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Polycyclic aromatic hydrocarbon contaminated soil remediation effect evaluation method and detection kit

A polycyclic aromatic hydrocarbon and soil technology is applied in the preparation of test samples, measurement devices, and material analysis by observing the impact on chemical indicators, which can solve the problems of high cost, long time, and complicated detection methods. Achieve the effect of short time-consuming, low cost and simple operation

Pending Publication Date: 2021-03-05
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the detection method of PAH-contaminated soil in the prior art is complex in operation, time-consuming, high in cost, unable to reflect the remediation effect of PAH in time and quickly on site, and provides a A detection method and kit that is simple to operate, short in time, low in cost, and can reflect the concentration and repair effect of PAHs in a timely manner on site

Method used

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  • Polycyclic aromatic hydrocarbon contaminated soil remediation effect evaluation method and detection kit

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Effect test

Embodiment 1

[0040] This embodiment provides a method for detecting polycyclic aromatic hydrocarbon pollutants in soil, including,

[0041] S1. Take a soil sample, dry it, grind it, and pass it through a 20-mesh standard sieve to obtain a ground soil sample. Take 0.1 g of the ground soil sample in a 10 mL glass centrifuge tube, add 3 mL of n-hexane to it, and shake for 5 minutes for extraction. , then centrifuge at 2000rpm for 5min, transfer the supernatant to a clean graduated glass centrifuge tube with a straw, repeat the above steps three times, combine the supernatant, and heat the centrifuge tube containing the extract in water at 40°C Concentrate, then dilute to 0.1 mL with n-hexane to obtain the sample solution to be tested.

[0042] S2. Mix the formaldehyde solution with a mass fraction of 37% and the concentrated sulfuric acid with a mass fraction of 98.3% according to a volume ratio of 1:9 to obtain a mixed solution of formaldehyde and concentrated sulfuric acid; add the 0.1mL sa...

Embodiment 2

[0045] This embodiment provides a method for detecting polycyclic aromatic hydrocarbon pollutants in soil, including:

[0046] S1. Take a soil sample, air-dry it, grind it, and pass it through a 20-mesh standard sieve to obtain a ground soil sample. Take 0.1 g of the ground soil sample in a 10 mL glass centrifuge tube, add 3 mL of dichloromethane to it, and shake for 5 minutes for extraction. , then centrifuge at 2000rpm for 5min, transfer the supernatant to a clean graduated glass centrifuge tube with a straw, repeat the above steps three times, combine the supernatant, and heat the centrifuge tube containing the extract in water at 40°C Concentrate, and then dilute to 0.1 mL with dichloromethane to obtain a sample solution to be tested.

[0047] S2. Mix the formaldehyde solution with a mass fraction of 37% and the concentrated sulfuric acid with a mass fraction of 98.3% according to a volume ratio of 1:1000 to obtain a mixed solution of formaldehyde and concentrated sulfuric...

Embodiment 3

[0052] This embodiment provides a method for detecting polycyclic aromatic hydrocarbon pollutants in soil, including,

[0053] S1. Take the soil sample, air-dry it, grind it, pass through a 20-mesh standard sieve to obtain the ground soil sample, put 0.1 g of the ground soil sample in a 10 mL glass centrifuge tube, add 3 mL of dichloromethane and shake it for 5 min for extraction. Then centrifuge at 2000rpm for 5min, transfer the supernatant to a clean graduated glass centrifuge tube with a straw, repeat the above steps three times, combine the supernatant, put the centrifuge tube containing the extract in water at 40°C to heat and concentrate , and then dilute to 0.1 mL with dichloromethane to obtain the sample solution to be tested.

[0054] S2. Mix the formaldehyde solution with a mass fraction of 37% and the concentrated sulfuric acid with a mass fraction of 98.3% according to a volume ratio of 1:550 to obtain a mixed solution of formaldehyde and concentrated sulfuric acid...

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Abstract

The invention provides a method for detecting polycyclic aromatic hydrocarbon pollutants in soil. The method comprises the following steps of: S1, adding an extractant into a soil sample, performing concentrating, and fixing the volume to obtain a to-be-detected sample solution; and S2, adding the to-be-detected sample solution into a mixed solution of formaldehyde and concentrated sulfuric acid,observing a reaction result, and comparing the reaction result with reaction results of polycyclic aromatic hydrocarbon standard substance solutions with different concentrations and the mixed solution of formaldehyde and concentrated sulfuric acid to obtain the concentration of polycyclic aromatic hydrocarbon in the soil. the invention further provides a kit for polycyclic aromatic hydrocarbon detection. The method and the kit are adopted for polycyclic aromatic hydrocarbon concentration detection of the soil; detection can be completed through visual comparison; operation is easy; consumed time is short; cost is low; detection can be completed on a soil remediation site without sending a sample into a laboratory. The polycyclic aromatic hydrocarbon restoration effect and the polycyclic aromatic hydrocarbon pollutant removal effect of the restoration technology can be timely and rapidly reflected.

Description

technical field [0001] The invention relates to the technical field of soil organic pollutant detection, in particular to a method for evaluating the remediation effect of polycyclic aromatic hydrocarbon-contaminated soil and a detection kit. Background technique [0002] With the advancement of my country's industrialization process and the implementation of the national "retreat from two to three" urban development strategy, the problem of polluted sites has become increasingly prominent, and polluted sites and soil pollution incidents caused by petroleum, chemical, smelting, mining and other enterprises have occurred frequently. Polycyclic aromatic hydrocarbons (PAHs), as one of the common pollutants in petroleum, chemical and other organically polluted sites, have carcinogenic, teratogenic and mutagenic effects, and are easy to be adsorbed in soil particles for a long time, so they become the focus of site investigation and restoration. One of the indicators of concern. ...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/82G01N1/40G01N1/28
CPCG01N21/78G01N21/82G01N1/4055G01N1/28G01N2001/4061Y02A20/20
Inventor 郭丽莉王蓓丽宋倩韩珺李书鹏王晓伟樊强何玮淑惠霂霖沈宗泽阎思诺王祺
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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