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Efficient water-processing method combining super-hydrophilicity nanofiltration membrane and super-hydrophobicity nanofiltration membrane

A nanofiltration membrane, super hydrophilic technology, applied in the field of membrane separation, can solve problems such as unimproved

Inactive Publication Date: 2015-12-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no researchers have improved the treatment process based on the hydrophilicity and hydrophobicity of the pollutants and the membrane surface.

Method used

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  • Efficient water-processing method combining super-hydrophilicity nanofiltration membrane and super-hydrophobicity nanofiltration membrane
  • Efficient water-processing method combining super-hydrophilicity nanofiltration membrane and super-hydrophobicity nanofiltration membrane
  • Efficient water-processing method combining super-hydrophilicity nanofiltration membrane and super-hydrophobicity nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The water samples for the experiment were taken from the Jingmi Diversion Canal, with a relatively high content of hydrophobic substances, and the date of water collection was March 15, 2015. The super-hydrophilic membrane used is a flat nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 4.9° in 3 seconds, and the membrane area is 23 cm 2 . The super-hydrophobic membrane used is a flat-plate nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 162.2° in 3 seconds, and the membrane area is 23 cm 2 .

[0036] (1) Take 10L water sample, filter it with a 0.45 μm microporous membrane, and store it in a 4° refrigerator until use.

[0037] (2) Place the superhydrophilic membrane and the superhydrophobic membrane in 5 and 10 respectively.

[0038] (3) Take 5L of the solution in step (1) and put it into 1, turn on 2, adjust 3 so that the reading in 4 is st...

Embodiment 2

[0063] The water samples for the experiment were taken from the Jingmi Diversion Canal, with a relatively high content of hydrophobic substances, and the date of water collection was March 15, 2015. The super-hydrophilic membrane used is a flat nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 4.9° in 3 seconds, and the membrane area is 23 cm 2 . The super-hydrophobic membrane used is a flat-plate nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 162.2° in 3 seconds, and the membrane area is 23 cm 2 .

[0064] (1) Take 10L water sample, filter it with a 0.45μm microporous membrane, and store it in a 4° refrigerator until use.

[0065] (2) Place the superhydrophobic membrane and the superhydrophilic membrane in 5 and 10 respectively.

[0066] (3) Put 5L of the solution in step (1) into 1, turn on 2, adjust 3 so that the reading of 4 is stable at 0.6MP...

Embodiment 3

[0082] The water samples for the experiment were taken from the Jingmi Diversion Canal, with a relatively high content of hydrophobic substances, and the date of water collection was March 15, 2015. The super-hydrophilic membrane used is a flat nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 3.1° in 3 seconds, and the membrane area is 23 cm. 2 . The superhydrophobic membrane used is a flat-plate nanofiltration membrane. When 5 μL of pure water is dropped on the surface of the membrane, the contact angle is 167.2° in 3 seconds, and the membrane area is 23 cm 2 .

[0083] (1) Take 10L water sample, filter it with a 0.45μm microporous membrane, and store it in a 4° refrigerator until use.

[0084] (2) Place the superhydrophilic membrane and the superhydrophobic membrane in 5 and 10 respectively.

[0085] (3) Take 5L of the solution in step (1) and put it into 1, turn on 2, adjust 3 so that the reading in 4 is sta...

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Abstract

An efficient water-processing method combining super-hydrophilicity nanofiltration membrane and super-hydrophobicity nanofiltration membrane is disclosed and belongs to the technical field of membrane separation. The method comprises firstly pretreating a natural water source to remove suspensions, colloids, bacteria and other substances, and then using a super-hydrophilicity nanofiltration membrane or a super-hydrophobicity nanofiltration membrane to perform filtration, so as to effectively remove hydrophilic and hydrophobic substances in the water body step by step. By using the method, pollutants with different hydrophilicity / hydrophobicity in the water body are efficiently removed step by step, also the membrane assembly is endowed with good antipollution performance, and the water outlet quality of the drinking water is substantially improved.

Description

technical field [0001] The invention relates to a high-efficiency water treatment method combined with super-hydrophilic (repellent) nanofiltration membranes, and belongs to the technical field of membrane separation. Background technique [0002] In recent years, with the rapid development of my country's economy and the acceleration of industrialization and urbanization, a large amount of domestic and industrial wastewater has been discharged into water bodies, which has increasingly polluted the drinking water sources that human beings rely on for survival. According to reports, more than 90% of drinking water sources in my country are slightly polluted water bodies, and about 300 million people in the country cannot drink drinking water that meets the standards. The safety of drinking water has attracted widespread attention from all walks of life. Due to the continuous deterioration of drinking water sources, the traditional coagulation, sedimentation, filtration and di...

Claims

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Application Information

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IPC IPC(8): C02F1/44C02F9/02C02F9/04
Inventor 张国俊单玲珑范红玮郭红霞纪树兰
Owner BEIJING UNIV OF TECH
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