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大气颗粒物中微量营养元素Fe、Mn和Cu的来源与沉降

The sources and deposition of three trace nutritional elements Fe,Mn and Cu in the atmospheric particulate

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【作者】 余新安翁焕新张兴茂陈立红陈祥华

【Author】 YU Xin-an,WENG Huan-xin,ZHANG Xing-mao,CHEN Li-hong,CHEN Xiang-hua(Institute of Environment & Biogeochemistry,Zhejiang University,Hangzhou 310027,China)

【机构】 浙江大学环境与生物地球化学研究所浙江大学环境与生物地球化学研究所 浙江杭州310027浙江杭州310027

【摘要】 测定了义乌市大气颗粒物中总悬浮颗粒物(TSP)及微量营养元素Fe、Mn和Cu的浓度,并对颗粒物粒径分布和外形进行了扫描电镜分析,同时分析了这3种金属的来源和沉降量。结果表明,微量营养元素Fe和Mn主要来源于地壳,而Cu来源于人为污染;Fe与Mn之间的相关性极显著;绝大部分颗粒物的粒径小于9μm;Fe和Mn湿沉降量大于干沉降量,而Cu以干沉降为主。

【Abstract】 That atmospheric depositions of the three trace nutritional elements are regarded as an important source of the water body is often neglected.In this study the concentrations of the TSP and the three trace elements Fe,Mn and Cu were detected,and the distribution of the particle size was analyzed by scanning electron microscope,then the sources and the depositions of the three trace elements were analyzed.The results showed that Fe and Mn mainly originated from the earth’s crust,but Cu mainly originated from man-made pollution,and the significant correlation was determined between Fe and Mn.Most of the particle sizes were less than 9 μm,The wet depositions of Fe and Mn were higher than the dry deposition,but for Cu,it was opposite.

【关键词】 大气颗粒物FeMnCu来源粒径大小大气沉降
【Key words】 atmospheric particulateFeMnCusourceparticle sizeatmospheric deposition
【基金】 国家自然科学基金资助项目(40172106)
  • 【分类号】X513
  • 【被引频次】13
  • 【下载频次】457
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