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A method for in-situ simultaneous monitoring of wetland soil

A soil and wetland technology, applied in measurement devices, material excitation analysis, fluorescence/phosphorescence, etc., can solve problems such as difficulty in realizing multi-parameter synchronous monitoring and field application of volume-constrained planar optode technology.

Active Publication Date: 2021-05-04
中科智感(南京)环境科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large volume restricts the field application of planar optode technology, and it is difficult to realize the simultaneous monitoring of multiple parameters.

Method used

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  • A method for in-situ simultaneous monitoring of wetland soil
  • A method for in-situ simultaneous monitoring of wetland soil
  • A method for in-situ simultaneous monitoring of wetland soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The in-situ synchronous monitoring method of wetland soil of the present invention is based on planar optode technology (PO) to realize synchronous in-situ monitoring of multiple parameters of water bodies or sediments, and the device used includes a fluorescent sensing film, an optical conduction unit, and a CMOS image sensor , two-dimensional translation guide rail, light-tight casing, power supply and data acquisition module; one or several fluorescent sensing films are installed outside the transparent window mirror of the light-tight casing, and the optical transmission unit and the CMOS image sensor form a linkage The whole is set on the two-dimensional translation guide rail. The optical conduction unit of the device, on the optical path from the fluorescent sensing film unit to the CMOS image sensor, sequentially includes a plane mirror, an LED light source, an optical lens group and a motorized rotary filter. Under the uniform illumination of the excitation lig...

Embodiment 2

[0052]The method of Example 1 was used to monitor the sediment pH and its two-dimensional distribution. The PO sensing membrane used to detect pH is based on the modified fluorescent dye of 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (HPTS-TOA) and the reference dye Fluorescent Yellow 10GN (MFY ) fluorescent sensing film, the film size is 4cm×2cm; the excitation light wavelength is 380nm to 420nm, and the optical filter is a 560nm single-wavelength optical filter.

[0053] 1) Preparation of PO sensing membrane: mix 100mg HPTS with 1g phosphorus pentachloride (PCl 5 ) contact reaction at room temperature for 1 hour to make it sulfonylated. Then react the obtained HPTS-sulfonyl chloride compound with 30 μL allylamine at 0°C to obtain a HPTS compound with cross-linked carbon-carbon double bonds, and finally react the compound with 4% polyvinyl alcohol glue, using polyethylene The adhesiveness of alcohol fixes the flat PET substrate and HPTS molecules to make a sensing...

Embodiment 3

[0071] The method of Example 1 was used to monitor the two-dimensional distribution information of pH and dissolved oxygen (DO) of the lake bottom sediment in the Meiliang Bay area of ​​Taihu Lake on site. In the described device, the PO sensing membrane used to detect pH is based on modified 8-hydroxypyrene-1,3,6-trisodium sulfonic acid (HPTS-TOA) fluorescent dye, and cooperates with reference Fluorescent yellow 10GN (MFY) fluorescent sensing membrane with a membrane size of 4cm×2cm; the PO sensing membrane used to detect DO uses dual fluorophores, namely platinum octaethylporphyrin (PtOEP) fluorescent dye and reference dye MFY, the membrane size is 4cm x 2cm.

[0072] The PO sensing film used for detecting pH and the PO sensing film used for detecting DO are attached side by side on the window lens outside the device. After the PO film was fixed for 10 minutes, the device was slowly lifted vertically into the lake until the window mirror part of the device was inserted into...

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Abstract

A method for in-situ synchronous monitoring of wetland soil. The monitoring device is inserted into the wetland soil. The device includes a light-tight casing with a transparent window mirror on one side, and a fluorescent sensing film installed on the outside of the window mirror; it also includes an optical transmission unit, CMOS image sensor, a two-dimensional translation guide rail and a data acquisition module; the optical conduction unit sequentially includes a plane mirror, an LED light source, an optical lens group and an electric rotary filter; the optical conduction unit and the CMOS are integrally arranged in a two-dimensional On the translation guide rail; turn on the LED light source, the excitation light is reflected and irradiates the fluorescence generated by the fluorescent sensing film, and then after reflection, convergence and filtering, a local fluorescent image is obtained on the CMOS; the operating device scans the fluorescent sensing film, After partial image synthesis and splicing, the overall fluorescence image is obtained; data processing is performed according to the response curve of the fluorescence sensing film to obtain the monitoring results. The method can monitor multiple parameters in the wetland soil synchronously in situ.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, in particular to a detection method for synchronously monitoring multiple important geochemical parameter information in substrates such as water body, sediment or wetland soil. Background technique [0002] With the frequent occurrence of water environment and water ecological problems (black and odorous water bodies, cyanobacteria blooms, offshore green tides and red tides, etc.), it seriously affects the human living environment and threatens human health. On-site monitoring of water bodies and sediments in wetland soil can accurately grasp basic information such as the types and concentrations of pollutants in sediments, pollution scope and degree, pollution sources and transfer routes, and provide basic data support for sediment pollution risk assessment and prediction. In-situ monitoring of sediments is an area that urgently needs to be expanded in water environment monitor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64G01N21/01
CPCG01N21/01G01N21/6402
Inventor 丁士明李金鹏金增峰李利
Owner 中科智感(南京)环境科技有限公司
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