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环境化学  2015 

红壤和黄泥土对不同浓度六氯苯的吸附与解吸特征

Keywords: 六氯苯,吸附,解吸,土壤

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Abstract:

采用批量平衡试验的方法,研究了不同初始浓度的六氯苯在红壤和黄泥土表面的吸附与解吸特征.结果表明,六氯苯在红壤和黄泥土表面的吸附与解吸行为均可用Freundlich方程进行很好的拟合,其相关系数(R2)在0.97—0.99之间,并表现为非线性特征.六氯苯在红壤和黄泥土上吸附的KFads值均小于其解吸的KFdes值,说明六氯苯在这两种土壤表面的解吸表现为一定的滞后效应.随着初始浓度的升高,其滞后效应增强,两者呈线性相关.用不同方程对滞后系数H,ω和λ进行量化,发现不同浓度的六氯苯在土壤表面的解吸过程表现出正滞后效应.

References

[1]  Weber W J,McGinley P M,Katz L E,Sorption Phenomena in Subsurface Systems:Concepts,Models and Effects on Contaminant Fate and Transport.Water Res.,1991,25(5):499-528
[2]  Ma L W,Southwich L M,Wills G H et al.,Hysteretic Characteristics of Atrazine Adsorption-Desorption by a Sharkey Soil.Weed Sci.,1993,1:627-633
[3]  Huang W L,Peng P A,Yu Z Q et al.,Effects of Organic Matter Heterogeneity on Sorption and Desorption of Organic Contaminants by Soils and Sediments.Appl.Geochem.,2003,18:955-972
[4]  O' Connor G A,Wierenga P J,Cheng H H et al.,Movement of 2,4,5-T through Large Soil Column.Soil.Sci.,1980,130:157-162
[5]  Koskinen W C,O' Connor G A,Cheng H H,Characterization of Hysteresis in the Desorption of 2,4,5-T from Soils.Soil Sci.Soc.Am.,1979,43:871-874
[6]  Weber Jr W L,Huang W L,Yu H,Hysteresis in the Sorption and Desorption Hydrophobic Organic Contaminants by Soils and Sediments.2 Effects of Soil Organic Matter Heterogeneity.J.Contam.Hydrol.,1998,31:149-165
[7]  Barriuso E,Laird D A,Koskinen W C et al.,Atrazine Desorption from Smectites.Soil Sci.Soc.Amer.J.,1994,58:1632-1638
[8]  Cox L,Koskinen W C,Yen P Y,Sorption-Desorption of Imidacloprid and Its Metabolites in Soil.J.Agri.Food Chem.,1997,45:1468-1472
[9]  Zhu H X,Selim H M,Hysteretic Behavior of Metolachlor Adsorption-Desorption in Soils.Soil Sci.,2000,165:632-645
[10]  梁重山,党志,刘从强等,菲在土壤/沉积物上的吸附-解吸过程及滞后现象的研究.土壤学报,2005,41(3):329-335
[11]  Huang W L,Weber Jr W J,A Distributed Reactivity Model for Sorption by Soils and Sediments.10.Relationships Between Desorption,Hysteresis,and the Chemical Characteristics of Organic Domains.Environ.Sci.Technol.,1997,31:2562-2569
[12]  Pignatello J J,Xing B S,Mechanisms of Slow of Sorption Organic Chemical to Natural Particles.Environ.Sci.Technol.,1996,30:1-11
[13]  Huang W L,Yu H,Weber Jr W L,Hysteresis in the Sorption and Desorption Hydrophobic Organic Contaminants by Soils and Sediments.1.A Comparative Analysis of Experimental Protocols.J.Contam.Hydrol.,1998,31:129-148

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