中文关键词城镇化土地利用类型多环芳烃(PAHs)纵向分布源解析 英文关键词urbanizationland use typepolycyclic aromatic hydrocarbons (PAHs)vertical distributionsource apportionment

作者	单位	E-mail
鲁垠涛	北京交通大学土木建筑工程学院, 北京 100044 水中典型污染物控制与水质保障北京重点实验室, 北京 100044	luyt@bjtu.edu.cn
向鑫鑫	北京交通大学土木建筑工程学院, 北京 100044 水中典型污染物控制与水质保障北京重点实验室, 北京 100044
张士超	中国铁道科学研究院集团有限公司节能环保劳卫研究所, 北京 100081
刘明丽	华康昇泰环境科技有限公司, 北京 100088
王静	杭州华电华源环境工程有限公司, 杭州 310051
李爽	北京交通大学土木建筑工程学院, 北京 100044 水中典型污染物控制与水质保障北京重点实验室, 北京 100044
姚宏	北京交通大学土木建筑工程学院, 北京 100044 水中典型污染物控制与水质保障北京重点实验室, 北京 100044	yaohongts@163.com
孙绍斌	北京交通大学土木建筑工程学院, 北京 100044 水中典型污染物控制与水质保障北京重点实验室, 北京 100044

中文摘要 为研究城镇化过程中不同土地利用类型土壤中多环芳烃（PAHs）的纵向迁移特征，在快速进行城镇化建设的沈阳东部地区选择了3种不同土地利用类型（城市用地、耕地及林地）的5个土壤剖面（0~1 m），分析了土壤剖面层中PAHs的残留特征，讨论了影响PAHs纵向分布和迁移的因素以及土壤PAHs的来源.结果表明，5个采样点土壤表层ΣPAHs的含量为：城市1号点513.19~12689.04 μg·kg^-1、旱田点36.18~7196.10 μg·kg^-1、水田点70.92~747.53 μg·kg^-1、城市2号点19.39~636.47 μg·kg^-1和林地点4.79~349.24 μg·kg^-1.PAHs在城市用地和林地中主要被截留在0~30 cm浅层土壤中，在耕地可以迁移至较深的土壤层；高环数PAHs在浅层土壤层中所占比例较大，深层土壤低环数占比较高；土壤有机质与PAHs分布呈显著正相关，PAHs的理化属性对其迁移能力有一定影响；源解析表明，研究区域的PAHs主要来源于工业活动和交通等燃烧，部分低环数PAHs来自于石油产品输入. 英文摘要 To study the vertical distribution characteristics of polycyclic aromatic hydrocarbons (PAHs) in the soils from different land use types during urbanization, three land use types (urban land, cultivated land, and woodland) were selected in the eastern part of Shenyang, where urbanization is occurring rapidly. In each case, five soil samples were obtained from different depths (0-1 m). Change in the concentrations of PAHs, vertical migration factors, and the distribution and sources of PAHs were analyzed in the vertical soil profiles. Total concentrations of PAHs in the different soil type were ordered as follows:city 1 (513.19-12689.04 μg·kg^-1); dry field (36.18-7196.10 μg·kg^-1); paddy field (70.92-747.53 μg·kg^-1); city 2 (19.39-636.47 μg·kg^-1); and woodland (4.79-349.24 μg·kg^-1). PAHs were mainly trapped in shallow soils in urban and forest land, but can migrate deeper into the soil profile in cultivated land. High-ring PAHs were abundant at depths of 0-30 cm, while low-ring PAHs were abundant deeper in the soil profiles. SOM had a significant effect on the vertical distribution of PAHs, and the physical and chemical properties of PAHs had a significant influence on their migration ability. However, combustion sources from industrial activities and transportation in the region are still considered the main sources of PAHs despite the fact that some low-ring PAHs derive from petroleum product inputs.

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