地理学报 ›› 2008, Vol. 63 ›› Issue (5): 535-543.doi: 10.11821/xb200805009

• 沉积环境 • 上一篇    下一篇

基于多参数指标的长江口滨岸多环芳烃来源辨析

欧冬妮1, 刘敏1, 许世远1, 程书波1, 侯立军2, 王丽丽1   

  1. 1. 华东师范大学资源与环境科学学院, 教育部地理信息科学重点实验室, 上海200062;
    2. 华东师范大学河口海岸学国家重点实验室, 上海200062
  • 收稿日期:2007-12-06 修回日期:2008-02-26 出版日期:2008-05-26 发布日期:2010-08-03
  • 通讯作者: 刘敏, 教授, E-mail: mliu@geo.ecnu.edu.cn E-mail:mliu@geo.ecnu.edu.cn
  • 作者简介:欧冬妮(1979-), 女, 福建泉州人, 博士, 主要从事河口生物地球化学研究。E-mail: odn79@yahoo.com.cn
  • 基金资助:

    国家自然科学基金项目(40671171; 40131020); 高等学校博士学科点专项科研基金(20040269014); 上海市博 士后基金项目(07R214120)

Polycyclic Aromatic Hydrocarbons Sources Identification Based on Multiple Indices from the Yangtze Estuarine and Nearby Coastal Areas

OU Dongni1, LIU Min1, XU Shiyuan1, CHENG Shubo1, HOU Lijun2, WANG Lili1   

  1. 1. Key Laboratory of Geographic Information Science of the Ministry of Education, School of Resources and Environment Science, East China Normal University, Shanghai 200062, China;
    2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
  • Received:2007-12-06 Revised:2008-02-26 Online:2008-05-26 Published:2010-08-03
  • Supported by:

    National Natural Science Foundation of China, No.40671171; No. 40131020; Doctoral Program of MOE, No.20040269014; Shanghai Postdoctoral Foundation, No.07R214120

摘要:

在长江口滨岸及临近排污口、滨岸河流、城市中心城区采集悬浮颗粒物、表层沉积物、街道灰尘等样品, 分别利用GC-MS 和GC-C-IRMS 定量分析了不同环境介质中的多环芳烃 (PAHs) 与有机单体化合物稳定碳同位素(δ13C), 开展了基于PAH 环数、分子量特征比值和有机单体化合物稳定碳同位素组成等参数指标的长江口滨岸悬浮颗粒物与表层沉积物中PAHs 源解析研究。研究结果显示, 长江口滨岸悬浮颗粒物与表层沉积物中的PAH 化合物主要以3~4 环为主, 与吴淞排污口、石洞口污水处理厂、黄浦江、滨岸小河流以及上海中心城区等潜在来源区域不同环境介质中的PAHs 组成特征相似, 主要来源于汽油、柴油、煤炭和木材的不完全燃烧以及石油残余物的混合。其中, 木材和煤炭不完全燃烧形成的PAHs 以及石油残余物, 枯季经过滨岸河流及排污口直接输入, 洪季则为城市街道灰尘被暴雨冲刷, 随地表 径流最终汇入河口; 汽车排放(汽油、柴油不完全燃烧) 产生的PAHs 主要富集在城市交通区和商业区的街道灰尘中, 枯季借助区域盛行风迁移至河口区, 洪季则主要通过暴雨径流冲刷进入河口。

关键词: PAHs, 源解析, 单体化合物稳定碳同位素, 分子量特征比值, 长江口

Abstract:

Samples of suspended particulate matters (SPMs), surface sediment and road dusts were collected in the Yangtze estuarine and nearby coastal areas, coastal rivers, and Shanghai metropolitan area, respectively. Sixteen polycyclic aromatic hydrocarbons (PAHs) in the USEPA priority-controlled list were determined by GC-MS and compound-specific stable carbon isotopes of individual PAHs were analyzed by GC-C-IRMS. PAHs sources of SPMs and surface sediments in the Yangtze estuarine and nearby coastal areas were examined using multiple source identification techniques which integrated molecular mass indices with organic compound-specific stable isotopes. The results showed that the third and fourth rings PAH compounds were dominant in SPMs and surface sediments, similar to those in Wusong sewage discharge outlet, Shidongkou sewage disposal plant, Huangpu River, coastal rivers and Shanghai metropolitan area. Principal component analysis (PCA) integrated with molecular mass indices indicated that gasoline, diesel oil, coal and wood combustion and petroleum were the main sources for PAHs in the Yangtze Estuary. Use of PAH compound-specific stable isotopes tracked PAHs input pathways. PAHs derived from wood and coal combustion and petroleum were input into the Yangtze estuarine and nearby coastal areas by coastal rivers, sewage discharge outlets in dry season and urban storm water runoff in flood season. PAHs derived from vehicle emissions were mainly accumulated in road dusts from urban traffic lines and commercial district, which entered the coastal area by the northwest prevailing wind in dry season and storm water runoff in flood season.

Key words: PAHs, source identification, compound-specific stable isotope, molecular mass ratio, the Yangtze Estuary