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Method for using leguminous plants for restoring petroleum-polluted soil

A technology of leguminous plants and oil pollution, applied in the field of bioremediation, can solve the problems of non-occurrence and low cost

Inactive Publication Date: 2011-09-28
延安市微生物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, up to now, the bioremediation technology of leguminous plants is still in the theoretical research stage, and there is no simple, feasible and low-cost application method in practice in the prior art.

Method used

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  • Method for using leguminous plants for restoring petroleum-polluted soil
  • Method for using leguminous plants for restoring petroleum-polluted soil
  • Method for using leguminous plants for restoring petroleum-polluted soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment verifies the efficacy of Nitraria japonica repairing oil-contaminated soil with the comparative test of four partitions, the method is as follows:

[0039] The experimental plots were set up as follows: Experiment 1 and its control area (the control area does not plant Nitraria japonica, and adopts natural degradation), Experiment 2 and its control area, Experiment 3 and its control area, Experiment 4 and its control area. The size of each plot is: 12m x 12m, the interval between each plot is 20cm, and the plots are arranged in a line from west to east.

[0040] Use locally obtained crude oil as the carbon source, that is, pollutants, and evenly mix a certain amount of petroleum in the soil surface 20cm deep in the test area. and its control area 1.0%, 3 area and its control area 2.0%, 4 area and its control area 4.0%.

[0041] Carry out pretreatment with Nitraria japonica seeds according to the following method, first soak with concentrated sulf...

Embodiment 2

[0046] The present embodiment verifies the efficacy of Nitraria japonica repairing oil-contaminated soil with the comparative test of 2 partitions, the method is as follows:

[0047] The test plots were set up as follows: test 1 area and its control area (the control area does not plant Nitraria japonica, and uses natural degradation), test 2 area and its control area. The size of each plot is: 15m x 15m, the interval between each plot is 40cm, and the plots are arranged in a line from west to east.

[0048] Using crude oil obtained from an oil well as carbon source, that is, pollutants, a certain amount of oil was evenly mixed into the soil surface 40cm deep in the test area. area and its control area 10%.

[0049] Carry out the pretreatment of Nitraria japonica seeds according to the following method, first soak with concentrated sulfuric acid for 10 minutes, then soak with 10% sodium hypochlorite solution for 20 minutes, and then rinse with sterilized water for 5 times;

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Abstract

The invention discloses a method for using leguminous plants for restoring petroleum-polluted soil, which comprises the following steps: a pretreatment step, carrying out pretreatment on seeds of the leguminous plants; a culture step, carrying out moisture preservation culture on the seeds of the leguminous plants until white buds of the seeds are exposed out; a seeding step, seeding the seeds ofthe leguminous plants into the soil; a watering step, watering the soil after seeding in an unscheduled way; a plant removing step, removing the whole plant of the leguminous plants from the soil when the seeds of the leguminous plants grow to the flowering periods; and repeating the steps until the content of the petroleum hydrocarbon reaches the national standard of the environment safety. The invention has the advantages of low treatment cost, high speed, low consumption, high efficiency, low cost, mild reaction conditions and no secondary pollution, reduces the place damage, and can perfectly adapt to the in-situ restoration of large-area petroleum-polluted soil.

Description

technical field [0001] The invention belongs to the technical field of bioremediation, and in particular relates to a method for remediating oil-contaminated soil by using leguminous plants. Background technique [0002] my country's annual oil consumption reaches 450 million tons, of which about 100 million tons need to be imported. The lack of oil resources and the sharp rise in oil prices have brought great pressure to our economy. Vigorously developing circular economy and realizing efficient utilization and recycling of resources is an important way to achieve sustainable development, an inevitable choice based on China's national conditions, and an important decision for enterprises to adapt to the requirements of the situation. Bioremediation technology was developed under this background and developed rapidly in the 1990s as a pollution control engineering technology. [0003] Petroleum is a complex mixture composed of thousands of substances with different chemica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 李军邓振山苏永杰
Owner 延安市微生物研究所