锦州湾表层沉积物中多环芳烃测定与生态风险评价  

DETERMINATION AND RISK ASSESSMENT OF POLYCYCLIC AROMATIC HYDROCARBONS IN SURFACE SEDIMENT FROM JINZHOU BAY,CHINA

作　　者：徐绍箐[1] 马启敏[1] 李泽利[1] 程海鸥[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,青岛266100

出　　处：《环境化学》2011年第11期1900-1905,共6页Environmental Chemistry

基　　金：国家海洋局908专项(908-02-02-03);国家水专项课题(2009ZX07106-003)资助

摘　　要：通过测定锦州湾表层沉积物样品中16种美国EPA优控多环芳烃(PAHs)的污染水平,分析其组成、空间分布特征及来源,并进行了生态风险评价.结果表明,锦州湾表层沉积物中PAHs总量分布范围为133.44—593.91 ng.g-1,近岸地区浓度较高,外海海区浓度逐渐降低.就其组成特征而言,以4—6环PAHs为主,占总量的52.35%—64.93%,2—3环PAHs相对较少(35.07%—47.65%).通过特征参数分析发现,生物质和化石燃料的燃烧是锦州湾近岸PAHs的主要污染来源.风险评价的结果显示,严重的多环芳烃生态风险在锦州湾沉积物中不存在,但是芴化合物超过了风险评价低值,并且存在苯并[b]荧蒽和苯并[k]荧蒽、茚并[1,2,3]芘、苯并[g,h,i]苝这些没有最低安全值的PAHs化合物,可能具有不利的生态效应.Pollution levels,spatial distributions and main sources of 16 polycyclic aromatic hydrocarbons（PAHs） in surface sediments from Jinzhou Bay were analyzed.The results showed that total PAHs in the sediments ranged from 133.44 ng · g-1 to 593.91 ng · g-1.The contents of PAHs in coastal area were higher than outer sea.Concerning its characteristic,it was mainly composed of 4—6 ring PAHs,accounting for 52.35%—64.93% of ∑PAHs,PAHs with 2—3 rings were relatively low（35.07%—47.65%）.The isomeric ratios suggested that combustion of fossil fuels and biomass were the main sources of PAHs pollution.As for risk assessment results,high potential ecological risk of PAHs was not found in the sediments of Jinzhou Bay,but Fle compound was present in excess of the lower ERL.In addition,the existence of BbF,BkF,InP and BgP,which had no minimum safety value,indicated that there existed potential negative ecological impact in the area.

关 键 词：锦州湾 表层沉积物 多环芳烃 生态风险评价 

分 类 号：X834[环境科学与工程—环境工程] X820.4