摘要
在广州市的石化企业、发电厂、高速公路、机场等典型工业、交通区采集了28个表层土壤，分析其中多环芳烃（PAHs）的含量水平和组成特征，并初步评价和揭示土壤PAHs的污染程度和来源。结果表明：研究区表层土壤中PAHs含量分布存在较大的变异性，PAHs总含量分布于未检出～5543．5μg／k之间；单种PAH中芴（Flu）、荧蒽（Fla）、[艹屈]（Chr）和苯并[b]荧蒽（Bbf）的检出率较高，均在70％以上；采自废弃化肥厂遗址及旧机场的部分土壤受PAHs污染的程度相对较严重，PAHs的残留程度明显高于其他采样区的土壤；各采样区土壤中PAHs的组成以4环及4环以上化合物为主；根据PAHs的组成特征及Fla／Pyr特征比值可以初步推测高温燃烧排放是大部分研究区土壤中PAHs的主要污染来源之一。
The concentrations, composition patterns and sources of polycyclic aromatic hydrocarbons （PAHs） are quantified and explored in twenty-eight surface soil samples collected from typical industrial sites and traffic sites in Guangzhou. The results show that there is a high variability in the total PAHs concentrations in soil samples, ranging from not detected to 5543.5 μg/kg dry weight. The most frequent detected PAH compounds in soil samples are fluorene, fluoranthene, chrysene and benzo [ b] fluoranthene with detection ratios of above 70%. The part of soils from an abandoned fertilizer plant production area and an abandoned airfield are contaminated by PAHs with obvi- ous higher levels of PAHs than those in soils from nearby industrial areas or highway. PAHs composition patterns in soils of all sampling areas are characterized mainly by compounds with four-ring and more than four-ring. According to the composition characteristics of PAHs and fluoranthene/pyrene （Fla/Pyr） ratio, one of the dominant PAHs sources in study areas is preliminarily inferred to be pyrolysis.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第1期93-97,共5页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
广东省自然科学基金资助项目(04009791)
中山大学青年教师科研启动基金资助项目
广东省环境污染控制与修复技术重点实验室开放研究基金资助项目(2006K0018)
关键词
多环芳烃
土壤
来源
组成特征
Polycyclic aromatic hydrocarbons （PAHs）
soil
source
composition characteristics
