大气降尘样品中多环芳烃采样方法综述

发布时间：2018-01-16 05:27

本文关键词：大气降尘样品中多环芳烃采样方法综述?　出处：《山西农业大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：[目的]归纳总结现有大气降尘的采样方法,为今后采集降尘样品的学者提供参考;并在此基础上,提出建立相对统一的降尘采集标准方法与规范我国降尘采集的建议,以提高降尘研究结果的可比性。[方法]本文对大气降尘样品采集中采样点个数及其位置选取的条件和原则、采样时间的选择与周期的确定、采样装置材质及形状的选取和采样器内固定降尘样品介质的类型等现有大气降尘采样方法中的一系列条件与要求进行了综述。[结果]采样点位置的选取要以没有遮挡物且避免周围物质起尘的影响为原则;采样时间与周期的选取因研究目的不同有所差异;采集装置通常使用玻璃漏斗、圆柱形玻璃罐、不锈钢桶、金属平板等;根据集尘容器内固定降尘介质的不同,目前常用的收集方法分为干法、湿法和玻璃球法3种。[结论]合理地选择降尘采样点、采集方法和采样周期是研究大气降尘中多环芳烃的基础,在实际工作中可以根据研究目的及实际情况选择合适的采集方法,并且急需出台一套完整规范的降尘采集标准。
[Abstract]:[Objective] to summarize the existing sampling methods of atmospheric dust fall, and to provide reference for the scholars who collect dust fall samples in the future. On the basis of this, the paper puts forward a relatively unified standard method for dust fall collection and some suggestions for standardizing dust fall collection in China in order to improve the comparability of dust control research results. [Methods] in this paper, the selection conditions and principles of the number of sampling points and their location, the selection of sampling time and the determination of the period in the collection of atmospheric dust samples were discussed. The selection of material and shape of sampling device and the type of fixed dust sample medium in sampler are reviewed. [Results] the selection of sampling points should be based on the principle that there is no occlusion and the influence of dust on the surrounding material should be avoided. The selection of sampling time and period is different from each other. Collecting devices usually use glass funnel, cylindrical glass tank, stainless steel barrel, metal plate, etc. According to the difference of the fixed dust control medium in the dust collecting vessel, the commonly used collecting methods are dry method, wet method and glass ball method. [Conclusion] the sampling method and sampling period are the basis of the study of PAHs in the atmospheric dustfall, and the appropriate sampling method can be selected according to the research purpose and the actual situation in the practical work. And urgent need to issue a complete set of standard dust collection standards.
【作者单位】：山西农业大学资源环境学院;
【基金】：国家自然科学基金项目(41271507)
【分类号】：X513;X831
【正文快照】： 多环芳烃(Polycyclic aromatic hydrocarbons PAHs)是指一组具有两个或多个苯环的有机物,因为他们的致癌性和致突变性,以及对生态系统和人类健康后续的不利影响而受到广泛的关注[1]。大量的调查表明,PAHs在各种环境介质中是无处不在的[2,3]。降尘一般是指依靠重力作用自然沉降

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