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Preparation method of microsphere particles capable of slowly releasing nitrogen and adsorbing-biologically degrading petroleum hydrocarbon

A biodegradation and slow-release nitrogen technology, applied in the preparation of microspheres, chemical instruments and methods, separation methods, etc., 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: 2013-03-13
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Effect test

Embodiment 1

[0022] 65mL mass fraction of 50% urea aqueous solution was moved into A container, 10mL mass fraction of 30% formaldehyde solution was moved into B container, and then they were respectively placed in a 45°C water bath to keep the temperature for 30 minutes; the dropwise molar concentration was The NaOH solution of 0.01mol / L and the HCl solution with a molar concentration of 0.005mol / L are used to adjust the pH value of the aqueous urea solution to 7.2; the formaldehyde solution in the B container is added to the above-mentioned aqueous urea solution under stirring conditions of 1000r / min, and then placed Stir in a water bath at 45°C under the condition of 1000r / min for 90 minutes; add NaOH solution with a molar concentration of 0.01mol / L and HCl solution with a molar concentration of 0.005mol / L to the mixed solution to adjust the pH value of the mixed solution to 3.2 ; Then placed in a water bath at 35°C and stirred at 1000r / min for 90 minutes; 1875mL of deionized water was ad...

Embodiment 2

[0028]65mL mass fraction of 50% urea aqueous solution was moved into A container, 10mL mass fraction of 30% formaldehyde solution was moved into B container, and then they were respectively placed in a 45°C water bath to keep the temperature for 30 minutes; the dropwise molar concentration was The NaOH solution of 0.01mol / L and the HCl solution that the molar concentration is 0.005mol / L regulate the pH value of the urea aqueous solution to be 7.4; The formaldehyde aqueous solution in the B container is added in the above-mentioned urea aqueous solution under 1000r / min stirring condition, then place Stir in a water bath at 45°C under the condition of 1000r / min for 90 minutes; add NaOH solution with a molar concentration of 0.01mol / L and HCl solution with a molar concentration of 0.005mol / L to the mixed solution to adjust the pH value of the mixed solution to 3.4 ; Then placed in a water bath at 35°C and stirred at 1000r / min for 90 minutes; 1875mL of deionized water was added dro...

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Abstract

The invention discloses a preparation method of microsphere particles capable of slowly releasing nitrogen and adsorbing-biologically degrading petroleum hydrocarbon. The method comprises the following steps of: weighing a urea aqueous solution and a formaldehyde aqueous solution at a ratio of 6.5:1, and adjusting the pH value of the urea aqueous solution to 7.2-7.4; adding formaldehyde into the urea aqueous solution, stirring for 90-100 minutes, adjusting the pH value to 3.2-3.4, and adding deionized water to obtain mixed liquid M1; mixing the chloroform solutions of poly(beta)hydroxybutyrate and polyethylene glycol at a ratio of 5:1; dropwise adding M1 into the chloroform mixed liquid at a ratio of 1:4; dropwise adding the mixed liquid into a polyvinyl alcohol solution with mass fraction of 3.5% at a ratio of 1:1; dropwise adding a polyvinyl alcohol solution with mass fraction of 0.5% into the mixed liquid at a ratio of 2:1, stirring for 7-8 hours, separating, and freeze-drying to obtain microsphere particles; and culturing the microsphere particles in a petroleum hydrocarbon degrading bacterium culture solution for 24 hours, taking out and air-drying. Through the invention, the preparation technology is simple, the efficiency of the prepared microsphere particles for treating petroleum hydrocarbon pollutants is high, and secondary pollution and damage to the water body are avoided.

Description

technical field [0001] The invention belongs to the technical field of treatment of oil-spill-polluted water bodies, and in particular relates to a preparation method of microsphere particles capable of slow-release nitrogen and adsorption-biodegradation of petroleum hydrocarbons. Background technique [0002] In recent years, with the increasing demand for oil and its products in various countries around the world, oil spill accidents have occurred frequently in the process of offshore mining, 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. It is increasingly threatening the ecological environment of water bodies and land areas, and has long-term harm to water body environment, natural resources and aquaculture resources. Therefore, oil spill pollution in water bodies has become a major environmental problem that people must face. [0003] At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/28C02F3/34B01J13/02
Inventor 豆俊峰袁静丁爱中程莉蓉云影
Owner BEIJING NORMAL UNIVERSITY
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