汕头红树林湿地沉积物多环芳烃垂直分布特征

生态学杂志 ›› 2009, Vol. 28 ›› Issue (12): 2553-2560.

汕头红树林湿地沉积物多环芳烃垂直分布特征

伍卡兰^1,2;曹启民^1,2;陈桂珠^1,2**

¹中山大学环境科学与工程学院广东省污染控制与修复技术重点实验室|广州 510275；²中山大学湿地研究中心|广州 510275

出版日期:2009-12-10 发布日期:2009-12-10

Vertical distribution patterns of polycyclic aromatic hydrocarbons in Shantou mangrove wetland sediments.

WU Ka-lan^1,2|CAO Qi-min^1,2;CHEN Gui-zhu^1,2

¹Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun YatSen University, Guangzhou 510275, China|²Wetland Research Center, Sun Yat-Sen University, Guangzhou 510275, China

Online:2009-12-10 Published:2009-12-10

摘要/Abstract

摘要： 采集了汕头国际湿地核心区红树林表层沉积物上层(0～10 cm)和下层(10～20 cm)样品，用超声溶剂萃取和GCMS法分析了沉积物中的多环芳烃(polycyclic aromatic hydrocarbons, PAHs)、有机碳、黑碳和粒径的组成。结果显示，沉积物上、下层均以4环PAHs的含量最高，不同环数PAHs表现为中环数含量较高，低环和高环含量较低；上层∑PAHs含量明显大于下层，同时沉积物上层∑PAHs含量、有机碳和黑碳及粘粒、粉砂的质量分数均高于下层；pH没有变化。相关性分析显示，沉积物上、下层中的有机碳与∑PAHs含量无相关关系，黑碳、∑PAHs含量和粉砂表现为两两显著相关，表明沉积物中粉砂是影响PAHs在沉积物中行为和归宿的重要因素，而黑碳是形成分层效应的根本影响因素。

关键词: 旱塬, 苹果园, 干燥化, 硝态氮累积

Abstract: Sediment samples at 0-10 cm and 10-20 cm depths were collected from Shantou mangrove wetland, and their particle sizes and the contents of polycyclic aromatic hydrocarbons (PAHs), organic carbon, and black carbon were determined by the methods of ultrasonic solvent extraction and GC-MS. The two sediment layers were dominated by 4-ring PAHs, followed by moderate molecular weight PAHs, and lower or molecular weight PAHs. The contents of PAHs, organic carbon, and black carbon, and the percentages of silt and clay were higher in 0-10 cm than in 10-20 cm layer, but the pH value had no difference between the two layers. Correlation analysis showed that in the two layers, PAHs content had no correlation with organic carbon content but significantly correlated with black carbon content (P<0.01), and significant correlations were observed among the contents of silt, black carbon, and PAHs (P<0.05), suggesting that silt content was the main factor affecting the PAHs distribution in Shantou mangrove sediments, and black carbon could be the essential factor for the stratification of PAHs in different sediment layers.

Key words: Dryland, Apple orchard, Desiccation, Nitrate accumulation

伍卡兰;曹启民;陈桂珠. 汕头红树林湿地沉积物多环芳烃垂直分布特征[J]. 生态学杂志, 2009, 28(12): 2553-2560.

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