摘要
农产品重金属污染已越来越为社会关注,为探明农作物、土壤和大气等镉污染与公路交通的关系,按不同采样距离采集高速、国道、省道和县级公路两侧农作物和土壤样品,检测Cd含量,并对高速公路路口、生活区和风景区空气自动监测站PM2.5和PM10样品中的Cd含量进行检测分析。结果表明,农作物Cd含量受公路交通影响的情况并不明显,所有监测农作物Cd含量均未超过绿色食品标准的限量规定;农作物中Cd的直接源头土壤和大气也未表现出受公路交通影响的趋势,所有采样点土壤Cd含量均在绿色食品标准的限量范围内,也无距路侧采样距离不同而发生变化的规律;高速公路出口附近PM2.5或PM10样品中Cd含量与生活小区或风景区相比无显著差异。
Heavy metal pollution in crops has aroused lots of public attentions.In order to verify the influence of road traffic on the Cadmium pollution of crops,Cadmium contents in crops and soils in different distances on the side of different roads,including expressway,national road,and county road were analyzed.Cd in PM2.5 or PM10 from the expressway exits,living quarters and beauty spots were also investigated.The results showed that the influence of road traffic on the Cd contents in crops were not significant.Cd contents in all of the crops detected met the green food criterion.Crops got Cd directly from soils or atmosphere.No evident effect of road traffic on Cd accumulation was found in soil or PM10 or PM2.5 samples.Cd contents in all of the soil samples met the green food criterion.There were no relationships between Cd contents in soils and the distances from roads.There were also no significant differences of Cd in PM2.5 or PM10 among the expressway exits,the living quarters and the beauty spots.
出处
《中国食物与营养》
2014年第10期13-17,共5页
Food and Nutrition in China
基金
宁波市农科教结合项目(项目编号:2011NK46)
浙江省公益性技术应用研究计划项目(项目编号:2012C23065)
宁波市科技局社会发展项目(项目编号:2011C50050)
