Anti-pollution hollow fiber membrane with heavy metal ion and organic dye removing function

A technology of heavy metal ions and organic dyes, applied in water pollutants, fiber treatment, alkali metal compounds, etc., to achieve the effect of high packing density, good pressure resistance, and good adsorption of heavy metal ions.

Inactive Publication Date: 2018-01-26
TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, a PVDF anti-pollution hollow fiber separation membrane with the function of removing heavy metal ions and organic dyes has not been reported, and it is a difficult problem to improve the removal efficiency of heavy metal ions and the photocatalytic degradation efficiency of the membrane.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of GO: In an ice-water bath, slowly add 200mL of concentrated sulfuric acid to a 1L three-neck flask, then add 10g of graphite and 3g of sodium nitrate in sequence, the addition process must be slow, and the graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1 h, then slowly add 25 g of potassium permanganate, and mechanically stir it in an ice-water bath for 1.5 h. Then raise the temperature to 30°C, react for 2 hours, then slowly add 200mL of 30°C deionized water, then raise the temperature of the reaction system to 80°C and stir for 10min, then slowly add 400mL of deionized water into the system, stir for 2min, then add 20mL of peroxide Hydrogen terminated the reaction, and the reactants were stirred for 10 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtained.

[0034] (2) Pre...

Embodiment 2

[0041] (1) Preparation of GO: In an ice-water bath, slowly add 250mL of concentrated sulfuric acid to a 1L three-necked flask, and then add 15g of graphite and 5g of sodium nitrate in sequence. The addition process must be slow, and graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1.5h, then slowly add 35g of potassium permanganate, and mechanically stir it in an ice-water bath for 2h. Then raise the temperature to 40°C, react for 2.5 hours, then slowly add 250mL of 40°C deionized water, then raise the temperature of the reaction system to 90°C and stir for 20min, then slowly add 500mL of deionized water into the system, stir for 2min, then add 25mL of deionized water Hydrogen oxidation terminated the reaction, and the reactant continued to stir for 20 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtai...

Embodiment 3

[0049] (1) Preparation of GO: In an ice-water bath, slowly add 200mL of concentrated sulfuric acid to a 1L three-neck flask, then add 15g of graphite and 5g of sodium nitrate in sequence. The addition process must be slow, and graphite and sodium nitrate have been repeatedly ground before adding , After stirring for 1.5h, then slowly add 25g of potassium permanganate, and mechanically stir it in an ice-water bath for 2h. Then raise the temperature to 30°C, react for 2 hours, then slowly add 250mL of 30°C deionized water, then raise the temperature of the reaction system to 80°C and stir for 10min, then slowly add 500mL of deionized water into the system, stir for 2min, then add 25mL of peroxide Hydrogen terminated the reaction, and the reactants were stirred for 20 minutes, then centrifuged, and washed repeatedly with dilute hydrochloric acid and deionized water until the pH of the product was 7, and the desired GO of the present invention was obtained.

[0050] (2) Pretreatme...

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Abstract

The invention discloses a preparation method of an anti-pollution hollow PVDF (polyvinylidene fluoride) fiber membrane with an efficient heavy metal ion and organic dye removing function, and belongsto the field of high polymer materials. A product of the hollow fiber membrane is characterized in that heavy metal ions such as nickel, chromium, lead and the like in water can be adsorbed and removed, organic dyes such as bright blue, methylene blue and the like can be simultaneously adsorbed and removed, removal efficiency of the heavy metal ions and organic dyes in water is high, and the product has anti-pollution property to protein and microorganisms in water. According to the product of the hollow fiber membrane, the adsorption removal rate for low-concentration chromium ions reaches 90% or higher, and the methylene blue removal rate under the action of natural light reaches 90% or higher. Static protein adsorption tests show that adsorption of protein by the fiber membrane is reduced by 80% when compared with that by unmodified membranes. The product has the advantages that pressure resistance is good, a support body is not needed, the membrane area per unit volume and the fluxare large and the like; besides, special equipment is not required for preparation, industrial implementation is facilitated, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a method for preparing an anti-pollution hollow fiber separation membrane that has good adsorption and removal functions for nickel, chromium, lead and other heavy metal ions and simultaneously has good removal functions for organic dyes such as brilliant blue and methylene blue. The hollow fiber separation membrane can not only effectively remove heavy metal ions such as nickel, chromium, lead, and mercury in water, but also can remove organic dyes such as brilliant blue and methylene blue through photocatalytic degradation. The removal efficiency of organic dyes is high, and it can be applied to the sewage treatment fields such as electroplating industry and chemical industry. Background technique [0002] In recent years, water pollution caused by industrial wastewater has been serious, especially the problem of heavy metal ion pollution in water is very prominent. When treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/08B01D67/00B01J20/26B01J20/28B01J31/06C02F1/28C02F1/30B01J20/30D06M14/10D06M13/148D06M11/38D01F6/48D01F1/10C02F101/20C02F101/30C02F103/16
Inventor 赵义平张东东张筱烨李焕焕孙丽赵国部
Owner TIANJIN JINLIN WATER TREATMENT SCI & TECH CO LTD
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