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Eluent for benzo[a]pyrene in soil and elution method thereof

An elution method and eluent technology are applied in the field of soil organic pollution treatment to achieve the effects of improving hard water resistance, improving solubilization effect and convenient operation.

Inactive Publication Date: 2015-04-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is aimed at the domestic demand for benzo[a]pyrene contaminated soil remediation technology, to provide a kind of anionic surfactant, nonionic surfactant and inorganic salts, which can efficiently and quickly remediate benzo[a]pyrene [a] Eluent for pyrene-contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 The elution effect of low concentration benzo[a]pyrene contaminated soil

[0023] The composition of the soil eluent is: 3.0g / L Tween80, 1.0g / L SDS, 1.0g / L K 2 SiO 3 , the solvent is water.

[0024] Preparation of contaminated soil: Dissolve a certain amount of benzo[a]pyrene in dichloromethane solvent to fully dissolve it, and spray it evenly into the sterilized soil, place it at room temperature to volatilize the organic solvent in the soil, add sterile Water was used to make the soil moisture content reach 30%, and benzo[a]pyrene simulated contaminated soil with a concentration of 1.24mg / kg was prepared, which was placed in a sterile dark environment for aging for 1 month.

[0025] Elution method: Accurately weigh 8.0g of benzo[a]pyrene contaminated soil into a 200ml Erlenmeyer flask, add 80ml of prepared soil eluent and mix well (solid-liquid ratio 1:10), seal 1. After wrapping with aluminum foil, place the Erlenmeyer flask in an air bath constant tempe...

Embodiment 2

[0028] Example 2 The elution effect of high concentration benzo[a]pyrene contaminated soil

[0029] The composition of soil eluent is: Tween80 of 4.0g / L, SDS of 1.0g / L, K of 1.0g / L 2 SiO 3 , the solvent is water.

[0030]Preparation of contaminated soil: Dissolve a certain amount of benzo[a]pyrene in dichloromethane solvent to make it fully dissolved, evenly spray it into the sterilized soil, let it dry naturally to volatilize the organic solvent in the soil, add sterile water to make the soil The water content reaches 30%, and the benzo[a]pyrene simulated contaminated soil with a concentration of 68.24mg / kg is prepared, which is placed in a sterile dark environment for aging for 1 month.

[0031] Elution method: Accurately weigh 8.0g of benzo[a]pyrene contaminated soil into a 200ml Erlenmeyer flask, add 120ml of prepared soil eluent and mix well (solid-liquid ratio 1:15), seal 1. After wrapping with aluminum foil, place the Erlenmeyer flask in an air bath constant temperat...

Embodiment 3

[0034] Example 3 The elution effect of benzo[a]pyrene polluted aging soil

[0035] The composition of soil eluent is: Tween80 of 4.0g / L, SDS of 1.0g / L, K of 1.0g / L 2 CO 3 , the solvent is water.

[0036] Preparation of contaminated soil: Dissolve a certain amount of benzo[a]pyrene in dichloromethane solvent to fully dissolve it, and spray it evenly into the sterilized soil, place it at room temperature to volatilize the organic solvent in the soil, add sterile Water was used to make the soil moisture content reach 30%, and benzo[a]pyrene simulated contaminated soil with a concentration of 68.24mg / kg was prepared, which was placed in a sterile dark environment for aging for 6 months.

[0037] Elution method: Accurately weigh 8.0g of benzo[a]pyrene contaminated soil into a 200ml Erlenmeyer flask, add 120ml of prepared soil eluent and mix well (solid-liquid ratio 1:15), seal 1. After wrapping with aluminum foil, place the Erlenmeyer flask in an air bath constant temperature sh...

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Abstract

The invention discloses an eluent for benzo[a]pyrene in soil and an elution method thereof. The eluent for benzo[a]pyrene in soil is composed of a nonionic surfactant, an anionic surfactant, an inorganic salt and a solvent. The nonionic surfactant is Tween-80; the anionic surfactant is sodium dodecyl sulfate; a mass ratio of Tween-80 to sodium dodecyl sulfate is 3-4: 1; the total concentration of Tween-80 and sodium dodecyl sulfate in the elute is 4.0 to 5.0 g / L; the inorganic salt is K2SiO3 or K2CO3, and the concentration of K2SiO3 or K2CO3 in the elute is 1.0 g / L; and the solvent is water.

Description

technical field [0001] The invention belongs to the technical field of soil organic pollution treatment, and in particular relates to an eluent for benzo[a]pyrene in soil and an eluting method thereof. Background technique [0002] In recent years, with the use of fossil fuels and the intensification of energy consumption, a large number of polycyclic aromatic hydrocarbons (PAHs) pollutants have been discharged into the environment through various channels. It is predicted that the current annual discharge of PAHs in my country is above 10,000 tons, and the presence of such pollutants has been detected in the atmosphere, soil, water, and even food, especially in the soil, which poses a potential threat to the quality of agricultural products and the health of the population. . Among the numerous PAHs pollutants, benzo[a]pyrene with 5 aromatic ring structures is the most harmful and has been proven to have strong "three-cause effects", and its carcinogenic toxicity accounts f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/02C09K101/00
Inventor 肖鹏飞
Owner NORTHEAST FORESTRY UNIVERSITY
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