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Method for determining organic matter in demolition wastes

A method of determination and organic matter technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of poor practicability and single analysis object, and achieve the effect of high practicability, simple particle size requirements, and reduced operation steps

Inactive Publication Date: 2014-11-26
TONGJI UNIV
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Problems solved by technology

[0006] At present, there is no pretreatment and analysis test method for organic pollutants in demolished buildings and site soil
At the same time, the existing test methods have a relatively single analysis object. When applied to the analysis and determination of actual solid samples, step-by-step determination is often required, which increases the operation steps and has poor practicability.

Method used

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  • Method for determining organic matter in demolition wastes
  • Method for determining organic matter in demolition wastes
  • Method for determining organic matter in demolition wastes

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A synchronous pretreatment and analysis test steps for polycyclic aromatic hydrocarbons and pesticides in demolition waste:

[0030] 1. Sample pretreatment

[0031] (1) Place demolition waste and soil samples in a dark place to dry naturally. After simple crushing, sieving and screening to remove weeds and other sundries, uniform granular solid samples are obtained, which are stored in sealed bags at low temperature according to different properties and different source characteristics, pending pretreatment.

[0032] (2) Accurately weigh 2.0 g of each of the different samples, place them in 50 mL glass reagent bottles, and add 20 mL of acetone solution respectively. After marking, capped and ultrasonically extracted for 20 minutes, took it out and stirred every 5 minutes, knocked the samples accumulated at the bottom of the bottle, and made it fully contact with the acetone solution. After the sonication is completed, take it out and let it stand still. After the soli...

Embodiment 2

[0067] Simultaneous pretreatment and analysis of polycyclic aromatic hydrocarbons and pesticides in the actual solid samples of demolition waste from a pesticide factory in Tianjin and the surrounding site waste. The above method was used to process and analyze the actual solid samples of the demolition waste of a pesticide factory in Tianjin and the surrounding site waste. The results As in Table 8.

[0068] Table 8 Contents of polycyclic aromatic hydrocarbons (mg / kg) in the actual 6 solid samples of the demolition waste of a pesticide factory in Tianjin and the surrounding site waste

[0069]

[0070]

[0071] The organochlorine pesticides were not detected in the example samples. Among the organophosphorus pesticides, fenitrothion is present in one sample with a content of 246.8 mg / kg

[0072] Acetone solution and dichloromethane used in the present invention are commercially available analytically pure commodities, and n-hexane is chromatographically pure commoditie...

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Abstract

The invention relates to a method for determining organic matter in demolition wastes. The method comprises the following steps: adding an acetone solution into the demolition wastes, and carrying out synchronous pretreatment extraction through ultrasonic-centrifugal coupling to obtain extraction liquid containing organic matter; purifying the extraction liquid by a silicone solid-phase extraction column; and finally, determining the content of organic matter in the demolition wastes by a gas chromatograph-mass spectrometer (GC-MS). The organic matter in the demolition wastes include polluted construction wastes with various grain sizes in industrial enterprises and organic chlorine pesticides, organic phosphorus pesticides and polycyclic aromatic hydrocarbon in soil. The method is high in determining speed, accurate in analysis result, low in pretreatment cost and easy to combine with the GC-MS and is suitably used for synchronously extracting polycyclic aromatic hydrocarbon and pesticides from the demolition wastes of the industrial enterprises and purifying and determining organic pollutants such as pesticides and polycyclic aromatic hydrocarbon.

Description

technical field [0001] The invention relates to a method for measuring organic matter in demolition waste, in particular to a method for measuring the content of organic pollutants including pesticides and polycyclic aromatic hydrocarbons in demolished buildings and site soil of industrial enterprises. Background technique [0002] Every year in our country, a large number of chemical and pesticide enterprises face demolition or reconstruction, and the resulting industrial enterprise construction demolition waste poses a new threat to the human living environment. But so far, scientific research and policies and regulations on the disposal and recycling of industrial enterprise construction demolition waste are relatively lagging behind, and the disposal methods are often copied from ordinary demolition waste, or piled up randomly, or directly made into building materials. The reason is that there is still a lack of a set of organic pollutant detection methods suitable for i...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06
Inventor 黄晟赵由才高小峰谢田孙艳秋柴晓利牛冬杰
Owner TONGJI UNIV
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