Repair method of phenylamine compound-polluted soil

Aniline compound and polluted soil technology, applied in the field of phytoremediation, can solve problems such as in-situ repair of unsuitable polluted soil, damage to soil structure, secondary pollution, etc., so as to achieve no secondary pollution, good repair effect, The effect of increasing fertility

Inactive Publication Date: 2011-11-02
LANZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many studies on the remediation of aniline compounds polluted water at home and abroad, which mainly focus on the screening of highly efficient aniline compound degrading bacteria and the research on degradation characteristics, but in the remediation of its polluted soil, the current research has just started. start
There are physical, chemical, biological and plant methods for the remediation of soil contaminated by aniline compounds. However, the physical and chemical methods are costly, and they are likely to cause secondary pollution during the remediation process, which will destroy the structure of the soil and are not suitable for the original purpose of polluting soil. bit fix

Method used

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  • Repair method of phenylamine compound-polluted soil
  • Repair method of phenylamine compound-polluted soil
  • Repair method of phenylamine compound-polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 A kind of remediation method of aniline compound polluted soil, comprises the following steps:

[0049] (1) After the mixture of soil polluted by aniline compounds and lime soil and urban dewatered sludge is mixed uniformly according to the dry weight ratio (kg / kg) of 1: 14.5, mixed soil is obtained; wherein in the mixture, lime soil and The dry weight ratio of municipal dewatered sludge is 13.5:1 (kg / kg).

[0050] (2) Add 0.01kg of wheat bran per kilogram of mixed soil into the mixed soil; and mix 10g of ferrous sulfate per kilogram of contaminated soil to make the pH value of the mixed soil neutral, and then use open-air cultivation of purple flowers on the mixed soil Alfalfa or clover.

[0051] (3) The alfalfa or clover is managed according to the conventional planting method. When the growth period of the alfalfa or clover is over, the alfalfa or clover is mowed, leaving 3 to 5 cm of stubble.

Embodiment 2

[0052] Embodiment 2 A kind of remediation method of aniline compound polluted soil, comprises the following steps:

[0053] (1) After the mixture of soil polluted by aniline compounds and lime soil and urban dewatered sludge is mixed evenly according to the dry weight ratio (kg / kg) of 2: 13.5, mixed soil is obtained; wherein in the mixture, lime soil and The dry weight ratio of municipal dewatered sludge is 12.5:1 (kg / kg).

[0054] (2) Add 0.02kg of wheat bran to the mixed soil by adding 0.02kg of wheat bran per kilogram of mixed soil; and mix 10g of ferrous sulfate by every kilogram of polluted soil, so that the pH value of the mixed soil is neutral, and then adopt open-air cultivation of purple flowers on the mixed soil Alfalfa or clover.

[0055] (3) The alfalfa or clover is managed according to the conventional planting method. When the growth period of the alfalfa or clover is over, the alfalfa or clover is mowed, leaving 3 to 5 cm of stubble.

Embodiment 3

[0056] Embodiment 3 A kind of remediation method of aniline compound polluted soil, comprises the following steps:

[0057] (1) After the mixture of soil polluted by aniline compounds and lime soil and urban dewatered sludge is mixed evenly according to the dry weight ratio (kg / kg) of 3: 12.5, mixed soil is obtained; wherein in the mixture, lime soil and The dry weight ratio of municipal dewatered sludge is 11.5:1 (kg / kg).

[0058] (2) Add 0.015kg of wheat bran per kilogram of mixed soil into the mixed soil; and mix 10g of ferrous sulfate per kilogram of polluted soil to make the pH value of the mixed soil neutral, and then adopt open-air cultivation of purple flowers on the mixed soil Alfalfa or clover.

[0059] (3) The alfalfa or clover is managed according to the conventional planting method. When the growth period of the alfalfa or clover is over, the alfalfa or clover is mowed, leaving 3 to 5 cm of stubble.

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Abstract

The invention relates to a repair method of phenylamine compound-polluted soil, which comprises the following steps of: 1, uniformly mixing the phenylamine compound-polluted soil with a mixture of sierozem and city dewatering sludge according to a proportion to obtain mixed soil; 2, adding wheat bran in the mixed soil, stirring ferrous sulfate in so that the pH value of the mixed soil is neutral,planting lucerne or whitetip clover on the mixed soil in the open air; and 3, managing the lucerne or whitetip clover according to the conventional planting method, when the lucerne or whitetip clover grow up, cradling the lucerne or whitetip clover, and stubbling with length of 3-5cm. The invention has the advantages of low cost, small environment disturbance, no secondary pollution, easiness inpublic acceptance, and capabilities of being suitable for repair of large-area polluted areas and increasing soil organic matters and soil fertility.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating soil polluted by aniline compounds. Background technique [0002] Aniline compounds are intermediates in the synthesis of azo dyes, herbicides, insecticides, drugs, explosives, etc., and are degradation products of herbicides and insecticides in agricultural production. Aniline pollutants in the environment mainly come from its production process. Since the production of aniline compounds is generally based on nitroaromatic compounds as raw materials, a large amount of aniline and nitroaromatic compounds will be produced during the production process. Material waste, such as the annual production of 15,000 tons of aniline will discharge 2 million tons of aniline wastewater. The random discharge of wastewater containing aniline compounds is the main way for it to enter the soil. According to statistics, the annual production of an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 南忠仁胡亚虎曾潮生牛亚萍赵伟宾王胜利
Owner LANZHOU UNIVERSITY
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