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A sediment-water interface pollutant maximum diffusion flux sampling device and method

A sampling device and diffusion flux technology, applied in the field of sediment-water interface pollutant maximum diffusion flux sampling device and method, can solve unrelated problems, achieve low experimental intensity, convenient operation, and wide range of target objects Effect

Active Publication Date: 2022-02-15
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

Method used

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  • A sediment-water interface pollutant maximum diffusion flux sampling device and method
  • A sediment-water interface pollutant maximum diffusion flux sampling device and method
  • A sediment-water interface pollutant maximum diffusion flux sampling device and method

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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 the maximum diffusion flux of sediment-water interface pollutants. The sampling device includes an annular upper shell, a fixed film and a lower shell. The lower shell The top is provided with a groove for accommodating a fixed film, the fixed film is arranged in the groove of the lower shell, and the upper edge of the annular upper shell is provided with a plurality of fins at intervals, and the annular upper shell It is sleeved on the upper end of the lower casing and the fixed film is fixed, and the average density of the sampling device is greater than that of water. The invention can measure the maximum diffusion flux of the sediment, has the advantages of convenient operation, relatively small experimental intensity; strong applicability, wide range of target objects that can be measured; small volume, and can be deployed in a large range of lakes to estimate the release of the entire lake Flux and other advantages.

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...

Claims

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Application Information

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Patent Type & Authority Patents(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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