Finizio A, Villa S, Raffaele F, Vighi M
Department of Environmental Sciences, University of Milano Bicocca, Piazza della Scienza 1, I-20126, Milan, Italy.
Ecotoxicol Environ Saf. 2006 Jan;63(1):25-32. doi: 10.1016/j.ecoenv.2005.05.004. Epub 2005 Jul 22.
To understand better the mechanisms ruling the fate of POPs (persistent organic pollutants) in cold environments, a field campaign sampling fresh-fallen snow and air on an Alpine glacier was carried out during Summer 2003. The concentrations of all analyzed chemicals in fresh-fallen snow show a sharp decrease over time, particularly for the more volatile POPs, confirming the rather limited literature evidence of a rapid decline of such substances from the snowpack and/or ice. Even if the results presented here are preliminary and should be confirmed by further studies, some evidence of the influence of a night/day cycle of temperature on POP deposition and revolatilization mechanisms has been highlighted. Finally, the role of cold condensation and long-range atmospheric transport in the contamination of higher altitudes in this Alpine system has been substantiated, particularly for OC pesticides.
为了更好地理解在寒冷环境中持久性有机污染物（POPs）归宿的控制机制，2003年夏季在阿尔卑斯冰川上开展了一项野外活动，对新降积雪和空气进行采样。新降积雪中所有分析化学品的浓度随时间急剧下降，尤其是挥发性更强的POPs，这证实了关于此类物质从积雪和/或冰层中快速下降的文献证据相当有限。即使此处给出的结果是初步的，需要进一步研究加以证实，但已突出显示了温度昼夜循环对POP沉降和再挥发机制影响的一些证据。最后，证实了冷凝聚和长距离大气传输在该高山系统高海拔地区污染中的作用，特别是对有机氯农药而言。
