Nanofiber membrane and membrane adsorbing assembly for extracting uranium from seawater and brine water and application of nanofiber membrane and membrane adsorbing assembly

A nanofiber membrane, brine technology, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor recycling performance, difficult to scale application, slow adsorption rate, etc. , to achieve the effect of stable cycle performance, improved mechanical strength and fast adsorption rate

Inactive Publication Date: 2015-11-25
和晶(上海)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, although the resin-based adsorbent has high mechanical strength, it has poor hydrophilicity and slow adsorption rate; although the fiber-based adsorbent has a fast adsorption rate, it has low mechanical strength and poor recycling performance, which makes it difficult for these two types of materials to be applied on a large scale.

Method used

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  • Nanofiber membrane and membrane adsorbing assembly for extracting uranium from seawater and brine water and application of nanofiber membrane and membrane adsorbing assembly

Examples

Experimental program
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Effect test

Embodiment 1

[0040] (1) Preparation of 0.1m by electrospinning 2 PET-PAN nanofiber film, wherein the content of PAN nanofiber is 0.625g, and the thickness of PAN nanofiber layer is 40 μm. A polyethylene (PE) hollow tube with a length of 50 mm and an outer diameter of 5 mm is used as the central tube, a polyvinyl chloride (PVC) tube with a length of 50 mm and an inner diameter of 20 mm is used as the membrane shell, and a PE grid with a thickness of 2 mm is used as the water distribution grid. Rolled membrane modules. Immerse the hand-rolled membrane module into the hydroxylamine hydrochloride solution with a mass fraction of 10%, and shake it in a 70°C water bath for 240 minutes. During the reaction, add sodium carbonate to maintain the pH value of the reaction system between 7-10, and take it out after the reaction is over. The membrane module was washed repeatedly with clean water until the pH was neutral, and then the amidoximated membrane was placed in a hydrochloric acid solution wit...

Embodiment 2

[0045] (1) Preparation of 4.0m by electrospinning 2 PET-PAN nanofiber film, wherein the content of PAN nanofibers is 50g, and the thickness of the PAN nanofiber layer is 40 μm. A polyethylene (PE) hollow pipe with a length of 1000mm and an outer diameter of 20mm is used as the central pipe, a polyvinyl chloride (PVC) pipe with a length of 1000mm and an inner diameter of 200mm is used as the membrane shell, and a PE grid with a thickness of 2mm is used as the water distribution grid. Machine-rolled to make a roll-type membrane module. see figure 1 , which is a schematic diagram of the device for the amidoximation reaction of the coiled membrane module. As shown in the figure, the configured hydroxylamine hydrochloride solution with a mass fraction of 10% is lifted from the drug dissolution tank 1 through the feed liquid pump 2, and then circulated through the feed pipeline 3 through the water distribution member 4 and injected into the rolled membrane module 5 , and then ret...

Embodiment 3

[0050] (1) Preparation of 4.0m by electrospinning 2 PET-PAN nanofiber film, wherein the content of PAN nanofibers is 50g, and the thickness of the PAN nanofiber layer is 40 μm. A polyethylene (PE) hollow pipe with a length of 1000mm and an outer diameter of 20mm is used as the central pipe, a polyvinyl chloride (PVC) pipe with a length of 1000mm and an inner diameter of 200mm is used as the membrane shell, and a PE grid with a thickness of 2mm is used as the water distribution grid. Machine-rolled to make a roll-type membrane module. like figure 1 As shown, the configured hydroxylamine hydrochloride solution with a mass fraction of 10% is lifted from the drug dissolving tank 1 by the feed liquid pump 2, and then circulated into the coiled membrane module 5 by the feed pipeline 3 through the water distribution member 4, and then Return to the medicine dissolving tank 1 via the discharge pipeline 7 to realize a cyclic reaction. Among them, the drug dissolving tank 1 is provid...

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Abstract

The invention discloses a nanofiber membrane and a membrane adsorbing assembly for extracting uranium from seawater and brine water and application of the nanofiber membrane and the membrane adsorbing assembly. The nanofiber membrane is prepared by the steps: preparing polyacrylonitrile into a spinning solution; depositing polyacrylonitrile nanowires on a macromolecular non-woven fabric through an electrostatic spinning process to obtain a polyacrylonitrile nanofiber membrane; and then carrying out amidoximation on the polyacrylonitrile nanofiber membrane to obtain the nanofiber membrane. The membrane adsorbing assembly is prepared by the steps: preparing the nanofiber membrane into a rolled membrane assembly; and then carrying out amidoximation on the rolled membrane assembly to obtain the nanofiber membrane adsorbing assembly. The membrane adsorbing assembly disclosed by the invention is high in adsorption capacity, great in adsorption rate, stable in recycling performance and high in mechanical strength. The membrane adsorbing assembly not only is suitable for extracting uranium element from water bodies such as seawater or brine water and the like, but also is suitable for separating and recovering other noble metal or heavy metal ions from industrial wastewater, underground water and drinking water separately as well as removing metal ions from an organic phase.

Description

technical field [0001] The invention relates to the technical field of nanofiber membranes, in particular to a nanofiber membrane for extracting uranium from seawater brine, a membrane adsorption component and applications thereof. Background technique [0002] Uranium is an important strategic energy material, which is of great significance to industry, agriculture, national defense and science and technology. With the exhaustion of fossil energy, the world's nuclear energy industry has been highly valued and developed rapidly, and the demand for uranium is also increasing day by day. However, the total reserves of uranium on land are only 3.0×10 9 kg, only enough for human use for several decades. With the rapid development of my country's national economy and the increasing demand for energy, more and more attention has been paid to nuclear energy. my country's nuclear power development policy has been adjusted from "moderate development" to "active development". By 20...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28C22B3/24C22B60/02C02F1/28C02F1/58
CPCY02P10/20
Inventor 姜标李继香邱长泉蒋步青刘怡赵延琴黄祚刚
Owner 和晶(上海)新能源科技有限公司
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