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Bioremediation agent for oil-contaminated saline-alkali soil and application of bioremediation agent

A bioremediation agent and saline-alkali land technology, applied in the field of soil remediation, can solve the problems of low biodegradation efficiency and poor environmental adaptability, and achieve the effects of accelerating electron transfer, shortening the repair cycle, and simple processing and use methods

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a bioremediation agent for oily saline-alkali soil and its application. The bioremediation agent has the characteristics of high economy and environmental protection, and solves the environmental adaptability of the existing oily saline soil bioremediation bacteria agent. Poor and low biodegradation efficiency

Method used

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  • Bioremediation agent for oil-contaminated saline-alkali soil and application of bioremediation agent
  • Bioremediation agent for oil-contaminated saline-alkali soil and application of bioremediation agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1 Nano carbamide peroxide particle A 1 preparation

[0047] (1) Add 100 g of urea and 150 mL of 20% (w) hydrogen peroxide to 350 mL of water, and stir to obtain a mother liquor.

[0048] (2) 50 g of urea, 250 mL of 30% (w) hydrogen peroxide, and 25 g of sodium alkyl benzene sulfonate were added to the above mother liquor, and the reaction was carried out at 40° C. for 20 min.

[0049] (3) The above solution was allowed to stand at 2°C for 12h to crystallize, then suction filtered to obtain crystals, and dried at 35°C to obtain nano carbamide peroxide particles A 1 .

Embodiment 2

[0050] Example 2 Nano carbamide peroxide particle A 2 preparation

[0051] (1) Add 150 g of urea and 150 mL of 20% (w) hydrogen peroxide to 350 mL of water, and stir to obtain a mother liquor.

[0052] (2) Add 100 g of urea, 500 mL of 30% (w) hydrogen peroxide, and 50 g of sodium alkyl benzene sulfonate to the above mother liquor, and react at 30° C. for 30 min.

[0053] (3) The above solution was allowed to stand at 3°C ​​for 13h to crystallize, followed by suction filtration to obtain crystals, and dried at 30°C to obtain nano carbamide peroxide particles A 2 .

Embodiment 3

[0054] Example 3 Nano carbamide peroxide particle A 3 preparation

[0055] (1) Add 120 g of urea and 150 mL of 20% (w) hydrogen peroxide to 350 mL of water, and stir to obtain a mother liquor.

[0056] (2) 80 g of urea, 360 mL of 30% (w) hydrogen peroxide, and 30 g of sodium alkyl benzene sulfonate were added to the mother liquor, and the reaction was carried out at 30° C. for 40 min.

[0057] (3) The above solution was allowed to stand at 4°C for 16h to crystallize, then suction filtered to obtain crystals, and dried at 40°C to obtain nano carbamide peroxide particles A 3 .

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Abstract

The invention relates to the technical field of soil remediation, in particular to a bioremediation agent for oil-contaminated saline-alkali soil and application of the bioremediation agent. The bioremediation agent is prepared from the following components in parts by mass: 22 to 45 parts of biomass filler; 42 to 78 parts of immobilized microspheres; 3-10 parts of a nutrition activator; wherein the biomass filler is prepared from wood chips, rice chaff, straws, cow dung, wheat bran and walnut shells; the immobilized microspheres are composed of saline-alkaline tolerant hydrocarbon-philic bacteria, biological enzyme, nano urea peroxide particles, sodium alginate and activated carbon. The nutrition activating agent is prepared from yeast powder, NH4Cl, urea and K2HPO4. All the components are low in price and easy to obtain, the processing and using method is simple, and the cost for repairing the oil-contaminated saline-alkali soil can be effectively reduced. The oil content of the remedied oil-contaminated soil is lower than 0.2%, the national environmental protection standard requirement is met, and the remediation period is shortened to be within 2 months from original 6 months or above.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a bioremediation agent for oil-polluted saline-alkali soil and its application. technical background [0002] The Bohai Bay Oil Region is the main crude oil producing area in my country, including Shengli Oilfield, Bohai Oilfield, Dagang Oilfield and Liaohe Oilfield. In 2019, crude oil production exceeded 80 million tons, accounting for 42% of domestic crude oil production. The geological features of the oil region around the Bohai Sea are soil salinization, surface-groundwater interaction, and complex hydrogeology. The oil area around the Bohai Bay belongs to the old oil area. The crude oil gathering and transportation pipelines have been in service for a long time, and there are serious aging phenomena. Corrosion and perforation are very likely to occur, causing crude oil to enter the surface soil and form oily soil. 1 / 3 of the total production. At the same time, due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/10B09C1/08B09C1/00
CPCC09K17/40B09C1/10B09C1/00B09C1/08
Inventor 丁明山王冠于丹丹冯逸茹岳胜辉徐鹏袁长忠曹功泽曹嫣镔宋永亭
Owner CHINA PETROLEUM & CHEM CORP
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