| 城市不同下垫面降雨径流多环芳烃（PAHs）分布及源解析 |
| 摘要点击 4815 全文点击 1933 投稿时间：2014-04-23 修订日期：2014-05-31 |
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| 中文关键词 PAHs 降雨径流 EMC 初始冲刷 源解析 |
| 英文关键词 PAHs rainfall runoff EMC first flush effect source identification |
| 作者 | 单位 | E-mail | | 武子澜 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | wu.zi.lan@163.com | | 杨毅 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | | | 刘敏 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | mliu@geo.ecnu.edu.cn | | 陆敏 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | | | 于英鹏 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | | | 汪青 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241
安徽师范大学地理系, 芜湖 241003 | | | 郑鑫 | 华东师范大学资源与环境科学学院地理系, 地理信息科学教育部重点实验室, 上海 200241 | |
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| 中文摘要 |
| 以上海市不透水下垫面降雨径流为研究对象，分析了交通道路、校园、小区路面和小区屋面径流样品中 16种溶解相、颗粒相 PAHs质量浓度和场次降雨事件平均浓度（EMC）.研究了不同下垫面降雨径流 PAHs冲刷过程.通过对不同样点降雨径流初始冲刷散点进行幂函数拟合，定量表征了降雨径流 PAHs和悬浮颗粒物（TSS）的初始冲刷强度.对径流样品中 PAHs来源进行了分析.结果表明，径流样品 ∑16PAHs（包括溶解相和颗粒相）质量浓度变化范围为317.21~10364.32 ng·L-1，其中龙吴路 ∑16PAHs质量浓度（均值）最大，而校园最小.污染物的 EMC值在不同样点具有很大的差异.不同样点 PAHs含量在径流过程中皆呈现出明显的衰减特征，并显示出不同程度的初始冲刷效应.运用因子分析方法解析 PAHs来源发现，降雨径流 PAHs来自化石燃料的不完全燃烧、石油泄漏、炼焦等，且各源的贡献率在不同下垫面降雨径流中有差异. |
| 英文摘要 |
| Runoff samples were collected from traffic roads, campus, residential road and roof in a typical rain event. Polycyclic aromatic hydrocarbons (PAHs) in both dissolved and particle phases were investigated at impervious surfaces. The PAHs wash-off process at different monitoring sites was analyzed. The scatters of first flush were conducted in a method of fitting power function to quantitatively assess the magnitude of first flush effect (FFE). The sources of PAHs were identified using factor analysis. The results showed that PAHs concentrations in runoff samples varied from 317.21 ng·L-1 to 10364.3 ng·L-1 with the maximal and minimal contents of PAHs found on Longwu Road and campus, respectively. The values of event mean concentration (EMC) varied considerably at different sampling sites. The concentration of washed-off pollutant generally decreased with runoff duration, which showed an obvious attenuation trend. The runoff process indicated the occurrence of FFE at different levels. PAHs mainly came from the incomplete combustion of fossil fuels, oil leakage and coking, and the contribution of each source was different in accordance with various surfaces. |
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