基于平面光极技术研究颤蚓生物扰动对水中Cd2+向沉积物迁移的影响
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地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院,地下水资源与环境教育部重点实验室/水资源与水环境吉林省重点实验室/吉林大学环境与资源学院

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x131

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Effects of Tubificid Bioturbation on Migration of Cd2+from Water to Sediment Using Planar Optode
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Key Lab of Groundwater Resources and Environment of Ministry of Education/ Key Lab of Water Resources and Aquatic Environment of Jilin Province/ College of Environment and Resources,Jilin University,Key Lab of Groundwater Resources and Environment of Ministry of Education/ Key Lab of Water Resources and Aquatic Environment of Jilin Province/ College of Environment and Resources,Jilin University,,Key Lab of Groundwater Resources and Environment of Ministry of Education/ Key Lab of Water Resources and Aquatic Environment of Jilin Province/ College of Environment and Resources,Jilin University,Key Lab of Groundwater Resources and Environment of Ministry of Education/ Key Lab of Water Resources and Aquatic Environment of Jilin Province/ College of Environment and Resources,Jilin University,Key Lab of Groundwater Resources and Environment of Ministry of Education/ Key Lab of Water Resources and Aquatic Environment of Jilin Province/ College of Environment and Resources,Jilin University

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    摘要:

    本研究制备了一种能够选择性识别Cd2+的平面传感膜。该膜具有响应速度快(<20 s)、准确性高及稳定性好等特点。把利用该传感膜制备的Cd2+平面光极系统应用于生物扰动存在的水/沉积物体系中,根据体系垂直剖面Cd2+的分布及迁移情况,研究颤蚓生物扰动对上覆水中Cd2+向沉积物迁移的影响。研究发现:制备的Cd2+平面光极系统可以反映出上覆水中Cd2+向沉积物迁移的过程。无生物扰动时,沉积物仅表层及水/沉积物界面下2 cm深度范围内第1至3天的Cd2+浓度略有升高,随后趋于稳定;深度超过2 cm的沉积物Cd2+浓度几乎不变(同背景浓度)。有生物扰动时,深度约5 cm范围内的沉积物中Cd2+浓度显著增加,深度越浅的沉积物中的Cd2+浓度增加越快,深度超过5 cm的沉积物中Cd2+浓度基本不变。与无生物相比,颤蚓扰动可以显著促进Cd2+由上覆水中向沉积物的迁移。

    Abstract:

    A Cd2+ plane sensing membrane has been developed in this study, and the membrane has advantages including a short response time (<20 s), precise and good stability. With the help of camera, the sensor can directly show the variability in the distribution and migration of Cd2+ vertical profile in Water/Sediment System. The research indicates that the planar Optode applied to a simulated water/sediment microcosm can reflect the migration of Cd2+ from Water to Sediment. In addition, in the absence of bioturbation, the concentration of Cd2+distributed in the interface and the district within the depth of 2 cm from the interface of water/sediment was slightly increased in the first three days, and then tended to be stable. The concentration of Cd2+distributed in the district deeper than 2 cm from the interface of water/sediment remained constantly. Under the bioturbation, the concentration of Cd2+ distributed in the district deeper than 5 cm from the interface of water/sediment was increased dramatically. The amount of the Cd2+increased was inversely proportional with the depth, the concentration of Cd2+ distributed in the district deeper than 5 cm from the interface of water/sediment was remained constantly. Compared with the absence of bioturbation, tubificid biological disturbance can significantly promote the migration of Cd2+from water to sediment.

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毛丹,政芳,赵天宇,等. 基于平面光极技术研究颤蚓生物扰动对水中Cd2+向沉积物迁移的影响[J]. 科学技术与工程, 2016, 16(21): .
MAO Dan, ZHENG Fang, ZHAO Tian-yu, et al. Effects of Tubificid Bioturbation on Migration of Cd2+from Water to Sediment Using Planar Optode[J]. Science Technology and Engineering,2016,16(21).

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  • 收稿日期:2016-03-17
  • 最后修改日期:2016-04-19
  • 录用日期:2016-04-27
  • 在线发布日期: 2016-08-09
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