菲在渤海湾入海河流与河口沉积物上的吸附-解吸行为  

Sorption and Desorption Behaviors of Phenanthrene on Sediments from the Rivers and Estuaries Flowing into Sea Around Bohai Bay

作　　者：焦立新[1,2] 孟伟[1,2] 郑丙辉[1,2] 赵兴茹[2] 张雷[2] 秦延文[2] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [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

出　　处：《环境科学》2010年第10期2321-2326,共6页Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2007CB407306);中央级公益性科研院所基本科研业务专项(2007KYYW08)

摘　　要：采用批量实验方法,研究了菲(Phe)在渤海湾入海河流与河口沉积物上的吸附-解吸过程,以及吸附参数与沉积物有机质性质之间的相关关系.结果表明,Phe在所有沉积物上的吸附和解吸等温线均能由线性分配模型和Freundlich模型很好地拟合.其中,线性分配系数KD值变化在58～743L·kg-1之间,与TOC、TN、DOC、Phe、C/N和DOC/TOC之间呈现显著正相关关系.Freundlich吸附能力参数KF和KFOC值分别在75～367μg1-N·kg-1·LN和2253～34743μg1-N·kg-1·LN之间,均与DOC/TOC呈现显著负相关关系,而与其它有机质参数之间相关性不显著.相比较而言,大多数沉积物的解吸等温线用Freundlich模型拟合的效果更好,并且具有明显的解吸滞后现象.有机质的含量和性质均是影响Phe在沉积物上吸附-解吸的重要因素.对于频繁受到人类活动影响的河流沉积物,溶解性有机质的影响就更为重要.Batch experiments were employed to investigate the sorption and desorption procedures of phenanthrene（Phe） on the river and estuarine sediments.The relationships between sorption parameters and organic matter properties were also discussed.The results indicated that the data on Phe sorption and desorption by different river and estuarine sediments could be fitted well by the linear partitioning and Freundlich model.The linear distribution coefficients（KD） varied from 58 to 743 L·kg^-1.The Freundlich parameters（KF and KFOC） varied from 75 μg1-N·kg^-1·LN to 367 μg1-N·kg^-1·LN and from 2 253 μg1-N·kg^-1·LN to 34 743 μg1-N·kg^-1·LN,respectively.There were significantly positive correlations between KD and TOC,TN,DOC,Phe,C /N,DOC /TOC.However,a negative correlation occurred between KF,KFOC values and DOC /TOC ratios.The data on Phe desorption could be better fitted by the Freundlich model than that by linear partitioning model.Except for S1,S8 and S9 samples,the others exhibited obvious sorption and desorption hysteresis.Contents and properties of organic matter were significant as the major factors controlling Phe sorption and desorption to and from the sediments.Considering the frequent impacts of anthropogenic sources on the river and estuarine sediments,the effects of dissolved organic matter on Phe sorption and desorption were perceived to be more important.

关 键 词：菲 吸附 解吸 沉积物 滞后系数 

分 类 号：X52[环境科学与工程—环境工程]