| 田蓉,刘迎云,熊佩,陈攀.衡阳市中心城区冬季雾霾天PM2.5中重金属污染初探[J].南华大学学报(自然科学版),2016,30(3):110~114, 118.[TIAN Rong,LIU Ying-yun,XIONG Pei,CHEN Pan.Primary Study on Pollution of Heavy Metals in PM2.5 underHaze-fog Weather in Hengyang City During Winter[J].Journal of University of South China(Science and Technology),2016,30(3):110~114, 118.] |
| 衡阳市中心城区冬季雾霾天PM2.5中重金属污染初探 |
| Primary Study on Pollution of Heavy Metals in PM2.5 underHaze-fog Weather in Hengyang City During Winter |
| 投稿时间：2016-03-24 |
| DOI： |
| 中文关键词: 大气PM2.5 重金属 污染水平 富集因子 |
| 英文关键词:atmospheric PM2.5 heavy metals pollution level enrichment factor |
| 基金项目:南华大学研究生科研创新基金资助项目(2015XCX29) |
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| 中文摘要: |
| 为了解衡阳市中心城区雾霾天PM2.5中重金属污染特征与来源,2014~2015年连续2年对衡阳市城区冬季大气PM2.5进行采集.通过滤膜称重法测量PM2.5质量浓度,微波消解—原子吸收光谱法(AAS)测定PM2.5中Pb、Cd、Cu、Cr、Ni和Fe等6种重金属元素质量浓度,结合富集因子法对衡阳城区大气PM2.5进行来源解析.结果表明:采样期间,衡阳市中心城区冬季雾霾天PM2.5平均质量浓度均超过国家二级标准,2014和2015年冬季PM2.5中重金属污染趋势基本相同,分别为Cu>Fe>Pb>Cr>Ni>Cd和Cu>Fe>Cr>Pb>Ni>Cd,表明衡阳城区冬季重金属污染规律明显,富集因子法分析后发现PM2.5中Pb、Cd、Cu、Cr、Ni和Fe元素的EF值均大于10,明显来自于人为污染源,其中Cd、Cu为极强富集,污染可能来源于城区周围金属冶炼和工业燃煤烟尘. |
| 英文摘要: |
| To study pollution characteristics and sources of heavy metals in PM2.5 under haze-fog weather in Hengyang city,atmospheric particulate matters in Hengyang city were investigated during 2014~2015 winter.The concentration of PM2.5 were measured by filter membrane weighting method and microwave digestion and atomic absorption spectroscopy(AAS)method were used for analyzing 6 heavy metals (Pb,Cd,Cu,Cr,Ni and Fe) in PM2.5,pollution characteristics of heavy metals in PM2.5 were analyzed by enrichment factor method.The results indicated that the concentrations of atmospheric PM2.5 under haze-fog weather were much higher than the 24 h mean value(75 μg/m3)in National Ambient Air Quality Standard during the sampling period.The pollution concentration of heavy metals in PM2.5 showed stable trend,which were Cu>Fe>Pb>Cr>Ni>Cd and Cu>Fe>Cr>Pb>Ni>Cd,respectively.The result of enrichment factor analysis showed that the EF values of Pb,Cd,Cu,Cr,Ni and Fe in PM2.5 were higher than 10,those elements came from man-made pollution sources obviously,and Cd and Cu were extremely enriched,the pollution may came from metal smelting or industrial coal combustion in urban area. |
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