Smith K E, Jones K C
Environmental Science Department, Institute of Environmental and Natural Sciences, Lancaster University, UK.
Sci Total Environ. 2000 Feb 10;246(2-3):207-36. doi: 10.1016/s0048-9697(99)00459-3.
This paper presents a comprehensive review of the mechanisms responsible for the transfer of atmospheric particulate deposition and soil particulate re-suspension onto vegetation. The nature of atmospheric aerosols and dry/wet particulate deposition are reviewed, together with information from the literature on radionuclides as tracers of the air particle/soil particle to vegetation transfer processes. Information from these fields is used to make inferences about the potential significance of these pathways in supplying particle-bound semi-volatile organic chemicals (e.g. polycyclic aromatic hydrocarbons, polychlorinated dibenzo-p-dioxins and dibenzofurans, polychlorinated biphenyls) to vegetation. Retention of compounds on particles brought to the above-ground plant surfaces is discussed. In the absence of definitive field/experimental studies, calculations are made drawing on the literature data to estimate the contributions of atmospheric and soil particle-bound organic contaminants to the plant concentration. These show that depending on the site-specific, species-specific and compound-specific scenarios considered, particulate-bound inputs may be negligible or may dominate the supply of organic contaminants to the above-ground portion of plants. However, field/experimental studies and direct measurements are needed to provide reliable quantitative data on this topic.
本文全面综述了大气颗粒物沉降和土壤颗粒物再悬浮至植被表面的相关机制。文中回顾了大气气溶胶的性质以及干湿颗粒物沉降，并结合文献中有关放射性核素作为空气颗粒/土壤颗粒向植被转移过程示踪剂的信息。利用这些领域的信息来推断这些途径在向植被供应颗粒结合态半挥发性有机化合物（如多环芳烃、多氯二苯并 - 对 - 二恶英和二苯并呋喃、多氯联苯）方面的潜在重要性。文中还讨论了化合物在带到地上植物表面的颗粒上的保留情况。在缺乏明确的实地/实验研究的情况下，利用文献数据进行计算，以估计大气和土壤颗粒结合态有机污染物对植物体内浓度的贡献。结果表明，根据所考虑的特定地点、特定物种和特定化合物的情况，颗粒结合态输入可能微不足道，也可能在向植物地上部分供应有机污染物方面占主导地位。然而，需要实地/实验研究和直接测量来提供关于这一主题的可靠定量数据。
