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Non-aqueous-phase liquid soil pollutant concentration preparation device and non-aqueous-phase liquid soil pollutant concentration preparation method

A technology of pollutant concentration and non-aqueous liquid, which is applied in the field of non-aqueous liquid soil pollutant concentration preparation device, can solve the problems of heavy workload, uneven sample concentration distribution, and high precision of soil sample concentration, and achieve sample homogeneity sex high effect

Active Publication Date: 2015-01-21
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because it is immiscible with water, according to the traditional mass proportioning method to prepare samples one by one, there will be a large error, the sample concentration distribution is uneven, and the procedure is cumbersome and the workload is heavy. Therefore, the present invention introduces a non-aqueous liquid soil Pollutant concentration dilution method, this method is more efficient in preparing samples, and the prepared soil samples have higher concentration accuracy and less error

Method used

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  • Non-aqueous-phase liquid soil pollutant concentration preparation device and non-aqueous-phase liquid soil pollutant concentration preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Reference figure 1 , The non-aqueous liquid soil pollutant concentration preparation device includes a base 1 provided with a supporting shaft 2 on one side, and a sample collection container assembly is provided near the base of the supporting shaft 2, wherein: the side near the top of the supporting shaft 2 is connected with a press The main funnel 5 for quantitative addition of liquid reagents; the other side of the base 1 is provided with a support 4; the support 4 is provided with a motor 41 with a cantilever 42; the suspension 42a at the free end of the cantilever 42 is suspended to allow quantitative addition of liquid reagents on demand The secondary funnel 6; the secondary funnel 6 can move above or below the main funnel 5 under the swing of the cantilever 42; the main discharge valve 52 is provided at the bottom opening of the main funnel 5; the secondary discharge valve is provided at the bottom opening of the secondary funnel 6 Valve 62; the main fu...

Embodiment 2

[0058] Example 2: The experiment requires the preparation of engine oil contaminated silt, with a fixed water content of 10%, and an oil content of 17%, 15%, 13%, 11%, 9%, 7%, 5%, 3%, a total of 8 For soil samples, the required soil sample mass for each concentration is M=20g, and the minimum oil content is 3%, which is greater than the concentration difference of 2%.

[0059] According to the experimental requirements and the above methods, weigh the mass of dry soil as 1.5×20×8=240g, weigh 24g of water, and mix 264g of water and dry soil evenly and use it as subsoil for later use. Divide 264g of subsoil into 2 parts, one of which has a mass of 5M=100g as a soil sample with a concentration of 20% oil content, and another 164g as a subsoil for dilution. According to formula 2, the mass of dry soil contained in 100g of subsoil with a water content of 10% is 90.91g. According to the definition of oil content, the weight of the oil should be weighed to 15.45g for the first sample. P...

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Abstract

The invention discloses a non-aqueous-phase liquid soil pollutant concentration preparation device and a non-aqueous-phase liquid soil pollutant concentration preparation method. The non-aqueous-phase liquid soil pollutant concentration preparation device comprises a base provided with a supporting rotating shaft on one side; and a sample collection container assembly is arranged nearby the base part of the supporting rotating shaft and adopts a circulating preparation manner. A cantilever is driven by a motor to pass through and reach the upper side or the lower side of a main funnel; according to the requirements of the method disclosed by the invention, accurate feeding or discharging of a sample is carried out by opening and closing a main discharging valve and a secondary discharging valve; and the sample is alternatively added between the main funnel and a secondary funnel according to the requirements so that mixed sample preparation can be more rapid and accurate than that of the prior art. The non-aqueous-phase liquid soil pollutant concentration preparation device and the non-aqueous-phase liquid soil pollutant concentration preparation method have the advantages of simplicity and convenience, rapidness and high sample homogeneity.

Description

Technical field [0001] The invention relates to a preparation method and device suitable for indoor petroleum contaminated soil samples in the technical field of environmental monitoring, in particular to a non-aqueous liquid soil pollutant concentration preparation device and method. Background technique [0002] The vast majority of organic pollutants have very low solubility in water. They are immiscible with water and air underground and exist in the form of a liquid phase. In the research, these pollutants are generally referred to as non-aqueous liquids, namely NAPLs (non- Aqueous phase liquids), among which DNAPLs (dense non-aqueous phase liquids) are denser than water, LNAPLs (light non-aqueous phase liquids) are less dense than water, and the non-aqueous phase is also called oil phase. Highly toxic organic chlorine solvents (such as trichloroethylene TCE, tetrachloroethylene PCE, chloroform TCA), coal tar, carbon tetrachloride, chloroform, dichloromethane, etc. are commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/38
Inventor 潘玉英
Owner ZHEJIANG OCEAN UNIV