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引用本文:林莉,董磊,李青云,黄茁,郦超,黎睿,杨文俊.三峡库区水体和底泥中多环芳烃和邻苯二甲酸酯类分布和来源.湖泊科学,2018,30(3):660-667. DOI:10.18307/2018.0308
LIN Li,DONG Lei,LI Qingyun,HUANG Zhuo,LI Chao,LI Rui,YANG Wenjun.Distribution and sources of polycyclic aromatic hydrocarbons and phthalic acid esters in water and surface sediment from the Three Gorges Reservoir. J. Lake Sci.2018,30(3):660-667. DOI:10.18307/2018.0308
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三峡库区水体和底泥中多环芳烃和邻苯二甲酸酯类分布和来源
林莉1,2, 董磊1,2, 李青云1,2, 黄茁1,2, 郦超1,2, 黎睿1,2, 杨文俊3
1.长江科学院流域水环境研究所, 武汉 430010;2.长江科学院流域水资源与生态环境科学湖北省重点实验室, 武汉 430010;3.长江科学院院长办公室, 武汉 430010
摘要:
通过对2016年三峡库区干支流18个采样点水体和底泥中16种多环芳烃(PAHs)和6种邻苯二甲酸酯类(PAEs)污染物浓度的时空分布特征和来源进行分析,得出如下结论:三峡库区2016年水体和底泥中ΣPAHs分别为3.9~107.6 ng/L(均值为39.9 ng/L)和267.9~1018.1 ng/g(均值为490.9 ng/g),ΣPAEs分别为122.4~2884.7 ng/L(均值为848.1 ng/L)和192.9~3473.4 ng/g(均值为1253.35 ng/g).水库水体和底泥中PAHs和PAEs均表现出显著的时空分布特征.干支流水体ΣPAHs平均浓度均为放水期(6月)高于蓄水期(12月),干流底泥ΣPAHs平均含量在蓄水期高于放水期.干流水体中ΣPAEs平均浓度在蓄水期显著高于放水期,底泥中ΣPAEs平均含量为放水期高于蓄水期.库区水体中的PAHs以2~3环和4环为主,底泥中以4环和5~6环为主.水体和底泥中PAEs均以邻苯二甲酸(2-乙基已基)酯和邻苯二甲酸二正丁酯为主.库区水体中PAHs的主要来源为焦化或煤焦油挥发、石油源及燃料的中低温燃烧;底泥中PAHs主要来源为煤和生物质燃烧以及石油.水体和底泥中的PAEs主要来源于塑料和重化工工业以及生活垃圾.
关键词:  三峡水库  多环芳烃(PAHs)  邻苯二甲酸酯类(PAEs)  分布  污染来源
DOI:10.18307/2018.0308
分类号:
基金项目:水利部公益性行业专项经费项目(201501042)、中国科协青年人才托举工程项目(2015QNRC001)和中央级公益性科研院所基本科研业务费项目(CKSF2017062/SH,CKSF2015014/SH)联合资助.
Distribution and sources of polycyclic aromatic hydrocarbons and phthalic acid esters in water and surface sediment from the Three Gorges Reservoir
LIN Li1,2, DONG Lei1,2, LI Qingyun1,2, HUANG Zhuo1,2, LI Chao1,2, LI Rui1,2, YANG Wenjun3
1.Basin Water Environmental Research Department, Changjiang River Scientific Research Institute, Wuhan 430010, P. R. China;2.Hubei Provincial Key Lab of Basin Water Resource and Eco-Environmental Science, Changjiang River Scientific Research Institute, Wuhan 430010, P. R. China;3.Administration Office, Changjiang River Scientific Research Institute, Wuhan 430010, P. R. China
Abstract:
Distribution and potential sources of 16 polycyclic aromatic hydrocarbons (PAHs) and 6 phthalic acid esters (PAEs) at 18 sampling sites during water drawdown and impoundment period were investigated in surface water and sediment from the Three Gorges Reservoir (TGR) in 2016. In surface water, the ΣPAHs concentrations in the TGR were 3.9-107.6 ng/L (mean value was 39.9 ng/L) and 267.9-1018.1 ng/g (mean value was 490.9 ng/g) in water and sediment, respectively. The ΣPAEs concentrations were 122.4-2884.7 ng/L (mean value was 848.1 ng/L) and 192.9-3473.4 ng/g (mean value was 1253.35 ng/g) in water and sediment, respectively. PAHs and PAEs show significant spatial variations in the TGR. The mean ΣPAHs concentration in water during water drawdown period (June) was higher than that during water impoundment period (December) both in mainstream and tributaries, and the mean ΣPAHs concentration in sediment during water impoundment period was higher than that during water drawdown period in mainstream. The mean ΣPAEs concentration in sediment during water impoundment period was higher than that during water drawdown period in mainstream. Whereas, the mean ΣPAHs concentration in sediment during water drawdown period was higher than that during water impoundment period in mainstream. PAH monomers with (2+3)-ring and 4-ring were dominant in water, and with 4-ring and (5+6)-ring were dominant in sediment. Di-n-butyl phthalate and di-2-ethylhexyl phthalate were the dominant PAE pollutants in the TGR. The main source of PAHs in water is a mixture of creosote or coal tar volatilizations, petroleum sources and low temperature combustions of fuels. Whereas, the main source of PAHs in sediments is a mixture of coal and biomass combustions and petroleum sources, and petroleum combustions. The main sources of PAEs in the TGR was plastics and heavy chemical industries, and domestic wastes.
Key words:  Three Georges Reservoir  polycyclic aromatic hydrocarbons (PAHs)  phthalic acid esters (PAEs)  distribution  source of pollution
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