【摘要】 以江苏省的宁连高速公路两侧土壤和农产品为研究对象,分路段采集了公路两侧土壤及小麦样品进行监测,以了解高速公路两侧农田土壤及农产品中重金属的污染特征及污染程度。结果表明,宁连高速公路两侧200m范围内的土壤和小麦受到不同程度的重金属污染,其中土壤中Pb、C u、及N i的最大累积系数分别为1.94、1.82及1.69;小麦籽粒中Pb含量有随距离增加而下降的趋势,在距公路50m处受到的影响最大,采样范围内小麦籽粒Pb含量超标严重,最大超标倍数达3.5倍,而C d、C u及Zn无超标现象。由此可见,交通Pb污染是影响公路两侧土壤及农产品质量安全的主要因素。更多还原

【Abstract】 A survey study on heavy metals in soil and wheat samples was carried out in different sections of Ning-Lian Superhighway. The results showed that the soil and wheat are polluted with heavy metals at different levels. Pb contents in the soil and wheat seeds increased from south to north sections along the superhighway. The maximum accumulation coefficient of Pb, Cu and Ni in the soils is 1.94, 1.82 and 1.69, respectively. The Pb contents in wheat seeds exceed official standard seriously and the biggest one was 1.79 mg·kg-1. The maximumcontent of Pb was found in a sample located in 50 meters from superhighway. In terms of Zn, Cd and Cu contents in the seeds, none of them exceeded the officialstandard. It may be concluded that the transportation pollution is the main factor influencing the both safety of soil and quality of agricultural products.更多还原