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引用本文:朱樱,吴文婧,王军军,秦宁,王印,王雁,何玘霜,徐福留.小白洋淀水-沉积物系统多环芳烃的分布、来源与生态风险.湖泊科学,2009,21(5):637-646. DOI:10.18307/2009.0505
ZHU Ying,WU Wenjing,WANG Junjun,QIN Ning,WANG Yin,WANG Yan,HE Qishuang,XU Fuliu.Distribution, sources and ecological risks of polycyclic aromatic hydrocarbons in water-sediment system in Lake Small Baiyangdian. J. Lake Sci.2009,21(5):637-646. DOI:10.18307/2009.0505
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小白洋淀水-沉积物系统多环芳烃的分布、来源与生态风险
朱樱, 吴文婧, 王军军, 秦宁, 王印, 王雁, 何玘霜, 徐福留
北京大学城市与环境学院, 地表过程分析与模拟教育部重点实验室, 北京 100871
摘要:
以端村小白洋淀为研究对象,利用GC-MS测定了6个样点水、悬浮物和沉积物中15种优控多环芳烃(PAHs)的含量,分析了其组成与来源特征,探讨了不同多环芳烃单体的生态风险.结果表明:(1)15种优控多环芳烃的总含量(PAH15),水相为40.1-74.0ng/L,算术均值51.0ng/L;悬浮物为2438.0-5927.0ng/g,算术均值4528ng/g;沉积物为466.9-1366.4ng/g,算术均值为755.6ng/g;与国内外有关研究相比,污染较轻.(2)三相中均以2、3环PAHs为主,其比例均高于80%;并且,从水相、悬浮物相到沉积物相,2环PAHs依次降低,3环、4环依次升高,高环检出率和含量也依次升高.(3)沉积物中多环芳烃的来源以生物质燃料(秸秆、薪材)和煤的燃烧为主,以液体化石燃料(汽油、柴油和原油)的燃烧为辅.(4)沉积物中的芴(FLO)、菲(PHE)含量在潜在生态风险效应区间低值(ERL)与中值(ERM)之间,其生态风险几率介于10%-50%之间;其他PAHs单体的含量均低于ERL,其生态风险几率均低于10%.
关键词:  小白洋淀  多环芳烃  分布  组成  来源  生态风险
DOI:10.18307/2009.0505
分类号:
基金项目:国家杰出青年基金项目(40725004);国家自然科学基金项目(40671165);国家重点基础研究发展计划(973)项目(2007CB407304,2006CB403304)
Distribution, sources and ecological risks of polycyclic aromatic hydrocarbons in water-sediment system in Lake Small Baiyangdian
ZHU Ying, WU Wenjing, WANG Junjun, QIN Ning, WANG Yin, WANG Yan, HE Qishuang, XU Fuliu
College of Urban & Environmental Sciences, MOE Laboratory for Earth Surface Process, Peking University, Beijing 100871, P.R.China
Abstract:
The contents of 15 priority polycyclic aromatic hydrocarbons (PAHs) in water, suspended particulate matter (SPM) andsediment from six sampling sites in Lake Small Baiyangdian nearby Duancun Village were measured by GC-MS. The PAHsdistribution, composition, source and ecological risk were analyzed. The following results were obtained: (1) the total contents of 15priority PAHs (PAH15) varied from 40.1 to 74.0ng/L with the average of 51.0ng/L in water, from 2438.0 to 5927.0ng/g with theaverage of 4528ng/g in SPM, and from 466.9 to 1366.4ng/g with the average of 755.6ng/g in sediments. Compared with other areasin or out of China, the PAHs contamination was not serious. (2) The percentages of 2- and 3-rings PAHs accounted for more than80% of PAH15 in water, SPM and sediment, respectively. From water, SPM, to sediments, the percentages of 2-rings PAHs weredeclined sequentially; while these of 3- and 4-rings as well as 5- and 6-rings PAHs were increased gradually. (3) The major sources ofPAHs in sediments were the combustions of biomass fuels (straw, firewood) and coal; while the combustions of liquid fossil fuelsincluding gasoline, diesel and crude oil was the secondary sources. (4) Owing to the contents of Fluorene (FLO) and Phenanthrene(PHE) varying between the ERL(effects range low) and ERM (effects range median), their probabilities of ecological risks wasestimated between 10%-50%. The probabilities of ecological risks for the rest species of 15 priority PAHs were below 10%, sincetheir contents were lower than the ERL.
Key words:  Lake Small Baiyangdian  PAHs  distribution  composition  source  ecological risk
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