Experiment apparatus for removing pollutants from soil, and method thereof

An experimental device and technology for pollutants, applied in the restoration of polluted soil, etc., can solve the problems of destroying the physical and chemical properties of the soil, and the soil cannot be reused, and achieve the effect of high efficiency, good removal effect, and strong applicability.

Inactive Publication Date: 2013-03-06
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, high-temperature incineration will destroy the physical and chemical properties of the soil, making the soil unable to be reused.

Method used

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  • Experiment apparatus for removing pollutants from soil, and method thereof
  • Experiment apparatus for removing pollutants from soil, and method thereof
  • Experiment apparatus for removing pollutants from soil, and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 1 as shown,

[0033] The eluent column 3 is made of plexiglass material, with a hollow cylindrical structure in the middle. The two ends of the eluent column 3 are respectively sealed and connected to the discharge liquid storage tank 1 and the eluent storage tank 2 through flanges, in which the eluent is stored Between the tank 2 and the lower end of the washing column 3, there is a partition 4 for placing polluted soil. The eluent storage tank 2 is inserted with a plurality of eluent inlet switches 5, one end of each eluent inlet switch 5 communicates with the peristaltic pump 7 through the liquid inlet pipe 6, and the other end passes through the partition plate 4 , a diffusion head 8 is provided. The diffusion head 8 is located inside the washing column 3, and delivers the washing liquid to the polluted soil. A plurality of drain valves 9 are inserted in the drain liquid storage tank 1 , one end of each drain liquid valve 9 communicates with the dr...

Embodiment 2

[0040] The difference from Example 1 is that the tested soil leached is diesel-contaminated soil, and the diesel content in the soil is 22623mg / kg, wherein the content of polycyclic aromatic hydrocarbons is 187.84mg / kg, accounting for 0.83% of the total amount of diesel oil, more than Aromatic hydrocarbons are mainly phenanthrene (Phe), pyrene (Pyr), benzo(a) anthracene (Baa), and chrysene (Chry).

[0041] The diesel-polluted soil is prepared soil, which is prepared by adding diesel oil to clean soil. The clean soil is collected from 0-20 cm of non-polluted topsoil in the farmland of the Shenyang Ecological Station of the Chinese Academy of Sciences. After the soil was air-dried, it was ground and passed through a 2mm sieve. The soil passed through the 2mm sieve was mixed with the No. 0 diesel petroleum ether solution, and air-dried for 2 days under ventilated conditions. After the petroleum ether was completely volatilized, it was stored at 4°C for later use. The main physic...

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Abstract

The invention relates to a petroleum and PAHs polluted soil treatment technology, and concretely relates to an experiment apparatus for removing pollutants from soil, and a method thereof. A discharged solution storage tank, an elution column and an eluant storage tank are sequentially connected, the discharged solution storage tank is communicated with a solution storage bottle through a liquid discharge tube, and the eluant storage tank is communicated with a peristaltic pump through solution inlet tubes. The peristaltic pump can control the simultaneous performing of elution experiments of a plurality of elution columns. The eluant mobility mode is bottom-top mobility. According to the invention, the concentrations of the pollutants in the discharged solution can be momentarily monitored and the input and output flow velocities of the eluant can be momentarily regulated depended on experiment needs. The apparatus and the method can be applied to experiment researches, and can provide theoretical and technical parameters for the practical scale processing engineering.

Description

technical field [0001] The invention relates to oil and PAHs polluted soil treatment technology, in particular to an experimental device and method for removing pollutants in soil. Background technique [0002] Pollutants with strong toxicity, refractory degradation, long residual time, and wide distribution in the environment are prioritized for control, and are called priority pollutants. The U.S. Environmental Protection Agency (USEPA) first published 129 priority pollutants in 1976. On the basis of our research, our country has also proposed the first batch of 68 chemical pollutants as priority pollutants. Due to its low water solubility and strong adsorption on soil particles, 16 kinds of PAHs such as fluorene, naphthalene, anthracene, benzo[a]pyrene, etc. are listed as priority pollutants by the US Environmental Protection Agency (EPA), and fluorescent Six PAHs including anthracene and benzo(a)pyrene were used as target PAHs. The Chinese government has also listed 7...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 巩宗强李晓军孙翼飞刘丹张海荣
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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