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In-situ sampling device, detection device and detection method for maximum diffusion flux of sediment-water interface pollutants

A sampling device and diffusion flux technology, which are applied to the in-situ sampling device, detection device and detection field for the maximum diffusion flux of pollutants at the sediment-water interface, which can solve uninvolved problems, achieve low experimental intensity and strong applicability , the effect of convenient operation

Active Publication Date: 2019-05-21
中科智感(南京)环境科技有限公司
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Problems solved by technology

This method does not address the reaction mechanisms at the sediment-water interface and is only applicable to flux estimation over large water areas

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  • In-situ sampling device, detection device and detection method for maximum diffusion flux of sediment-water interface pollutants
  • In-situ sampling device, detection device and detection method for maximum diffusion flux of sediment-water interface pollutants
  • In-situ sampling device, detection device and detection method for maximum diffusion flux of sediment-water interface pollutants

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Embodiment Construction

[0030] The accompanying drawings disclose, without limitation, the structural schematic diagrams of the preferred embodiments involved in the present invention; the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] The method of the invention utilizes the fixed membrane capable of absorbing anions and cations to simultaneously obtain the maximum diffusion flux of the sediment-water interface within a certain period of time. This method is realized in the following way: using a flux measurement device composed of a fixed membrane and a shell, placing it on the sediment-water interface for a certain period of time, the analyte that diffuses from the sediment to the water will diffuse freely The diffuse sublayer across the sediment surface is then simultaneously captured by the fixed membrane. After the device is taken out, the content of the analyte is obtained by extraction, and then the maximum...

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Abstract

The invention discloses an in-situ sampling device, a detection device and a detection method for maximum diffusion flux of sediment-water interface pollutants. The sampling device comprises an annular upper shell, a fixed film and a lower shell, a groove used for containing the fixed film is formed in the top of the lower shell, the fixed film is arranged in the groove of the lower shell, a plurality of fins are arranged at the upper end edge of the annular upper shell at intervals, the annular upper shell sleeves the upper end of the lower shell and fixes the fixed film, and the average densities of the sampling device is larger than water densities. According to the invention, the maximum diffusion flux of sediments can be measured, the operation is convenient, and the experimental strength is relatively low; The applicability is high, and the types of target objects capable of being measured are wide; the size is small, and the release flux of the whole lake can be estimated through large-scale arrangement in the lake.

Description

technical field [0001] The present invention belongs to. Background technique [0002] Estimating the pollutant diffusion flux at the sediment-water interface is of great significance for understanding the material migration and transformation process at the sediment-water interface. It is one of the important parameters for evaluating the material exchange rate and the intensity of biogeochemical interactions at the interface. It is also an important basis for early warning of the risk of pollutant release. At present, the following methods are mainly used to estimate the interfacial diffusion flux: pore water concentration gradient method, laboratory culture method, in situ chamber measurement method and mass balance method. [0003] The pore water concentration gradient method is to estimate the flux by measuring the profile distribution of the concentration of dissolved pollutants in the sediment pore water and the overlying water, and establishing the relationship betw...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00G01N1/10
Inventor 丁士明王燕
Owner 中科智感(南京)环境科技有限公司
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