| 沉积物老化过程中DOC含量变化对菲吸附-解吸的影响 |
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| 引用本文： | 焦立新,孟伟,郑丙辉,张雷,秦延文.沉积物老化过程中DOC含量变化对菲吸附-解吸的影响[J].生态学报,2011,31(3):866-873. |
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| 作者姓名： | 焦立新 孟伟 郑丙辉 张雷 秦延文 |
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| 作者单位： | 1. 北京师范大学水科学研究院,北京,100875;中国环境科学研究院国家环境保护河口与海岸带环境重点实验室,北京,100012
2. 中国环境科学研究院国家环境保护河口与海岸带环境重点实验室,北京,100012 |
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| 基金项目： | 国家重点基础研究发展规划(973)资助项目(2007CB407306);中国环境科学研究院中央级公益性科研院所基本科研业务专项(2007KYYW08) |
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| 摘 要： | 采用批量实验的方法,研究了菲在渤海湾入海河流与河口沉积物上的吸附-解吸行为,并探讨了沉积物老化培养过程中溶解性有机碳(DOC)含量变化及其对菲在沉积物上吸附-解吸的影响。结果表明: ① 蓟运河沉积物(RS)中TOC、TN和DOC含量均高于北塘口沉积物(ES);RS 和ES中C/N比分别为12.30和12.00,DOC/TOC百分比分别为3.50%和2.70%。② 随着培养时间延长沉积物中DOC含量呈现降低趋势,其中RS中DOC含量比对照(CK)降低了24.21%-99.49%,而ES中DOC含量则比CK降低了18.71%-69.14%。③ 通过Freundlich模型拟合,菲在RS上吸附的N值大于ES,并且随着培养时间延长均呈现下降趋势;菲在RS和ES上吸附的KF值分别在185-792,252 530 μg1-n · kg-1 · Ln之间,老化沉积物分别比CK提高了0.50-3.28和0.42-1.00倍。④ 菲在RS和ES上的吸附-解吸均表现出明显的解吸滞后现象,并且随着溶液中菲浓度的增加,滞后系数(HI)呈现降低趋势。当Ce=1μg/L时,菲在RS和ES老化沉积物上的HI分别比CK提高了1.1-8.3和0.7-10.4倍。⑤ 沉积物中DOC含量与KF值之间呈现显著负相关关系,而与N值之间呈现显著正相关关系。因此,沉积物老化过程中DOC含量的变化很可能在菲的吸附-解吸过程中扮演着重要作用。
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| 关 键 词： | 菲 沉积物 吸附 解吸 DOC |
| 收稿时间： | 2009/12/21 0:00:00 |
| 修稿时间： | 2010/3/26 0:00:00 |
Effects of dissolve organic carbon (DOC) contents on sorption and desorption of phenanthrene on sediments during ageing |
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| JIAO Lixin,MENG Wei,ZHENG Binghui,ZHANG Lei and QIN Yanwen.Effects of dissolve organic carbon (DOC) contents on sorption and desorption of phenanthrene on sediments during ageing[J].Acta Ecologica Sinica,2011,31(3):866-873. |
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| Authors: | JIAO Lixin MENG Wei ZHENG Binghui ZHANG Lei and QIN Yanwen |
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| Institution: | College of Water Science, Beijing Normal University, Beijing 100875, China; State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012 China;College of Water Science, Beijing Normal University, Beijing 100875, China; State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012 China;College of Water Science, Beijing Normal University, Beijing 100875, China; State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012 China;State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012 China;State Environmental Protection Key Laboratory of Estuary and Coastal Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012 China |
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| Abstract: | |
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| Keywords: | phenanthrene sorption desorption sediment dissolve organic carbon |
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