雷州湾表层沉积物中烃类有机物的分布、来源及风险评价
Distribution,source and risk assessment of hydrocarbons in surface sediments of Leizhou bay
郝连成 1代友旭 2胡延斌 3郑立龙 4冯永财4
作者信息
- 1. 中国地质调查局烟台海岸带地质调查中心,山东 烟台 264004;中国地质大学 海洋学院,北京 100083
- 2. 中国地质调查局烟台海岸带地质调查中心,山东 烟台 264004;中国地质大学 地球科学与资源学院,北京 100083
- 3. 中国地质调查局烟台海岸带地质调查中心,山东 烟台 264004;山东科技大学 地球科学与工程学院,山东 青岛 266590
- 4. 中国地质调查局烟台海岸带地质调查中心,山东 烟台 264004
- 折叠
摘要
为了解雷州湾海域表层沉积物中烃类有机污染状况,本研究于 2021年在雷州湾海域采集了20个站位的表层沉积物样品,采用气相色谱—质谱法和高效液相色谱法分析测定了其中正构烷烃和多环芳烃(PAHs)的含量,分析了它们的分布特征及来源,并对多环芳烃生态风险进行了评价.结果表明,雷州湾表层沉积物样品中正构烷烃的含量为 128～948 ng/g,PAHs含量为 4.63～28.66 ng/g,含量总体处于较低水平;特征参数比值显示,正构烷烃来源以陆源木本植物与草本植物为主,混合部分海源输入;数据显示雷州湾可能存在一定石油污染的威胁;PAHs以高分子量多环芳烃(4～6环)为主;比值法结果表明,PAHs主要来源于煤和木材的燃烧,其次为石油燃烧;效应区间法分析结果显示,雷州湾表层沉积物PAHs负面生态效应风险较低.
Abstract
In order to understand the status of hydrocarbon organic pollution in surface sediments of Leizhou bay,surface sediment samples from 20 stations were collected in 2021.The concentrations of n-alkanes and polycyclic aromatic hydrocarbons(PAHs)were determined by gas chromatography-mass spectrometry and high performance liquid chromatography,respectively and their distribution characteristics and sources were analyzed.The ecological risk of polycyclic aromatic hydrocarbons was evaluated.The results show that the contents of n-alkanes and PAHs are 128-948 ng/g and 4.63-28.66 ng/g,respectively,in the surface sediment samples of Leizhou bay,which is generally at a low level.The ratio of characteristic parameters show that n-alkanes are mainly derived from terrestrial woody plants and herbaceous plants,some of which are mixed with marine sources.Data show that there is a certain threat of oil pollution in Leizhou bay;PAHs are mainly composed of high molecular weight polycyclic aromatic hydrocarbons(4-6 rings).The results of ratio method show that most of PAHs come from coal and wood combustion,while a small amount from petroleum combustion.The results of effect interval analysis show that the risk of negative ecological effects of PAHs in surface sediments of Leizhou bay is low.
关键词
雷州湾/沉积物/正构烷烃/多环芳烃/风险评价Key words
Leizhou bay/sediment/n-alkanes/polycyclic aromatic hydrocarbons/risk assessment引用本文复制引用
基金项目
中国地质调查局项目(DD20208011)
中国地质调查局项目(DD20230073)
中国地质调查局项目(DD20230412)
出版年
2024
NETL
NSTL
维普
万方数据