| 城市交通干道降雨径流中PAHs的污染特征 |
| |
| 引用本文： | 韩景超,毕春娟,陈振楼,吕金刚,周婕成.城市交通干道降雨径流中PAHs的污染特征[J].环境科学学报,2012,32(10):2461-2469. |
| |
| 作者姓名： | 韩景超 毕春娟 陈振楼 吕金刚 周婕成 |
| |
| 作者单位： | 华东师范大学资源与环境科学学院,地理信息科学教育部重点实验室,上海200062 |
| |
| 基金项目： | 国家重大水专项课题(No.2009ZX07317-006);国家自然科学基金(No.40971259);上海市优秀学科带头人计划(No.10XD1401600) |
| |
| 摘 要： | 以上海、温州市典型交通干道地表径流为研究对象,分析了样品中16种溶解态和颗粒态PAHs浓度,了解了城市交通干道降雨径流中PAHs污染特征及其动态变化过程.结果表明,径流中∑PAHs(包括溶解相、颗粒相)浓度范围为919.8～16711.6ng·L-1,溶解相中PAHs浓度要远低于颗粒相(分别为4.9～1558.0ng·L-1,635.4～16624.0ng·L-1).通过对3场降雨事件中PAHs浓度随降雨过程变化的研究,可以发现并不是所有道路径流都有初期冲刷效应,初期冲刷的产生受雨前干期、降雨强度以及径流量等因素共同作用,因此简单拦截初期径流并不能十分有效地降低PAHs污染负荷.径流中PAHs在颗粒相-水相间的分配系数Kp值为2.3×104～2.5×106L·kg-1,随着悬浮颗粒物含量增加而减少,这可能跟径流过程中颗粒物粒径组成有关.
|
| 关 键 词： | PAHs 城市道路径流 降雨事件平均浓度 污染特征 初始冲刷效应 |
| 收稿时间： | 2011/11/19 0:00:00 |
| 修稿时间： | 3/9/2012 12:00:00 AM |
Pollution characteristics of PAHs in urban runoffs from main roads in urban area |
| |
| HAN Jingchao,BI Chunjuan,CHEN Zhenlou,L&#; Jingang and ZHOU Jiecheng.Pollution characteristics of PAHs in urban runoffs from main roads in urban area[J].Acta Scientiae Circumstantiae,2012,32(10):2461-2469. |
| |
| Authors: | HAN Jingchao BI Chunjuan CHEN Zhenlou L&#; Jingang and ZHOU Jiecheng |
| |
| Institution: | Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environmental Science, East China Normal University, Shanghai 200062;Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environmental Science, East China Normal University, Shanghai 200062;Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environmental Science, East China Normal University, Shanghai 200062;Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environmental Science, East China Normal University, Shanghai 200062;Key Laboratory of Geo-information Science of the Ministry of Education, College of Resources and Environmental Science, East China Normal University, Shanghai 200062 |
| |
| Abstract: | Road runoff samples were collected from two typical roads in Shanghai and Wenzhou city during the rainy season in 2010.Sixteen PAHs in both dissolved and particulate phases in runoff samples were analyzed in order to characterize the PAHs dynamic transportation between two phases in runoff samples.PAH concentrations in runoff samples varied from 919.8 to 16711.6 ng·L-1.Dissolved PAH concentrations (4.9~1558.0 ng·L-1) were much lower than those in particulates (635.4~16624.0 ng·L-1).PAH concentration variations were investigated during three rainfall events,and the first flush effect (FFE) was not obvious during all of the runoff events.The occurrence of an FFE was dependent on multiple factors including pre-rain dry period,rainfall intensity,runoff volume,etc.Therefore,the initial runoff interception may not control the PAH contaminations in urban road runoff effectively.Partition coefficient (Kp) values changed from 2.3×104 to 2.5×106 L·kg-1.Kp values decreased with the total suspended solid (TSS) contents in the road runoff samples,which could be related to the particle size fractions in the runoff. |
| |
| Keywords: | PAHs urban road runoff event mean concentration pollution characteristics first flush effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《环境科学学报》浏览原始摘要信息 |
| 点击此处可从《环境科学学报》下载免费的PDF全文 |
|
