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Quickly judging method for underground water polluted by organic matter

A groundwater and organic matter technology, used in material excitation analysis, fluorescence/phosphorescence, etc., can solve problems such as high technical requirements and complex processing, and achieve the effects of high detection sensitivity, less data processing, and less sample demand.

Inactive Publication Date: 2013-01-23
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The commonly used detection method for organic matter is GC-MS technology. However, using GC-MS to analyze the composition of organic matter requires complex pretreatment and high technical requirements.

Method used

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  • Quickly judging method for underground water polluted by organic matter
  • Quickly judging method for underground water polluted by organic matter
  • Quickly judging method for underground water polluted by organic matter

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Sampling: The samples were taken from a landfill in Beijing and its nearby groundwater. The landfill is an informal landfill without any anti-seepage treatment, and the groundwater of the landfill has long been polluted by leachate. A total of 16 groundwater samples were collected in the landfill, the upstream and both sides of the landfill, and the downstream of the landfill. Store at low temperature in an incubator, and then transport it back to the laboratory on the same day, and store it in a freezer at 4°C.

[0036] Filtration and determination of DOC: After the groundwater sample is filtered with a 0.45 μm filter membrane, the DOC of the sample is measured on a TOC analyzer. When the DOC concentration of the sample is higher than 10mg / L, dilute with double distilled water so that 0<DOC<10mg / L.

[0037] Three-dimensional fluorescence spectrum measurement: three-dimensional fluorescence spectrum measurement is performed on all samples, the excitation wavelength is...

Embodiment 2

[0041] Sampling: Groundwater samples were collected in and around a farmland in Changzhou, Jiangsu. The farmland is 4.2km wide from east to west and 6.5km long from north to south. Wheat is planted in winter and rice is planted in summer and autumn. A total of 16 groundwater samples were collected in the farmland, upstream, both sides and downstream of the farmland. Store in an incubator at low temperature, and transport it back to the laboratory within 12 hours, and store it in a freezer at 4°C.

[0042] Filtration and determination of DOC: After filtering the sample with a 0.45μm fiber filter membrane, measure the DOC of the sample on the TOC analyzer. When the DOC of the sample is higher than 10mg / L, use double distilled water to adjust the sample to 0<DOC<10mg / L .

[0043] Three-dimensional fluorescence spectrum measurement: All samples are subjected to three-dimensional fluorescence spectrum measurement, the excitation wavelength is set to 200-440nm, the emission waveleng...

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Abstract

The invention relates to a quickly judging method for underground water polluted by organic matter, which comprises the following steps: A) collecting underground water samples in, pollution source areas, the upstream, two sides and the downstream of the pollution source areas; B) filtering collected underground samples, and determining soluble organic carbon concentration; C) converging the three-dimensional fluorescence spectrum matrix data of all underground water samples so as to process parallel factor analysis; and D) judging that the underground water is not polluted if component acquired in the parallel factor analysis does not have fluorescence peaks within a range that an excitation wavelength is larger than or equal to 200nm and is less than or equal to 440nm; and an emission wavelength is larger than or equal to 280nm and is less than 380nm; judging that the underground water is polluted if the component acquired in the parallel factor analysis appears the fluorescence peaks within a range that the excitation wavelength is larger than or equal to 200nm and is less than or equal to 440nm; and the emission wavelength is larger than or equal to 280nm and is less than 380nm, wherein the larger the maximum fluorescence strength of the underground fluorescence component is, the severer the pollution degree of the underground is. According to the invention, the quickly judging method is characterized by little sample quantity, quick analysis and high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of groundwater pollution and prevention, and in particular relates to a method for judging whether groundwater is polluted or not and the degree of pollution through the presence or absence and relative concentration of organic matter from human activity sources in groundwater. Background technique [0002] Irregular landfilling of domestic waste, random discharge of wastewater from livestock and poultry breeding, and extensive use of pesticides in farmland have caused groundwater in some areas to be polluted by organic matter, bringing hidden dangers to the safety of drinking water for local people. In order to eliminate this hidden danger and ensure the safety of drinking water for the masses, it is necessary to first determine whether the groundwater is polluted and the degree of pollution, and then evaluate whether the groundwater is drinkable and needs to be treated. [0003] Commonly used indicators to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 何小松席北斗姜永海许其功潘红卫安达杨昱
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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