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Method for detecting potassium isotope in water

A potassium isotope and detection method technology, applied in the field of environmental science, can solve problems such as the cause and source of difficult water bodies

Inactive Publication Date: 2021-09-07
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for water bodies in complex areas, such as river water flowing through carbonate rocks or silicate rocks, it is difficult to accurately determine the cause and source of water bodies only based on the indicators of hydrogen and oxygen isotopes

Method used

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  • Method for detecting potassium isotope in water

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Experimental program
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Effect test

Embodiment 1

[0055] A method for detecting potassium isotopes in water, comprising the steps of:

[0056] (1) Take about 2L of river water from the surface 50-100cm of the Lancang River, filter the water sample with a 0.45μm cellulose filter membrane on site, add hydrochloric acid, and bring it back to the laboratory in a dark box.

[0057] (2) Perform column chromatography on the sample solution in step (1) using a cation-exchange resin, the cation-exchange resin is AG50W-X12 resin, and the resin needs to be pretreated before being used, and then loaded for column chromatography. The pretreatment method includes: first soaking in ultrapure water for 30 hours, and then washing the packed resin with a mixed solution of ultrapure water and hydrochloric acid with a pH of 8.0.

[0058] First use 10mL of hydrochloric acid with an equivalent concentration of 6N to elute the impurity components, then use 15mL of ultrapure water to elute the impurity components (repeat twice), then use 10mL of the...

Embodiment 2

[0065] According to the method of embodiment one, collect respectively Lancang River, Thai Meng River water and groundwater sample, detect the composition and the content of the potassium isotope in the water body; Summarize the characteristics of mass fractionation and non-mass fractionation information of potassium isotopes from different sources, establish identification index charts, determine the source and cause of natural water bodies, and guide environmental protection and governance. δ 41 K(‰)-Water source type identification index chart, flowing through carbonate formation: -0.54‰~-0.28‰; flowing through silicate formation: -0.62‰~+0.04‰; flowing through evaporite formation: -0.22‰~+0.25‰; Affected by chemical fertilizer pollution: -0.24‰~+0.03‰; Affected by industrial activities: -0.32‰~-0.11‰;

[0066] Lancang River water dissolved state: -0.35‰~+0.05‰, suspended matter: -0.61‰~-0.39‰; Thai Meng River water dissolved state: -0.62‰~+0.25‰, suspended matter: -0.60‰t...

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Abstract

The invention relates to the field of environmental science, in particular to a method for detecting potassium isotope in water. The method comprises the following steps: S1, mixing to-be-detected water and hydrochloric acid to obtain a sample solution; S2, performing column chromatography separation on the potassium isotope in the sample solution to obtain a potassium isotope solution; S3, drying the potassium isotope solution by distillation to obtain a potassium isotope solid sample; S4, dissolving the potassium isotope solid sample into a nitric acid solution to obtain a potassium isotope redissolution solution; and S5, carrying out potassium isotope composition and content detection on the potassium isotope reconstitution fluid. According to the method, the potassium isotope in the natural water body is detected, the blank of potassium isotope testing at present is filled, and more accurate data is provided for research on the source and cause of the natural water body so as to accurately determine the cause and source of the water body.

Description

technical field [0001] The invention relates to the field of environmental science, in particular to a method for detecting potassium isotopes in water. Background technique [0002] With the refinement and deepening of ecological and environmental protection work, it is necessary to analyze the source and cause of water bodies in some complex areas. At present, the identification of the source of water extraction mainly relies on indicators such as stable isotopes of hydrogen and oxygen. However, for water bodies in complex areas, such as river water flowing through carbonate rocks or silicate rocks, it is difficult to accurately determine the origin and source of water bodies only based on the indicators of hydrogen and oxygen isotopes. Therefore, it is necessary to develop a new identification index system to trace the source and cause of water bodies. [0003] Potassium (K) is a constant element in natural water bodies. The potassium content in river water is affected ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/626G01N1/40
CPCG01N27/626G01N1/405
Inventor 韩贵琳张倩
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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