投稿中心

审稿中心

编辑中心

期刊出版

网站地图

友情链接

引用本文:秦宁,朱樱,吴文婧,王军军,王雁,何玘霜,何伟,徐福留.多环芳烃在小白洋淀挺水植物中的分布、组成及其影响因素.湖泊科学,2010,22(1):49-56. DOI:10.18307/2010.0107
QIN Ning,ZHU Ying,WU Wenjing,WANG Junjun,WANG Yan,HE Qishuang,HE Wei,XU Fuliu.The distributions,composition and their determining factors of polycyclic aromatic hydro-carbons in emergent macrophytes in Small Baiyangdian Lake. J. Lake Sci.2010,22(1):49-56. DOI:10.18307/2010.0107
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 2814次   下载 1404 本文二维码信息
码上扫一扫!
分享到: 微信 更多
多环芳烃在小白洋淀挺水植物中的分布、组成及其影响因素
秦宁, 朱樱, 吴文婧, 王军军, 王雁, 何玘霜, 何伟, 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:
利用GC-MS测定了端村小白洋淀5个采样点三种主要挺水植物(荷花、蒲草和芦苇)中16种优控多环芳烃(PAHs)的含量,分析了其分布与组成特征及其影响因素。结果表明:(1)16种优控多环芳烃总量(PAH16)在三种挺水植物中的平均干重含量范围为82.5-448.6ng/g(dw),七种挺水植物组织荷叶、荷茎、蒲叶、蒲茎、蒲根、苇叶与苇根中PAH16的平均干重含量分别为448.6ng/g(dw)、129.3ng/g(dw)、292.6ng/g(dw)、166.8ng/g(dw)、82.5ng/g(dw)、141.5ng/g(dw)和90.0ng/g(dw),这些数据表明同种植物的叶中PAHs含量最高、茎中次之、根中最低;PAHs各组份在七种挺水植物中的含量具有显著的正相关关系,反映了PAHs在植物组织中的分布模式极为相似.(2)七种挺水植物组织中,均以低环PAHs为主,中环PAHs次之,高环PAHs很低,其百分比范围分别为66.2%(荷叶)-89%(蒲茎)、10.2%(蒲茎)-32.6%(荷叶)和0.6%(蒲叶)-3.7%(苇根);菲、荧蒽、萘、芴、芘和屈6种PAHs组分在挺水植物组织中的平均百分含量较高,分别为35.3%、15.5%、12.1%、11.7%、9.2%和5.2%,占PAH16的89%.3)PAHs在挺水植物中的含量与植物含脂率具有显著的正相关关系,与PAHs组分的辛醇-水分配系数(Kow)以及辛醇-大气分配系数(Koa)具有显著的负相关关系.
关键词:  小白洋淀  挺水植物  多环芳烃  分布  组成  影响因素
DOI:10.18307/2010.0107
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)联合资助
The distributions,composition and their determining factors of polycyclic aromatic hydro-carbons in emergent macrophytes in Small Baiyangdian Lake
QIN Ning, ZHU Ying, WU Wenjing, WANG Junjun, WANG Yan, HE Qishuang, HE Wei, XU Fuliu
College of Urban Environmental Sciences,MOE Laboratory for Earth Surface Process,Peking University,Beijing 100871, P.R.China
Abstract:
The contents of 16 priority polycyclic aromatic hydrocarbons(PAHs) in the seven tissues of three species emergent mac-rophytes from five sampling sites in Small Baiyangdian Lake nearby Duancun Village were measured by GC-MS. The PAHs distri-button, composition, and their determining factors were analyzed. The following results were obtained;(1)the total dry-weightcontents of 16 priority PAHs(PAH16)ranges From 82.5 to 448.6ng/g(dw),with the average contents of 448.6ng/g(dw) in lotusleaves, 129.3 ng/g(dw) in lotus stems,292.6ng/g(dw) in cattailleaves,166.8ng/g(dw) in cattail stem, 82.5ng/g(dw) in cat-tail mots,141.Sng/g(dw) in reed leaves and 90. Ong/g(dw) in reed roots. This shows that highest contents are in leaves, followedby stems and roots. The significant positive relations among the contents of PAHsc:ongeners in seven macrophytes tissues are o6-served, implying the very similar PAHs distribution patterns among seven tissues. (2)Of 16 priority PAHs, lower molecular weightPAHs are dominant with the percentages varying from 66. 2%(in lotus leaves) to 89%(in cattail stems),while the percentagesof moderate and higher molecular weight PAHs range from 10.2%(in cattail stem,) to 32.6%(in lotus leaves) and from 0.60/(in cattail leaves) to 3.70/(in reed roots).Six PAH congeners including phenanthrenr(Phe),fluoranthene(Fla),naphtha-lene(Nap),fluorine(Flo),pyrene(Pyr) and chrysene(Chr) are dominant components with average percentages of 35.3%,15.5%,12.1%,11.70%, 9.2% and 5.2%, standing for 89% of total 16 priority PAHs(P.AH16).3)PAHs contents in emergentmacrophytes are observed to be significant positive relations with their lipid percentages, and to be significant negative relations with the octanol-water partition coefficient (Kowand octanol-air partition coefficient(Kow)of PAH congeners.
Key words:  Small Baiyangdian Lake  emergent macrophytes  PAHs  distribution  composition  determining factors
分享按钮