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1,2-二氯乙烷自然衰减过程中模拟饱和含水层的氧化还原条件变化

张大定 谢云峰 柳晓娟 孔祥斌 曹云者 李发生

张大定, 谢云峰, 柳晓娟, 孔祥斌, 曹云者, 李发生. 1,2-二氯乙烷自然衰减过程中模拟饱和含水层的氧化还原条件变化[J]. 环境科学研究, 2012, 25(12): 1398-1403.
引用本文: 张大定, 谢云峰, 柳晓娟, 孔祥斌, 曹云者, 李发生. 1,2-二氯乙烷自然衰减过程中模拟饱和含水层的氧化还原条件变化[J]. 环境科学研究, 2012, 25(12): 1398-1403.
ZHANG Da-ding, XIE Yun-feng, LIU Xiao-juan, KONG Xiang-bin, CAO Yun-zhe, LI Fa-sheng. Dynamics of Redox Environment during Natural Attenuation of 1,2-Dichloroethane in a Laboratory Aquifer Column[J]. Research of Environmental Sciences, 2012, 25(12): 1398-1403.
Citation: ZHANG Da-ding, XIE Yun-feng, LIU Xiao-juan, KONG Xiang-bin, CAO Yun-zhe, LI Fa-sheng. Dynamics of Redox Environment during Natural Attenuation of 1,2-Dichloroethane in a Laboratory Aquifer Column[J]. Research of Environmental Sciences, 2012, 25(12): 1398-1403.

1,2-二氯乙烷自然衰减过程中模拟饱和含水层的氧化还原条件变化

基金项目: 国家环境保护公益性行业科研专项(201109017)

Dynamics of Redox Environment during Natural Attenuation of 1,2-Dichloroethane in a Laboratory Aquifer Column

  • 摘要: 为研究自然条件下饱和含水层中1,2-DCA(1,2-二氯乙烷)的自然衰减过程及该过程中含水层氧化还原环境的变化特征,利用室内连续水流土柱模拟饱和含水层,研究生物降解作用对1,2-DCA自然衰减的贡献以及饱和含水层环境条件的动态变化规律. 初始ρ(1,2-DCA)为50 mg/L,模拟地下水流速为450 μL/min,模拟试验连续进行30 d,分别监测ρ(1,2-DCA)和水环境指标. 结果表明,1,2-DCA自然衰减的一级速率常数为0.068 9 d-1,其中生物降解作用的贡献率为6.34%. 1,2-DCA自然衰减过程中,NO3-首先充当生物降解的电子受体,随后Fe3+、SO42-依次发生反应,土柱内部不同高度出现了氧化还原分带,分别是硫酸盐还原带、铁盐还原带、硝酸盐还原带.

     

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出版历程
  • 收稿日期:  2012-05-24
  • 修回日期:  2012-10-10
  • 刊出日期:  2012-12-25

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