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Method for preparing composite board capable of simultaneously slowly releasing nitrogen and adsorbing/biologically degrading petroleum hydrocarbons

A biodegradable and composite board technology is applied in the field of composite board preparation for simultaneous slow release of nitrogen and adsorption-biodegradation of petroleum hydrocarbons, which can solve the problems of lack of technology and research reports, and achieve the effect of simple production process and high processing efficiency

Inactive Publication Date: 2013-03-20
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further popularize and apply the combination of physical adsorption and immobilized microorganisms for enhanced degradation in the treatment of oil spill pollution in water bodies, it is necessary to develop materials with both slow-release nitrogen and physical adsorption-biodegradation of petroleum hydrocarbons. This is of great significance for improving the efficiency of oil spill pollution treatment in water bodies and reducing environmental pollution, but there is still a lack of technology and research reports in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Transfer 65 mL of 50% urea aqueous solution into container A, 10 mL of 30% formaldehyde aqueous solution into container B, and then place them in a water bath at 45°C for 30 minutes; the molar concentration is The pH value of the aqueous urea solution is adjusted by 0.01mol / L NaOH solution and 0.005mol / L HCl solution with a molar concentration of 0.005mol / L; the aqueous formaldehyde solution in container B is added to the above-mentioned aqueous urea solution under stirring conditions of 1000r / min, and then set Stir in a water bath at 45°C under 1000r / min for 90 minutes; add NaOH solution with a molar concentration of 0.01 mol / L and an HCl solution with a molar concentration of 0.005 mol / L to the mixed solution to adjust the pH of the mixed solution to 3.2 ; Then placed in a 35°C water bath and stirred at 1000r / min for 90 minutes; 1875mL of deionized water was added dropwise to the above 75mL mixed solution under 1000r / min stirring to obtain 1950mL of mixed solution M1.

...

Embodiment 2

[0029] Transfer 65 mL of 50% urea aqueous solution into container A, 10 mL of 30% formaldehyde aqueous solution into container B, and then place them in a water bath at 45°C for 30 minutes; the molar concentration is The pH value of the urea aqueous solution was adjusted by 0.01mol / L NaOH solution and 0.005mol / L HCl solution with a molar concentration of 0.005mol / L; the aqueous formaldehyde solution in container B was added to the above urea aqueous solution under stirring conditions of 1000r / min, and then set Stir in a water bath at 45°C under 1000r / min for 90 minutes; add NaOH solution with a molar concentration of 0.01 mol / L and an HCl solution with a molar concentration of 0.005 mol / L to the mixed solution to adjust the pH of the mixed solution to 3.4 ; Then placed in a 35°C water bath and stirred at 1000r / min for 90 minutes; 1875mL of deionized water was added dropwise to the above 75mL mixed solution under 1000r / min stirring to obtain 1950mL of mixed solution M1.

[0030] M...

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Abstract

The invention discloses a method for preparing a composite board capable of simultaneously slowly releasing nitrogen and adsorbing / biologically degrading petroleum hydrocarbons. The method comprising the steps of weighing urea aqueous solution and formaldehyde aqueous solution in the proportion of 6.5:1 and regulating the pH value of the urea aqueous solution to 7.2-7.4; adding formaldehyde into the urea aqueous solution, stirring, regulating the pH value to 3.2-3.4 and adding deionized water to obtain a mixed solution M1; mixing poly(beta-hydroxybutyrate) and chloroform solution of polyethylene glycol in the proportion of 5:1; dropwise adding the M1 into the mixed chloroform solution in the proportion of 1:4; spraying distilled water into a container filled with liquid nitrogen to manufacture ice ball particles, screening, and putting in a mould to compact; pouring the mixed solution into the mould, carrying out freezing shaping and obtaining a composite board after demoulding and freezing; and culturing the composite board in a petroleum hydrocarbon degrading bacteria solution for 24h, drying in the air and obtaining the composite board capable of simultaneously slowly releasing nitrogen and adsorbing / biologically degrading petroleum hydrocarbons. The method disclosed by the invention has the advantages that the manufacturing process is simple; and the obtained composite board is high in petroleum hydrocarbon pollutant treating efficiency and incapable of causing secondary pollution and damage to the water ecological environment.

Description

Technical field [0001] The invention belongs to the technical field of treatment of water bodies contaminated by oil spills, and particularly relates to a method for preparing a composite board for simultaneous slow-release of nitrogen and adsorption-biodegradation of petroleum hydrocarbons. Background technique [0002] In recent years, with the increasing demand for oil and its products from all over the world, oil spills have occurred from time to time in the process of offshore exploration, loading and unloading, transportation and utilization of oil, which not only caused a large amount of crude oil loss, but also caused serious pollution to the environment. Increasingly serious threats to the ecological environment of water bodies and land areas, and long-term harm to the water environment, natural resources and breeding resources, etc. Therefore, oil spill pollution in water bodies has become a major environmental problem that people must face. [0003] At present, the main ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/32
Inventor 豆俊峰袁静丁爱中程莉蓉云影
Owner BEIJING NORMAL UNIVERSITY
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