城郊农田地表粉尘释放与城市大气污染相关性研究

The Correlation Research of the Suburban Farmland Surface Dust Emission and Urban Air Pollution

针对中国北方城市颗粒物污染比较严重的现实,选取城郊裸露期农田,分析地表粉尘释放与城区空气颗粒物污染的相关性,旨在探索城市大气污染的来源,为采取合理的防范措施提供技术依据。研究发现:西安城郊农田地表粉尘释放通量与城区平均能见度和城区PM10存在一定的相关性;西安空气中颗粒相及气相OCPs与农田地表土壤中OCPs各组分含量基本呈对应关系,说明西安市空气中的OCPs很大程度上来自农田土壤的粉尘释放。

In view of serious particulate pollution impact of northern china, suburban bare period farmland is chosen to analyze the correlation of the suburban farmland surface dust emission and urban air particulate pollution, aiming at exploring the sources of urban air patriciate pollution and providing reasonable precautions. The study shows： there are certain correlafions between Xi＇ an suburban farmland surface dust emission flux and the city average visibility and the PM10 concentration of the city. Research shows that, there is also corresponding relatiom among Xi＇an air particle phase OCPs and vapor phase OCPs with farmland surface soil OCPs, indicating Xi＇an air OCPs largdy comes from the agricultural soil dust emission.