有机碳对土壤中有机氯污染物分布特征的影响  

Effect of Organic Carbon Contents on Organochlorine Pollutant Distribution Characteristics in Soil of Pristine Mountain Area

作　　者：刘文杰[1,2] 刘咸德[1] 陈大舟[3] 郑晓燕[1,4] 李炳伟[1] 李慧颖[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]中国科学院寒区旱区环境与工程研究所,黑河生态水文与流域科学重点实验室,甘肃兰州730000 [3]国家标准物质研究中心,北京100013 [4]中国科学院生态环境研究中心,环境化学与生态毒理学国家重点实验室,北京100085

出　　处：《环境科学研究》2010年第6期726-732,共7页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划(973)项目(2003CB415003);中国环境科学研究院院所基金项目(N2009KYYW13)

摘　　要：为了研究清洁地区土壤中w(OC)对有机氯污染物分布特征的影响,选择2006年春秋季采集于四川卧龙自然保护区高海拔地区的25个土壤样品,利用GC-HRMS方法测试有机氯污染物的残留量,利用回归分析方法研究有机氯污染物质量分数与w(OC)和海拔高度之间的关系.结果表明:卧龙自然保护区有机氯污染物的质量分数均小于1 ng/g,与世界上其他边远地区的非农业土壤相似;土壤中w(OC)对有机氯污染物的分布特征有重要影响,分析的10种有机氯污染物质量分数〔以w(OC)校正〕与海拔高度均表现出较好的指数相关,且具有显著的统计学意义;有机氯污染物的质量分数〔以w(OC)校正〕随海拔高度上升而增加,表现出明显的"冷捕集"效应.因此,在研究清洁地区土壤中有机氯污染物的分布特征时,以w(OC)进行校正是合理和重要的.In order to study the effect of soil organic carbon contents on the distribution characteristics of organochlorine pollutants in pristine mountain area,25 soil samples were collected at high altitude sites in both spring and autumn of 2006 in Wolong Nature Reserve.Typical organochlorine pollutants were measured by gas chromatography-high resolution mass spectrometry.Regression analysis was used to study the relationship between organochlorine pollutants and organic carbon contents as well as the altitude.The results showed that the concentrations of organochlorine pollutants were less than 1（ngg） in the Wolong Nature Reserve,which was similar to those of non-agricultural soils in other remote areas in the world.There is significant impact of the soil organic carbon contents on the distribution characteristics of organochlorine pollutants.The concentrations after organic carbon calibration for the ten organochlorine pollutants revealed a good exponential relationship to altitude,and positive coefficients showed significant statistical significance,exhibiting an obvious ＂cold-trapping＂ phenomenon.Therefore,it was reasonable and important to use organic carbon contents to calibrate the concentrations of organochlorine pollutants for this kind of study.

关 键 词：有机碳 有机氯污染物 冷捕集 回归分析 土壤 

分 类 号：X53[环境科学与工程—环境工程]