沈阳郊区土壤及农产品重金属污染的现状评价

Heavy metal pollution of soil and agricultural products in shenyang suburbs:current situation

本文对沈阳郊区三个农产品生产区域的土壤及农产品中的七种重金属进行检测 ,用两种方法 (土壤环境质量标准和土壤背景值标准 )进行评价 ,结果表明 :沈阳地区土壤已经受到了不同程度的污染 ,污染较重的元素是镉和汞 ,以土壤环境质量标准评价其综合污染指数分别为 2 51和 2 89;以土壤背景值为标准评价其综合污染指数为分别为 1 9 4 6和 1 3 56.农产品中主要超标元素为铅 ,沈阳郊区的白菜超标率 1 0 0 % ;超标倍数 3 9.水稻中铅的检出率 1 0 0 % ;超标倍数 1 8.

We determied the concentrations of heavy metals in representative soils and agricultural products in shanyang suburbs and evaluation was made by using both standards of soil environmental quality and background values. The results indicated that the soils were polluted to different extend and Cd and Hg were most obvious. The pollution in dexes for the two elements, based on the soil environmental quality standard, were 2 51 and 2 89respectively, while those, based on the background value standard, were 19 46 and 13 56respectively. The percentage of heavy metal pollution in chinese cabbages was 100%, being 3 9 times higher than normal. Lead was detectable in all rice samples, being 1 8 times higher than normal.