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微波辅助萃取-液质联用技术测底泥砷、硒的化学形态

ISSN号：1000-0720
期刊名称：《分析试验室》
时间：0
分类：X513[环境科学与工程—环境工程]
作者机构：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China, [2]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China
相关基金：Acknowledgements This work was supported by the Chinese Academy of Sciences （approval code KJCX2-SW-No1） and the National Natural Science Foundation of China （Grant No. 10490182）.

作者：彭岚[1,2], 谈明光[1], 李玉兰[1], 张桂林[1], 陈建敏[1,2], 金婵[1,2], 李燕[1]

关键词：大气悬浮微粒, 形成, 铁, EXAFS, 回归分析, atmospheric particulate matter, speciation, iron, EXAFS,regression analysis.

中文摘要：

元素的种形成在上的学习大气参与物质(下午) 为理解污染的形成和起源并且评估他们的毒性是重要的。Inthis 纸，在大气的下午的铁的种形成与扩大 X 光检查吸收被调查好结构(EXAFS ) 系列基于同步加速器放射。下午的化学部件能被 EXAFS 系列的回归分析计算。这是一个非破坏性的方法。以便有对 EXAFS 系列的化学部件的影响的知识，我们准备了一系列混合参考书样品，并且证明方法的精确好。有不同粒子尺寸并且从不同采样地点的下午样品在上海被收集，中国。样品的化学部件被 EXAFS 系列的回归分析计算。结果证明铁在生病下午样品主要由 Fe_2O_3， Fe_3O_4 和 Fe_2 (SO_4 )_3，而是他们的比例组成在不同样品是不同的。在下午样品之中的部件的变化 preliminarily 被观察。在样品的铁的集中被 proton-inducedX-ray 排放(PIXE ) 决定技术。在工业区域多是的铁和钢的样品的铁的集中高与其它的那些也比另外的区域，和化学部件的那些不同，这被观察。

英文摘要：

The study on elemental speciation in atmospheric particulate matter （PM） is important for understanding the formation and origin of pollution and evaluating their toxicity. In this paper, the speciation of iron in atmospheric PM was investigated with extended X-ray absorption fine structure （EXAFS） spectra based on synchrotron radiation. The chemical components of PM can be calculated by regression analysis of EXAFS spectra. This is a non-destructive method. In order to have knowledge of the influence of chemical components on EXAFS spectra, we prepared a series of mixed reference samples, and proved the precision of method is good. The PM samples with different particle sizes and from different sampling sites were collected in Shanghai, China. The chemical components of the samples were calculated by regression analysis of EXAFS spectra. The results show that the iron in all PM samples mainly consist of Fe2O3, Fe3O4 and Fe2（SO4）3, but their proportions are different in different samples. The changes of components among PM samples were observed preliminarily. The concentrations of iron in the samples were determined by proton-induced X-ray emission （PIXE） technique. It is observed that the concentrations of iron in the samples of iron and steel industrial district were much higher than those of other districts, and chemical components were also different from those of others.

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