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Application of poly-dopamine composite magnetic micro-nano particles in oily sewage treatment

A technology of micro-nano particles and composite magnetism, which is applied in the cross field of micro-nano materials and environmental engineering, can solve the problems of difficult separation and high processing cost

Inactive Publication Date: 2014-10-15
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of the existing oil-water separation materials, technologies and processes for the separation of oilfield sewage, especially the tertiary production wastewater containing polymers, and the high cost of treatment

Method used

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  • Application of poly-dopamine composite magnetic micro-nano particles in oily sewage treatment
  • Application of poly-dopamine composite magnetic micro-nano particles in oily sewage treatment
  • Application of poly-dopamine composite magnetic micro-nano particles in oily sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Preparation of a layer of polydopamine surface modified biomimetic composite magnetic ferric oxide micro-nano particles:

[0028] At room temperature of 20°C, add 50mL of distilled water, 0.40g of ferrous chloride tetrahydrate, 1.08g of ferric chloride nonahydrate and 0.1g of dopamine hydrochloride into a 100mL three-necked round-bottomed flask in turn, stir until fully dissolved, and slowly 1M sodium hydroxide aqueous solution was added dropwise to maintain the pH of the reaction system between 9.0-9.5, and reacted for 2 hours to obtain a mixed solution. Then quickly add 5mL of 2M sodium hydroxide aqueous solution, and then raise the temperature to 75°C under the protection of nitrogen, and react for 1 hour to obtain a layer of polydopamine surface modified biomimetic composite magnetic ferric oxide micro-nanoparticles.

Embodiment 2

[0029] Example 2. Preparation of a layer of polydopamine surface modified biomimetic composite magnetic ferric oxide micro-nano particles:

[0030] At room temperature of 25°C, add 50mL of distilled water, 0.52g of ferrous sulfate heptahydrate and 1.616g of ferric chloride nonahydrate into a 100mL three-neck round bottom flask successively, stir until fully dissolved, and slowly add 5mL of 1M sodium hydroxide dropwise and a mixed aqueous solution of 0.08g dopamine to maintain the pH of the reaction system between 9.0-9.5, react for 2 hours to obtain a mixed solution; then quickly add 5mL of 2M sodium hydroxide aqueous solution, and then raise the temperature to 85°C for 1 hour under the protection of nitrogen , that is to obtain a layer of polydopamine surface modified biomimetic composite magnetic ferric oxide micro-nano particles.

Embodiment 3

[0031] Example 3. Preparation of a layer of polydopamine surface modified biomimetic composite magnetic ferric oxide micro-nano particles:

[0032] Under the conditions of constant stirring and nitrogen protection, 30 mL of distilled water, 20 mL of 1M sodium hydroxide, and 0.1 g of L-dopamine were successively added to a 100 mL three-necked round-bottomed flask, and the temperature was raised to 80 °C, and then 0.52 g of ferrous sulfate heptahydrate was slowly added dropwise. and 1.93g of ammonium ferric sulfate dodecahydrate mixed aqueous solution, continue to react for 1h after the dropwise addition, then lower to room temperature 20-30°C, and stop the nitrogen protection, maintain the pH of the reaction system = 8.5, react for 2h, and obtain a layer Biomimetic composite magnetic Fe3O4 micro-nanoparticles modified by polydopamine surface modification.

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Abstract

The invention belongs to the technical field of intersection of micro-nano materials and environmental engineering and relates to application of poly-dopamine composite magnetic micro-nano particles in oily sewage treatment. Poly-dopamine similar to the glossopodium component of a mussel is used as the surface modifier of magnetic ferroferric oxide micro-nano particles to prepare core-shell-shaped bionic composite magnetic micro-nano particles, and the composite magnetic micro-nano particles are used as oil-water separation materials for treating oily sewage. Due to the super-high bionic adhesion capacity, the composite magnetic micro-nano particles have super-high capacity of capturing oil drops in the oily sewage, so that an extremely high oil-water separation effect is realized. The raw materials are available, the method is simple and environmental friendly, the reaction is mild and the reaction speed is high; the operation of oil water separation is simple, the cost is low, the oil water separation effect is good, and industrial implementation is facilitated; the technical problem that oily sewage, particularly sewage produced during oil production for three times is difficult to treat is solved, and the poly-dopamine composite magnetic micro-nano particles have extremely important practical significance on resource conservation and environment protection.

Description

technical field [0001] The invention belongs to the intersecting technical field of micro-nano materials and environmental engineering, and relates to the application of polydopamine composite magnetic micro-nano particles in the treatment of oily sewage. Background technique [0002] With the rapid development of the economy, the country's demand for oil resources is also rising rapidly. However, as a fossil resource, oil reserves are limited, so in order to fully exploit oil resources, oil exploitation has gone through several stages of development: primary oil recovery, secondary oil recovery and tertiary oil recovery. At present, most oil fields in my country have entered the middle and late stages of development, and secondary and tertiary oil recovery technologies are widely used. Secondary oil recovery is to inject water into the oil wells of primary oil recovery to replenish the energy of the oil layer, and tertiary oil recovery is to add polymers, binary compounds,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/40C02F1/48C08G73/02
Inventor 干为朱雪锋李守柱杨艳艳吴畏
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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