中文摘要：

应用承重撞击器（DGI）采样系统在南昌某电厂2#锅炉电除尘器前进行颗粒物采集,并同时采集了原煤样和底灰样。对飞灰的质量粒径分布、底灰和飞灰中次量与痕量元素的分布特性进行了分析。结果表明PM1.0和PM2.5质量分别占PM10质量的16.0%～17.4%和46.9%～50.6%;Na、Mg、P、S主要富集在亚微米颗粒物中,Al、Si、Ca、Ti、Fe、K主要富集在超微米颗粒物中;随着颗粒物粒径的减小,As、Cd、Cr、Pb的浓度逐渐增大,且在亚微米颗粒物中的增幅大于超微米颗粒物,Mn在各级颗粒物中浓度相近;As、Cd、Cr、Pb大量富集于亚微米颗粒物之上,Mn在各级颗粒物中富集特性无明显差异,且各痕量元素挥发特性存在以下规律：As〉Cd〉Cr〉Pb〉Mn;文中给出了无控制条件下痕量元素的排放因子,PM1.0中各元素排放比例存在以下规律：As〉Cd〉Cr〉Pb〉Mn。

英文摘要：

Sampling system with Dekati Gravimetric Impacter（DGI）was positioned in front of the 2# boiler ESP of a power plant in Nanchang and used to collect PMs,while the samples of raw coal and bottom ash were also taken.The massive particle size distribution of fly ash,the distribution characteristics of minor and trace elements in bottom ash and fly ash were measured and analyzed.The results indicate that the mass of PM1.0 and PM2.5 are 16.0%—17.4% and 46.9%—50.6% respectively.Na,Mg,P and S mainly enrich in submicron particles,and Al,Si,K,Ca,Ti and Fe mainly do in supermicron particles.With the decrease of particle size,the concentration of As,Cd,Cr and Pb increases,and the growth rate is higher for submicron particles than for supermicron particles,the concentration of Mn in different PM is similar.A large amount of As,Cd,Cr and Pb involves in the submicron PM,but Mn has no significant difference for different size PM particles.The volatileness of trace elements is AsCdCrPbMn,and their emission factors under non-controlled conditions are listed in the paper.For PM1.0,the order of emission ratio of trace elements is the same as volatility,i.e.,AsCdCrPbMn.