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Rooting zone restoration method of high concentration oil pollution saline alkali soil

A technology for petroleum-contaminated and saline-alkali soils, which is applied in the field of bioremediation of petroleum-contaminated soils, can solve pollution and other problems, and achieve the effects of high treatment efficiency, simple treatment methods, and low material costs

Inactive Publication Date: 2013-04-24
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a rhizosphere restoration method for petroleum-contaminated saline-alkali soil for the problem of high-concentration oil pollution in saline-alkali soil in coastal areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Collect oil-contaminated soil, the oil concentration is 18800mg Kg -1 , the pH value is 8.4, and the salinity is 3.5‰. First disperse the contaminated soil evenly, add corn stalks (2cm×4cm), peanut pods and sawdust mixture twice the volume as soil filler, the volume ratio of the three materials in the filler is 1:1:2, adjust carbon and nitrogen Ratio to 15 (C:N=15:1), adjust the humidity of the soil to be 40% of the saturated moisture content. Suaeda salsa is sown at 8kg / mu, and the sowing method is drill. Sow the seeds at a plant spacing of 15cm, a row spacing of 30cm, and a sowing depth of 1.5cm. When the seedlings grow to a height of 5-7cm, the seedlings are seeded according to the spacing between the plants when the height of the seedlings is 10-12cm. During plant cultivation, water every 3-5 days to ensure that the moisture content of the soil is 40-60% saturated moisture content. After 180 days of plant growth, the rhizosphere soil pH dropped to 7.6, and the S...

Embodiment 2

[0011] Collect oil-contaminated soil, the oil concentration is 18800mg Kg -1 , the pH value is 8.4, and the salinity is 3.5‰. First disperse the contaminated soil evenly, add corn stalks (2cm×4cm), peanut pods and sawdust mixture twice the volume as soil filler, the volume ratio of the three materials in the filler is 1:1:2, adjust carbon and nitrogen Ratio to 15 (C:N=15:1), adjust the humidity of the soil to be 40% of the saturated moisture content. Central Asian amarina is sown at a rate of 10kg / mu, and the sowing method is drill sowing. Sowing is carried out according to the plant spacing of 20cm, the row spacing of 30cm, and the sowing depth of 2.0cm. When the seedlings grow to a height of 5-7cm, the seedlings are seeded according to the spacing between the plants when the height of the seedlings is 10-12cm. During plant cultivation, water every 3-5 days to ensure that the moisture content of the soil is 40-60% saturated moisture content. After 180 days of plant growth...

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Abstract

The invention relates to a rooting zone restoration method of a high concentration oil pollution saline alkali soil. The rooting zone restoration method is characterized by comprising the following steps of: firstly mixing soil and crop straws with the volume 1-4 times that of the soil, and adjusting carbon-nitrogen ratio to be 10 to 25; then, reciprocating and plowing the soil and auxiliary materials so as to tile, and adjusting the water ratio of the soil to 40-60% of saturated water content; adopting common halophyte as a restoration plant, and when seedlings grow to 5-7cm, fixing the seedlings according to the seed spacing when the heights of the seedlings are 10-12 cm; watering every 3-5 days in a plant culture period, and guaranteeing that the water ratio of the soil is 40-60% of saturated water content; and achieving the restoration standard after the plant grows for 180 days according to that the rooting zone soil petroleum hydrocarbon concentration is lower than 500 mg kg-1 of nation agriculture standard critical value. The rooting zone restoration method provided by the invention has the advantages that the processing method is simple, the material cost is low, the treatment efficiency is high, the rooting zone restoration method is a governing scheme which is high-efficient, economic, persistent and is small in environmental disturbance, finally the petroleum hydrocarbon content in the soil is reduced to the low concentration, and the rooting zone restoration method has remarkable economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the field of bioremediation of petroleum-contaminated soil, and in particular relates to a rhizosphere restoration method of high-concentration petroleum-contaminated saline-alkali soil. Background technique [0002] Oil pollution has become an environmental problem of widespread concern around the world, and the establishment of efficient, economical, durable and less disturbing environmental remediation technology is currently a hot spot in international research. The high-concentration oil-contaminated soil in coastal wetlands is seriously salinized, and its effective restoration is even more difficult in research. [0003] The bioremediation of oil-contaminated soil mainly includes microbial remediation, phytoremediation and phyto-microbial joint remediation. Microbial remediation is often affected and limited by many environmental conditions, such as nutrition, moisture, pH, etc. How to create the most suitable biodegrad...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 王震宇许颖郑浩赵建李锋民
Owner OCEAN UNIV OF CHINA