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Method for repairing nitrobenzene compound contaminated soil by utilizing flax

A technology for nitrobenzene and polluted soil, applied in the field of phytoremediation, can solve problems such as in-situ remediation of unsuitable contaminated soil, damage to soil structure, secondary pollution, etc., achieve outstanding remediation effect, restore soil quality, slow down wind erosion and water erosion Effect

Inactive Publication Date: 2012-07-04
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical and chemical methods have a good effect on the remediation of highly polluted sites, but the cost is high, and the remediation process is likely to cause secondary pollution, which will destroy the structure of the soil, and is not suitable for in-situ remediation of polluted soil.
The high-efficiency degrading bacteria screened by biological methods are based on laboratory results, but in actual polluted soil, the survival of degrading bacteria and their actual degradation capacity will become important limiting factors for their successful restoration

Method used

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  • Method for repairing nitrobenzene compound contaminated soil by utilizing flax
  • Method for repairing nitrobenzene compound contaminated soil by utilizing flax
  • Method for repairing nitrobenzene compound contaminated soil by utilizing flax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1 utilizes flax to repair the method for nitrobenzene compounds polluted soil, comprises the following steps:

[0056] (1) After the mixture of the soil polluted by red water, lime soil and urban dewatered sludge is mixed evenly according to the dry weight ratio (kg / kg) of 1:14.5, the mixed soil is obtained; wherein in the mixture, lime soil and urban dewatered sludge The dry weight ratio of the dewatered sludge was 13.5:1 (kg / kg).

[0057] (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 red water polluted soil to make the pH value of the mixed soil neutral, and then cultivate in the open air on the mixed soil flax.

[0058] (3) The flax is managed according to the conventional planting method. When the growth period of the flax is over, the flax can be cut.

Embodiment 2

[0059] Embodiment 2 utilizes flax to repair the method for nitrobenzene compound polluted soil, comprises the following steps:

[0060] (1) After the mixture of the soil polluted by red water, lime soil and urban dewatered sludge is mixed evenly according to the dry weight ratio (kg / kg) of 2:13.5, the mixed soil is obtained; wherein in the mixture, lime soil and urban dewatered sludge The dry weight ratio of the dewatered sludge was 12.5:1 (kg / kg).

[0061] (2) Add 0.02kg of wheat bran per kilogram of mixed soil into the mixed soil; and mix 10g of ferrous sulfate per kilogram of red water polluted soil to make the pH value of the mixed soil neutral, and then cultivate in the open air on the mixed soil flax.

[0062] (3) The flax is managed according to the conventional planting method. When the growth period of the flax is over, the flax can be cut.

Embodiment 3

[0063] Embodiment 3 utilizes flax to repair the method for nitrobenzene compound polluted soil, comprises the following steps:

[0064] (1) After the mixture of the soil polluted by red water and lime soil and urban dewatered sludge is mixed evenly according to the dry weight ratio (kg / kg) of 3:12.5, the mixed soil is obtained; wherein in the mixture, lime soil and urban dewatered sludge The dry weight ratio of the dewatered sludge was 11.5:1 (kg / kg).

[0065] (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 red water polluted soil to make the pH value of the mixed soil neutral, and then cultivate in the open air on the mixed soil flax.

[0066] (3) The flax is managed according to the conventional planting method. When the growth period of the flax is over, the flax can be cut.

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Abstract

The invention relates to a method for repairing nitrobenzene compound contaminated soil by utilizing flax, which comprises the following steps: firstly, mixing and homogenizing soil contaminated by red water and a mixture of sierozem and municipal sewage sludge pro rata to obtain mixed soil; secondly, adding wheat bran in the mixed soil; admixing ferrous sulfate, so that the pH value of the mixed soil is neutral; and then cultivating the flax in the open on the mixed soil; and thirdly, managing the flax in a conventional planting manner and cradling the flax when the growth period of the flax is over. The method is economical and green, is free from secondary pollution, is easy to accept by the masses, can be suitable for the large-area nitrobenzene compound contaminated soil and also can achieve the purpose of producing while repairing.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for using flax to repair soil polluted by nitrobenzene compounds. Background technique [0002] Nitrobenzene pollutants in the environment mainly include nitrobenzene, nitrochlorobenzene, nitrotoluene, nitrophenol, nitroaniline and nitrobenzoic acid, etc. These compounds are mainly used in pesticides, dyes, spices, pharmaceuticals, etc. , explosives and other raw materials or intermediates. It is estimated that the production of nitrobenzene in my country reached 19.81×10 in 1997 4 t, the highest record in history, increased by 2.3 times compared with 1990, and the average annual growth rate in seven years was 18.8%. The mass production and use of nitrobenzene compounds makes it easy for them to enter the environment through various channels, and the random discharge of waste water containing nitrobenzene compounds is the main way for them to en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 南忠仁曾潮生牛亚萍王胜利胡亚虎赵伟宾
Owner LANZHOU UNIVERSITY
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