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In-situ synchronous monitoring method of wet land soil

A soil and wetland technology, applied in measurement devices, instruments, fluorescence/phosphorescence, etc., can solve the problems of volume-constrained planar optode technology on-site application, difficult to achieve multi-parameter synchronous monitoring, etc., to achieve short response time, convenient monitoring, space high resolution effect

Active Publication Date: 2018-07-31
南京智感环境科技有限公司 +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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  • In-situ synchronous monitoring method of wet land soil
  • In-situ synchronous monitoring method of wet land soil
  • In-situ synchronous monitoring method of wet land 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

In an in-situ synchronous monitoring method of wet land soil, a monitoring device is inserted in the wet land soil. The monitoring device comprises a light-proof shell with transparent window glass inone side, and further comprises an optical conduction unit, a CMOS image sensor, a two-dimensional horizontal movement guide rail and a data collecting module, wherein a fluorescent sensing film is installed on the outer side of the window glass. The optical conduction unit sequentially comprises a plane mirror, an LED light source, an optical lens group and an electric rotating optical filter. The optical conduction unit and the CMOS image sensor are arranged on the two-dimensional horizontal movement guide rail as a whole. The LED light source is turned on, and after fluorescent light generated when exited light is reflected and then illuminate the fluorescent sensing film is reflected, converged and filtered, local fluorescent images are obtained on the CMOS image sensor; an operationdevice scans the fluorescent sensing film, and an overall fluorescent image is obtained after the local images are synthesized and spliced; data processing is conducted according to a response curve of the fluorescent sensing film to obtain a monitoring result. By means of the method, various parameters of the wet land soil can be synchronously monitored 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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IPC IPC(8): G01N21/64G01N21/01
CPCG01N21/01G01N21/6402
Inventor 丁士明李金鹏金增峰李利
Owner 南京智感环境科技有限公司
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