| 北京市大气颗粒物中Cd的地球化学分布特征及其生态风险评估 |
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| 引用本文： | 魏敏,冯海艳,杨忠芳.北京市大气颗粒物中Cd的地球化学分布特征及其生态风险评估[J].现代地质,2012,26(5):983-988. |
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| 作者姓名： | 魏敏 冯海艳 杨忠芳 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院,北京100083;胜利油田西部新区研究中心,山东东营257000
2. 中国地质大学地球科学与资源学院,北京,100083 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目，中国地质调查局“北京市平原区农田生态系统区域生态地球化学评价”项目 |
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| 摘 要： | 采集北京市11个区县内的大气颗粒物样品,分析了TSP、PM10、PM2.5的含量分布特征,重金属元素Cd在大气颗粒物中的地球化学分布特征及其生态风险,结果表明:北京市3种粒径的大气颗粒物中PM2.5的超标幅度最大,并且PM10中载带的重金属大部分都集中在PM2.5中。除密云、通州地区外,Cd元素在不同粒级大气颗粒物中浓度的高低表现为TSP>PM10>PM2.5;不同功能区相比,公园中大气颗粒物中Cd元素浓度明显高于农田区和教育区,因此公园的环境质量问题应该引起相关部门的关注。研究区内不同粒径大气颗粒物中Cd元素的非致癌风险较小,但与其他地区相比,海淀区的非致癌风险较高,大气颗粒物超标幅度最大,因此应该重视海淀区的环境健康问题。
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| 关 键 词： | 大气颗粒物 Cd 地球化学特征 生态风险评估 北京市 |
The Distribution Characteristics and Ecological Risk Assessment of Cd in Atmospheric Particulate Matter of Beijing |
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| WEI Min
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FENG Hai-yan
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YANG Zhong-fang.The Distribution Characteristics and Ecological Risk Assessment of Cd in Atmospheric Particulate Matter of Beijing[J].Geoscience——Journal of Graduate School,China University of Geosciences,2012,26(5):983-988. |
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| Authors: | WEI Min FENG Hai-yan YANG Zhong-fang |
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| Institution: | 1(1.School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China; 2.Shengli Oilfield Western New Prospect Research Center,Dongying,Shandong 257000,China) |
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| Abstract: | The samples of atmospheric particulate matter were collected from 11 districts/counties of Beijing,the content distribution characteristics in TSP,PM10 and PM2.5,and geochemical characteristics of Cd in them(TSP,PM10,PM2.5) were analyzed,the ecological risk of Cd in atmospheric particulates was assessed.The results indicated that the mass concentration of PM2.5 exceeded the standard highest among three particle sizes of atmospheric particulates in Beijing.With heavy metals in PM10,most of them are concentrated in PM2.5.Except Miyun and Tongzhou,the concentration level of Cd in three particle sizes of atmospheric particulates is TSP>PM10>PM2.5.Comparing with different functional areas,the mass concentration of Cd in the park is higher than that in the education area and farmland area,so the environmental quality problems in the park should arouse the relevant departments' concern.Although the non-cancer risk of Cd of atmospheric particulates is low,the non-cancer risk in Haidian district is the highest in Beijing.Therefore,more attention should be paid to the environmental health issues in Haidian district. |
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| Keywords: | atmospheric particulate matter Cd geochemical characteristics ecological risk assessment Beijing |
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