北京师范大学学报（自然科学版）
北京師範大學學報（自然科學版）
북경사범대학학보（자연과학판）
JOURNAL OF BEIJING NORMAL UNIVERSITY
2015年
4期
362-367
,共6页
徐亚%仇猛淋%郑晨龙%田平%王广甫%张仁健
徐亞%仇猛淋%鄭晨龍%田平%王廣甫%張仁健
서아%구맹림%정신룡%전평%왕엄보%장인건
北京%夏季气溶胶%PM2. 5%PM10%可溶性离子
北京%夏季氣溶膠%PM2. 5%PM10%可溶性離子
북경%하계기용효%PM2. 5%PM10%가용성리자
Beijing%summer aerosol%PM2.5%PM1 0%water-soluble ions
对北京市城区2012年夏季大气对气溶胶进行每日 PM2.5和 PM10石英膜采样,得到了可溶性离子质量浓度和16种元素的质量浓度,并结合气象观测值进行了分析.结果显示,采样期间,PM2.5质量浓度为9.58~210.42μg·m-3,平均值102.81μg·m-3；PM10质量浓度为33.75~288.33μg·m-3,平均值1 59.66μg·m-3.PM2.5和 PM10质量浓度都与采样点能见度、风速呈负相关,与相对湿度呈正相关.质子荧光分析(PIXE)结果显示,S、K、Ca 和 Fe 在 PIXE 可分析元素中含量较高,在 PM2.5和 PM10都占89%.且元素 Ca、Ti、Sc、Cr、Fe 主要存在于粗粒子(PM2.5~10)中,而元素 S、Cu、Zn、As、Br、Pb 主要存在于细粒子(PM2.5)中.富集因子分析表明,元素 K、Ca、Ti、V、Mn、Ni 主要为地壳来源,元素 S、Cl、Cu、Zn、As、Br、Pb 主要来自于人为源.SO2-4、NO-3、NH +43种可溶性离子总质量浓度占 PM2.5浓度的43.5%,占 PM10浓度的25.4%.
對北京市城區2012年夏季大氣對氣溶膠進行每日 PM2.5和 PM10石英膜採樣,得到瞭可溶性離子質量濃度和16種元素的質量濃度,併結閤氣象觀測值進行瞭分析.結果顯示,採樣期間,PM2.5質量濃度為9.58~210.42μg·m-3,平均值102.81μg·m-3；PM10質量濃度為33.75~288.33μg·m-3,平均值1 59.66μg·m-3.PM2.5和 PM10質量濃度都與採樣點能見度、風速呈負相關,與相對濕度呈正相關.質子熒光分析(PIXE)結果顯示,S、K、Ca 和 Fe 在 PIXE 可分析元素中含量較高,在 PM2.5和 PM10都佔89%.且元素 Ca、Ti、Sc、Cr、Fe 主要存在于粗粒子(PM2.5~10)中,而元素 S、Cu、Zn、As、Br、Pb 主要存在于細粒子(PM2.5)中.富集因子分析錶明,元素 K、Ca、Ti、V、Mn、Ni 主要為地殼來源,元素 S、Cl、Cu、Zn、As、Br、Pb 主要來自于人為源.SO2-4、NO-3、NH +43種可溶性離子總質量濃度佔 PM2.5濃度的43.5%,佔 PM10濃度的25.4%.
대북경시성구2012년하계대기대기용효진행매일 PM2.5화 PM10석영막채양,득도료가용성리자질량농도화16충원소적질량농도,병결합기상관측치진행료분석.결과현시,채양기간,PM2.5질량농도위9.58~210.42μg·m-3,평균치102.81μg·m-3；PM10질량농도위33.75~288.33μg·m-3,평균치1 59.66μg·m-3.PM2.5화 PM10질량농도도여채양점능견도、풍속정부상관,여상대습도정정상관.질자형광분석(PIXE)결과현시,S、K、Ca 화 Fe 재 PIXE 가분석원소중함량교고,재 PM2.5화 PM10도점89%.차원소 Ca、Ti、Sc、Cr、Fe 주요존재우조입자(PM2.5~10)중,이원소 S、Cu、Zn、As、Br、Pb 주요존재우세입자(PM2.5)중.부집인자분석표명,원소 K、Ca、Ti、V、Mn、Ni 주요위지각래원,원소 S、Cl、Cu、Zn、As、Br、Pb 주요래자우인위원.SO2-4、NO-3、NH +43충가용성리자총질량농도점 PM2.5농도적43.5%,점 PM10농도적25.4%.
Daily atmospheric aerosol PM2.5 and PM1 0 were sampled on quartz films in urban Beijing in the summer of 2012.Mass concentration,water-soluble ionic composition,concentration and enrichment factors of 1 6 elements were investigated.The correlation between meteorological conditions and aerosol concentrations were investigated.The weighted mass concentration of PM2.5 was found to be from 9.58 ~ 210.42 μg·m-3 , with an average value of 102.81 μg·m-3 .The weighted PM1 0 mass concentration was found to be from 33.75~288.33 μg·m-3 ,with an average value of 159.66 μg·m-3 .Both PM2.5 and PM1 0 concentrations showed inverse correlation with visibility and wind speed,but positive correlation with relative humidity.PIXE analysis showed that the total mass of elements S,K,Ca and Fe accounted for 89% in PM2.5 and PM1 0 .Elements Ca, Ti,Sc,Cr and Fe mainly remained in coarse particles,but elements S,Cu,Zn,As,B and Pb were mainly present in fine particles.Enrichment factor analysis indicated that elements K,Ca,Ti,V,Mn and Ni were largely from crustal sources,whilst elements S,Cl,Cu,Zn,As,Br and Pb were largely from anthropogenic sources.Ions SO2 -4 ,NO-3 and NH +4 dominated the dissolved ionic components,occupying 43.5% and 25.4%respectively of total mass concentrations of PM2.5 and PM1 0 .
