引用本文:张玉凤,吴金浩,宋永刚,杨萌,赵海勃,李楠,关道明,等.辽东湾海水中PAHs分布与来源特征及风险评估[J].环境科学研究,2017,30(6):892-901.
ZHANG Yufeng,WU Jinhao,SONG Yonggang,YANG Meng,ZHAO Haibo,LI Nan,GUAN Daoming,et al.Distribution, Sources and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons in Surface Seawater in Liaodong Bay, China[J].Reserrch of Environmental Science,2017,30(6):892-901.]
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辽东湾海水中PAHs分布与来源特征及风险评估
张玉凤1,2,3, 吴金浩1,2, 宋永刚1,2, 杨 萌4, 赵海勃1,2, 李 楠1,2, 关道明3,5
1.辽宁省海洋水产科学研究院, 辽宁 大连 116023 ;2.辽宁省海洋环境监测总站, 辽宁 大连 116023 ;3.中国海洋大学化学化工学院, 山东 青岛 266100 ;4.大连市环境监测中心, 辽宁 大连 116023 ;5.国家海洋环境监测中心, 辽宁 大连 116023
摘要:
为研究辽东湾海水中PAHs(多环芳烃)的分布、来源与生态风险状况,分别于2014年和2015年对辽东湾及其海上石油开发活动密集区表层海水样品中16种PAHs进行了调查研究,通过统计学分析方法对调查结果进行分析,并采用风险商值法对辽东湾海水中PAHs的生态风险进行评估. 结果表明:辽东湾海域及其海上石油开发活动密集区海水中ρ(∑PAHs)平均值5月和6月明显高于8月,其中ρ(Nap)(Nap为萘)最高,为20.6~288.5 ng/L;其次为ρ(Phe) (Phe为菲),为19.2~59.5 ng/L. 表层海水中PAHs均属于轻度-中度污染,高值区主要分布在辽东湾西南部海域、辽河口和大辽河口附近海域以及金州湾和普兰店湾附近海域,海水中低分子量芳烃占主导优势;异构体比值分析表明,辽东湾海水中PAHs存在石油来源;BbF(苯并荧蒽)为高风险PAHs单体,高分子量芳烃对生态风险贡献最大,贡献百分比为50%~82%. 研究显示,辽东湾海域及其海上石油开发活动密集区均属于中等生态风险.
关键词:  辽东湾  海水  多环芳烃  来源  生态风险
DOI:
分类号:
基金项目:辽宁省自然科学基金项目(201602409);海洋公益性行业科研专项(201505019);辽宁省国家大型仪器设备共享服务能力建设补贴项目(2016)
Distribution, Sources and Ecological Risk Assessment of Polycyclic Aromatic Hydrocarbons in Surface Seawater in Liaodong Bay, China
ZHANG Yufeng1,2,3, WU Jinhao1,2, SONG Yonggang1,2, YANG Meng4, ZHAO Haibo1,2, LI Nan1,2, GUAN Daoming3,5
1.Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, China ;2.Liaoning Ocean Environment Monitoring Station, Dalian 116023, China ;3.College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China ;4.Dalian Environmental Monitoring Center, Dalian 116023, China ;5.National Marine Environmental Monitoring Center, Dalian 116023, China
Abstract:
Abstract: The distribution, sources and ecological risks from 16 polycyclic aromatic hydrocarbons (PAHs) in surface seawater in Liaodong Bay and in an offshore petroleum exploration area in the Bohai Sea, China, were investigated from May 2014 to August 2015. Statistical analysis results (e.g. cluster analysis) were used to establish the relationships between different parameters, and the risk quotient was applied to assess ecological risk. The individual PAHs with the highest concentrations were naphthalene (20.6-288.5 ng/L) and phenanthrene (19.2-59.5 ng/L). The PAHs concentrations were higher in May/June than in August, and showed a seasonal variation. The pollution caused by the 16 PAHs in the surface seawater in both Liaodong Bay and in the offshore area over the study period was classified as low to moderate. The concentrations of PAHs were generally high in the southwest of Liaodong Bay, the sea area of Jinzhou Bay, Pulandian Bay and in the Liaohe and Daliao estuaries. In Liaodong Bay, PAHs were dominated by two-and three-ring compounds. Analysis of isomer ratios indicated that the main sources of the PAHs contaminants in Liaodong Bay were petroleum sources. The PAHs posed moderate ecological risks in both Liaodong Bay and the offshore petroleum area. The contributions of individual PAHs to ecological risk varied, with high molecular weight PAHs posing greater ecological risk than low molecular weight PAHs; the contribution to ecological risk from the high molecular weight PAHs was 50%-82%. The ecological risk from benzofluoranthene was high. The investigation provided important information about the pollution levels of 16 PAHs in surface seawater in Liaodong Bay, and highlighted the need to prevent and control pollution from PAHs in the region.
Key words:  Liaodong Bay  seawater  PAHs  source  ecological risk