重庆市颗粒物PM_(10)/PM_(2.5)中元素污染特征和来源  

Element Distribution Characteristics and Source Apportionment in PM_(10),PM_(2.5) in Chongqing

作　　者：焦姣[1] 姬亚芹[1] 白志鹏[2] 任丽红[2] 周志恩[3] 赵雪艳[2] 

机构地区：[1]南开大学环境科学与工程学院,天津300071 [2]中国环境科学研究院,北京100012 [3]重庆市环境科学研究院,重庆401147

出　　处：《南开大学学报（自然科学版）》2013年第6期8-13,19,共7页Acta Scientiarum Naturalium Universitatis Nankaiensis

摘　　要：2012年在重庆市6个采样点采集PM10和PM2.5样品,采用电感耦合等离子体质谱仪(ICP-MS)和电感耦合等离子光谱仪(ICP-OES)测定了样品中Na、Mg、Al、K、Ca、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Cd、Pb等17种元素含量,并采用地质累积指数法定性分析其污染特征和主要来源.结果表明,除Al、Ca和Co外,其他元素更容易富集于PM2.5上.Zn、As、Pb、Cd在PM10和PM2.5中累积程度较高,表明重庆市燃煤、城市交通、工业等污染严重.大渡口和沙坪坝站点PM10和PM2.5中各元素的累积程度相对偏高,南坪、缙云山、巴南3个采样点各元素的累积程度相对偏低.PM10 and PM2.5 samples were collected at six sites throughout the year of 2012 in Chongqing.The concentrations of 17 elements（Na,Mg,Al,K,Ca,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn,As,Cd and Pb）in the samples were determined by ICP-MS and ICP-OES technique.Then the method of geoaccumulation index was applied to analyze the pollution characteristics and pollution source.The results showed that,except for Al,Ca and Co,other elements were easier enriched in PM2.5.Zn,As,Pb and Cd were presented at an extremely high level of accumulation degree,which revealed that the pollution coming from fuel coal,urban traffic and industry was serious.By comparison,the pollution levels of elements in the sampling sites of Dadukou and Shapingba were relatively high.While the pollution levels in the sampling sites of Nanping,Jinyunshan and Banan were relative lower.

关 键 词：颗粒物 分歧系数 地质累积指数 重庆市 

分 类 号：X51[环境科学与工程—环境工程]