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根际土壤中DDTs的残留与转化

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朱雪梅, 陶澍, 林健枝. 根际土壤中DDTs的残留与转化[J]. 环境化学, 2004, 23(2): 157-162.
引用本文: 朱雪梅, 陶澍, 林健枝. 根际土壤中DDTs的残留与转化[J]. 环境化学, 2004, 23(2): 157-162.
shu
ZHU Xue-mei, TAO Shu, LAM Kin-che . VARIATION OF DDTs RESIDUES IN WHEAT RHIZOSPHERE[J]. Environmental Chemistry, 2004, 23(2): 157-162.
Citation: ZHU Xue-mei, TAO Shu, LAM Kin-che . VARIATION OF DDTs RESIDUES IN WHEAT RHIZOSPHERE[J]. Environmental Chemistry, 2004, 23(2): 157-162.
shu

根际土壤中DDTs的残留与转化

  • 1.

    北京大学环境学院, 北京, 100871;

  • 2.

    香港中文大学地理与资源管理系, 香港

  • 基金项目:

    国家自然科学基金资助(40031010,40024101)

VARIATION OF DDTs RESIDUES IN WHEAT RHIZOSPHERE

  • 1.

    College of Environmental Sciences, Peking University, Beijing, 100871;

  • 2.

    Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong

  • Fund Project:

  • 摘要: 通过根垫法研究DDT的五种异构体p,p′-DDE,o,p′-DDD,p,p′-DDD,o,p′-DDT,p,p′-DDT在小麦根际土壤和非根际土壤中的残留量以及DDT,DDD和DDE之间的转化.结果发现,在40d试验期间内,DDT发生缓慢降解,根际土壤中的降解略快于非根际土壤,且差别主要表现在生成DDD的厌氧过程方面.此外,根际土壤中五种DDT的异构体的可提取残留都高于非根际土壤,说明该农药的锁定过程在根际环境相对较弱.
    Abstract: Residual and degradation of p,p ′-DDE, o,p ′-DDD, p,p ′-DDD, o,p ′-DDT, p,p ′-DDT in wheat rhizosphere were investigated using rhizobox.It was found that degradation occurred slowly during the experimental period of 40 days.The degradation rate in the rhizosphere is slightly higher than that in the bulk soil in term of anaerobic process.For all five isomers studied,the amounts of extractable residual using Soxhlet extraction in rhizosphere were higher than those in the bulk soil,indicating an inhibition on aging process in the microenvironment of the rhizosphere.
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    [2] Anderson T A,Kruger E L,Coats J R,Biological Degradation of Pesticide Wastes in the Root Zone of Soils Collected at an Agrochemical Dealership.In:Bioremediation through Rhizosphere Technology,Anderson T A,Coats J R ed.,Washington,DC:American Chemical Society,1994,199-209
    [3] 陈有鉴,根际土壤重金属形态转化研究.北京大学博士学位论文,2000,6-11
    [4] Drew M C,Root Function,Development,Growth and Mineral Nutrition.In:The Rhizosphere J M Lynch ed.,AFRC Institute of Horticultural Research,Little Hampton.1989,35-57
    [5] Kaufman D D,Degradation of Organochlorine Pesticides by Soil Microorganisms In:Guenzi W D,Dinauer R C,Davis M E et al.eds.Pesticides in Soil and Water.Soil Science Society of America,Madison,Wisconsin.1974,133-202
    [6] Harner T,Wide man J L,Jantunen L M M et al.,Residues of Organochlorine Pesticides in Alabama Soils.Environmental Pollution,1999,106:323-332
    [7] Tao S,Chen Y J,Xu F L et al,Changes of Copper Speciation in Maize Rhizosphere Soil.Environmental Pollution,2002,116:57-64
    [8] Frazar C,The Bioremediation and Phytoremediation of Pesticide-Contaminated Sites.Prepared for US EPA Office of Solid Waste and Emergency Response,Technology Innovation Office Washington DC.2000
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    [10] 何耀武,1,2,4-三氯苯在土壤-植物系统中的迁移及降解研究.中国科学院沈阳应用生态研究所博士论文,1995,28
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  • 收稿日期:  2003-01-05
朱雪梅, 陶澍, 林健枝. 根际土壤中DDTs的残留与转化[J]. 环境化学, 2004, 23(2): 157-162.
引用本文: 朱雪梅, 陶澍, 林健枝. 根际土壤中DDTs的残留与转化[J]. 环境化学, 2004, 23(2): 157-162.
shu
ZHU Xue-mei, TAO Shu, LAM Kin-che . VARIATION OF DDTs RESIDUES IN WHEAT RHIZOSPHERE[J]. Environmental Chemistry, 2004, 23(2): 157-162.
Citation: ZHU Xue-mei, TAO Shu, LAM Kin-che . VARIATION OF DDTs RESIDUES IN WHEAT RHIZOSPHERE[J]. Environmental Chemistry, 2004, 23(2): 157-162.
shu

根际土壤中DDTs的残留与转化

  • 1.  北京大学环境学院, 北京, 100871;
  • 2.  香港中文大学地理与资源管理系, 香港
  • 收稿日期:  2003-01-05
基金项目:

国家自然科学基金资助(40031010,40024101)

摘要: 通过根垫法研究DDT的五种异构体p,p′-DDE,o,p′-DDD,p,p′-DDD,o,p′-DDT,p,p′-DDT在小麦根际土壤和非根际土壤中的残留量以及DDT,DDD和DDE之间的转化.结果发现,在40d试验期间内,DDT发生缓慢降解,根际土壤中的降解略快于非根际土壤,且差别主要表现在生成DDD的厌氧过程方面.此外,根际土壤中五种DDT的异构体的可提取残留都高于非根际土壤,说明该农药的锁定过程在根际环境相对较弱.

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