Extraction of the Residual Polycyclic Aromatic Hydrocarbons in the Long-term Contaminated Soil in the Field  

野外长期污染土壤中残留多环芳烃的提取(英文)

作　　者：张铁军[1] 李晓军[2] 杨辉[3] 王善仙[2,4] 图影[2] 

机构地区：[1]内蒙古科技大学能源与环境学院环境工程系,内蒙古包头014010 [2]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [3]吉林师范大学旅游与地理科学学院,吉林四平136000 [4]中国科学院研究生院,北京10039

出　　处：《Agricultural Science & Technology》2010年第9期153-156,共4页农业科学与技术（英文版）

基　　金：Supported by Important Direction Project of Knowledge Innovation Program in Chinese Academy of Science(KZCX2-YW-446)~~

摘　　要：[Objective] The aim of this study was to find a better method to exactly quantify the residual polycyclic aromatic hydrocarbons（PAHs）in the long-term contaminated soil in the field so as to provide basis for the remediation for PAHs contaminated soil.[Method]The comparisons of soxhlet extraction,ultrasonic extraction and shaking extraction were studied in the agricultural soil irrigated with oil sewage over a long period of time.[Result]The total PAHs extracted by soxhlet extraction were the highest（6 873.7 μg/kg）,followed by shaking extraction（6 698.8 μg/kg）and ultrasonic extraction（5 737.6 μg/kg）.Among these methods,the highest extracted 4 and 6 rings PAHs were in the soxhlet extraction,the highest extracted 2 and 5 rings PAHs were in the shaking extraction,and the highest extracted 3 rings PAHs were in the ultrasonic extraction.[Conclusion]This study had provided basis for the selection of the assessment method of residual PAHs in the field soil.[目的]准确定量野外污染土壤中残留的PAHs,为PAHs污染土壤的修复提供依据。[方法]针对长期石油污水灌溉农田土壤,对比了常用PAHs提取方法(索氏、震荡和超声提取方法)的提取效率差异。[结果]索氏提取法对土壤中总PAHs的可提取量最高(6873.7μg/kg),其次为往复震荡提取法(6698.8μg/kg),超声提取法最低(5737.6μg/kg),约为前2种提取方法的84%左右;相对于其他提取方法,索氏提取对4环和6环PAHs的提取效率最高,震荡提取对2环和5环PAHs的提取效率最高,超声萃取仅对3环PAHs提取效率最高。[结论]该研究为野外污染土壤中残留PAHs定量评价方法的选择提供了技术支持。

关 键 词：Polycyclic aromatic hydrocarbons Soil Soxhlet extraction Ultrasonic extraction Shaking extraction 

分 类 号：X53[环境科学与工程—环境工程]