and sourcespecific particulate metal-associated health effects.

关 键 词：Metal elements SOURCES Emission profiles Chemical fractionation 

分 类 号：X513[环境科学与工程—环境工程]