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Method for remediating soil contaminated with volatile organic compounds

A technology for volatile organic compounds and polluted soil, applied in the field of soil pollution remediation, can solve the problems of high treatment cost, low remediation efficiency, long treatment period, etc., and achieve the effect of reducing the thermal decomposition temperature, improving the effect and improving the effect.

Inactive Publication Date: 2017-06-13
CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are generally problems such as low restoration efficiency, incomplete removal, long treatment cycle, and high treatment cost.

Method used

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  • Method for remediating soil contaminated with volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Take 10kg of organic polluted soil for volatile organic compound detection; through crushing and screening, soil particles with good dispersion are obtained, with a particle size range of 1-15mm; the specific surface area of ​​100g is 360m2 / g, and the specification is Φ8 -10 activated alumina particles were added to the soil particles; 200g of sodium dodecylbenzenesulfonate powder was added to the soil particles; pure water was added to the soil particles in a proportion of 1 L, and stirred for 30 minutes to obtain a soil aqueous solution mixture;

[0031] 2. The soil aqueous solution mixture is placed in the desorber with heating device of the vacuum desorption device, the temperature is 350 ° C, the treatment time is 10 minutes, the internal pressure of the vacuum reactor is 20kpa, and at the same time, the compression of the upper part of the desorber with the heating device is used. The device pressurizes the desorber, applying a pressure of 10Mpa, the solution in...

Embodiment 2

[0036] 1. Take 10kg of organic polluted soil for volatile organic compound detection; through crushing and screening, soil particles with good dispersion are obtained, with a particle size range of 1-15mm; the specific surface area of ​​100g is 360m2 / g, and the specification is Φ8 -10 activated alumina particles were added to the soil particles; 200g of sodium dodecylbenzenesulfonate powder was added to the soil particles; 0.5L of purified water was added to the soil particles, and stirred for 20min to obtain a soil aqueous solution mixture;

[0037] 2. The soil aqueous solution mixture is placed in the desorber with heating device of the vacuum desorption device, the temperature is 300°C, the processing time is 5min, the internal pressure of the vacuum reactor is 20kpa, and the applied pressure is 5Mpa. The compression device on the upper part of the desorber pressurizes the desorber, and the solution in the soil particles flows out through the sieve plate at the lower part of...

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Abstract

The invention provides a method for remediating soil contaminated with volatile organic compounds. The method comprises the steps that the contaminated soil is subjected to crushing and screening treatment, activated aluminum oxide is added into soil particles according to the proportion of 10g: 1kg, sodium dodecyl benzene sulfonate is added into the soil particles according to the proportion of 20g:1kg, and 0.5-1 L of purified water is added into the soil particles to obtain a soil mixture; and then the soil mixture is placed into a desorber, provided with a heating unit and a compressing unit, of a vacuum desorption device, compressing and heating desorption is conducted, the volatile organic compounds in the soil are desorbed under heating and squeezing effects, and purified soil is obtained. The method is easy in implementing process, easy to operate, free of secondary pollution in the whole process, high in desorption efficiency, and suitable for treating heavily organic contaminated soil.

Description

[0001] Technical field: [0002] The invention relates to the technical field of soil pollution remediation, in particular to a method for remediation of soil polluted by volatile organic compounds. [0003] technical background: [0004] With the development of my country's economy, more and more organic chemicals are released into the natural environment, most of which enter the soil environment, and the soil ecosystem has become the largest receptor for organic pollutants, and even some organic pollutants are toxic, Bioaccumulation, which can persist in the soil environment, is increasingly harmful to the ecological environment and human health. At the same time, with the acceleration of urbanization and industrialization, the organic pollution of soil near cities and industrial areas has become increasingly serious, and organic pollutants such as polycyclic aromatic hydrocarbons, pesticides, polychlorinated biphenyls, and phthalates The soil exceeds the national standard ma...

Claims

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Application Information

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IPC IPC(8): B09C1/06B09C1/08
CPCB09C1/065B09C1/08
Inventor 张柏林周艳易师
Owner CHANGSHA HUIJU ENVIRONMENTAL TECH CO LTD
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