首页 | 本学科首页   官方微博 | 高级检索  
     检索      

菲在土壤/沉积物上的吸附-解吸过程及滞后现象的研究
引用本文:梁重山,党志,刘丛强,黄伟林.菲在土壤/沉积物上的吸附-解吸过程及滞后现象的研究[J].土壤学报,2004,41(3):329-335.
作者姓名:梁重山  党志  刘丛强  黄伟林
作者单位:1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵阳,550002
2. 华南理工大学应用化学系,广州,510641
3. Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, PA 19104, USA
基金项目:国家自然科学基金项目 ( 2 0 0 770 0 8)及中国科学院重要方向项目 (KZCX3—SW— 14 0 ,KZCX2— 10 5 )资助
摘    要:实验研究了菲在土壤 /沉积物上的吸附 解吸过程。CHL土壤和HFH沉积物中有机质的固相13 CCPMASNMR谱图很相似 ,表明样品中有机质的组成差异不大 ;菲在土壤 /沉积物上的吸附过程表现出明显的非线性 ;线性模型不适合拟合菲的吸附等温线 ,Freundlich模型和双区位反应模型 (DRDM)较好地拟合了菲的吸附等温线 ,其中DRDM模型还清楚地反映菲在低浓度和高浓度下不同的吸附方式 ;另外 ,研究表明菲在土壤 /沉积物上的解吸过程中存在明显的滞后现象 ,这可能和土壤 /沉积物有机质的异质性和土壤胶团微小孔隙的存在有关。

关 键 词:  线性模型  Freundlich模型  双区位反应模型(DRDM)  滞后现象
收稿时间:6/2/2003 12:00:00 AM
修稿时间:2003/10/31 0:00:00

STUDIES ON SORPTION-DESORPTION EQUILIBRIA AND HYSTERESIS OF PHENANTHRENE BY SOIL AND SEDIMENT
Liang Chongshan,Dang Zhi,Liu Congqiang and Huang Weilin.STUDIES ON SORPTION-DESORPTION EQUILIBRIA AND HYSTERESIS OF PHENANTHRENE BY SOIL AND SEDIMENT[J].Acta Pedologica Sinica,2004,41(3):329-335.
Authors:Liang Chongshan  Dang Zhi  Liu Congqiang and Huang Weilin
Institution:Liang Chongshan 1 Dang Zhi 2 Liu Congqiang 1 Huang Weilin 3
Abstract:This paper describes an experimental pursuit of a mechanistic model for interpreting and quantitatively describing nonlinear, slow, and hysteretic sorption phenomena associated with heterogeneous soils and sediment in subsurface systems. The soil/sediment organic matter was characterized using carbons types derived from 13 C CPMAS NMR spectroscopy. All sets of equilibrium sorption data were fitted using three different sorption model: the linear model, the Freundlich model or its linearized form, and the dual reactive domain model (DRDM). The linear model was not appropriate for describing any of the experimental sorption data, while the Freundlich model and the dual reactive domain model was found to be adequate for all samples. From DRDM it was observed that sorption mechanism changes with soil organic matter and with increasing contaminant concentration. The apparent sorption-desorption hystersis was quantified for each sample. Sorption-desorption hystersis each varie from sample to sample, and they also appear to correlate with the chemical characteristics of soil organic matter. On the other hand, the pore structure of soils may be a critical factor in sorption-desorption hystersis of hydrophobic organic contaminants.
Keywords:Phenanthrene  Linear model  Freundlich model  Dual reactive domain model  Hystersis  
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《土壤学报》浏览原始摘要信息
点击此处可从《土壤学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号