摘要
对沈阳市城郊土壤中35种有机污染物进行了检测,分析了土壤有机污染检出特征和空间分布特征。沈阳市城郊土壤共检出了15种有机污染物;苯并(a)芘、六氯苯、滴滴涕和六六六的变异系数均大于1,其污染物浓度局部富集程度高,含量起伏变化大,土壤有机污染呈现"一多三少"的现象,即全区检出有机污染物的采样点多,检出的有机污染物种类较少,有机污染物含量少,且无超标点。受土壤包气带岩性影响,城郊土壤垂向上有机污染规律明显。土壤区域有机污染分布特征与城市土地利用功能一致性较高。分析了各类有机污染物含量和分布特征的主要影响因素,对防治城市土壤污染,进而保障居民的食品安全和饮水安全具有重要意义。
Based on the survey of 35 organic pollutants in the soils of Shenyang suburbs, this paper studied the detection characteristics of the pollutants and their spatial distribution characteristics. Fifteen of the 35 organic pollutants were detected, among which, benzopyrene, hexachloro-benzene, DDT, and BHC had the coefficients of variation 〉 1, and their local enrichment degree was high, with greater fluctuation in concentration. The soil organic pollution in the suburbs presented a pattern of ＂one more and three less＂, i. e. , more sampling points with detected organic pollutants, less kinds of detected organic pollutants, less concentration of the organic pollutants, and no sampling points exceeded the standards. Due to the effects of the lithology of soil vadose zone, the suburb soils showed an obvious vertical stratification pattern of organic pollution. It was considered that the regional distribution of suburb soil organic pollution had higher consistency with land use function, and thus, to analyze the main factors affecting the concentrations and distribution characteristics of organic pollutants in suburb soils would be of significance in preventing and controlling the organic pollution of the soils to ensure food security and water safety.
出处
《生态学杂志》
CAS
CSCD
北大核心
2011年第11期2472-2477,共6页
Chinese Journal of Ecology
基金
中国地质调查局地质调查项目(1212010913004)资助
关键词
城郊土壤
检出特征
分布特征
suburb soil
detected characteristics
distribution characteristics.
