Heavy-metal-ion adsorption type anti-pollution hybrid flat-sheet separation membrane and preparation method thereof

A technology for adsorbing heavy metals and anti-pollution, which is applied in the fields of alkali metal compounds, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve pollution and other problems, and achieve good adsorption of heavy metal ions and anti-protein and microbial pollution effects.

Inactive Publication Date: 2016-04-06
TIANJIN CNCLEAR ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its strong hydrophobic properties, it is very easy to adsorb proteins and microorganisms in water bodies in biochemistry, industrial wastewater, domestic sewage treatment, etc., resulting in serious pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Pretreatment of attapulgite. Weigh 10g of attapulgite with a particle size of 300 mesh, wash with 1L of distilled water, take its supernatant after precipitation, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, and then continue to centrifuge at 500rpm for 1min. Then take its supernatant, wash the supernatant repeatedly like this for 3 times, and finally carry out centrifugation with 4000rpm, take its precipitate, vacuum dry at 90°C for 24 hours, and select a sieve with the corresponding mesh size according to the particle size after grinding to sieve. Purified attapulgite was obtained.

[0030] Prepare a hydrochloric acid solution with a concentration of 0.5mol / L, add 10g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 70°C, stir for 1h, then oscillate ultrasonically for 30min, and filter with suction. ...

Embodiment 2

[0036] (1) Pretreatment of attapulgite. Weigh 10g of attapulgite with a particle size of 300 mesh, wash with 1L of distilled water, take its supernatant after precipitation, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, and then continue to centrifuge at 500rpm for 1min. Then take its supernatant, wash the supernatant repeatedly like this for 3 times, and finally carry out centrifugation with 4000rpm, take its precipitate, vacuum dry at 90°C for 24 hours, and select a sieve with the corresponding mesh size according to the particle size after grinding to sieve. Purified attapulgite was obtained.

[0037] Prepare a hydrochloric acid solution with a concentration of 0.5mol / L, add 10g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 70°C, stir for 1h, then oscillate ultrasonically for 30min, and filter with suction. ...

Embodiment 3

[0043] (1) Pretreatment of attapulgite. Weigh 10g of attapulgite with a particle size of 300 mesh, wash with 1L of distilled water, take its supernatant after precipitation, centrifuge at 500rpm for 1min, take its supernatant, add a small amount of distilled water to the supernatant and mix evenly, and then continue to centrifuge at 500rpm for 1min. Then take its supernatant, wash the supernatant repeatedly like this for 3 times, and finally carry out centrifugation with 4000rpm, take its precipitate, vacuum dry at 90°C for 24 hours, and select a sieve with the corresponding mesh size according to the particle size after grinding to sieve. Purified attapulgite was obtained.

[0044] Prepare a hydrochloric acid solution with a concentration of 0.5mol / L, add 10g of purified attapulgite and 150mL of hydrochloric acid solution into a small beaker and stir and mix. After 5min, heat the mixture to 70°C, stir for 1h, then oscillate ultrasonically for 30min, and filter with suction. ...

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PUM

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Abstract

The invention discloses a polyvinylidene fluoride/attapulgite hybrid separation membrane with good adsorption function to heavy metal ions and anti-pollution performance to protein and microorganisms in a water body, and a preparation method thereof, belonging to the technical field of functional polymeric membranes. The heavy-metal-ion adsorption type anti-pollution hybrid flat-sheet separation membrane is prepared by constructing a zwitter-ion MPDSAH gel layer on the surface of a membrane through grafting and crosslinking with a PVDF/attapulgite hybrid membrane as a base membrane, wherein the membrane is best in performances when a mass ratio of PVDF and modified attapulgite in the base membrane is 1: 0.3, the mass of the base membrane is 1.08945 g, the usage amount of a surface grafting monomer MPDSAH is 7.0 g, the content of a crosslinking agent MBAA accounts for 0.6% of the total content of the monomer, the usage amount of an initiator is 0.078 g, membrane alkali treatment time is 20 min, and a reaction temperature is 60 DEG C. The preparation method for the heavy-metal-ion adsorption type anti-pollution hybrid flat-sheet separation membrane provided by the invention has the advantages of no need of special equipment, easy industrial implementation, simple process and low membrane cost.

Description

technical field [0001] The invention relates to an anti-pollution separation membrane and a preparation method thereof, in particular to a polymer with good adsorption function for heavy metal ions such as mercury, copper, nickel, chromium and lead, and anti-pollution for proteins and microorganisms in water bodies. A vinylidene fluoride / attapulgite hybrid separation membrane and a preparation method thereof belong to the technical field of functional polymer membranes. Background technique [0002] In recent years, the pollution of wastewater containing heavy metal ions such as lead, copper, cadmium, chromium, and mercury in the chemical and metallurgical industries is becoming increasingly serious. Heavy metal ion pollution has become a serious social and environmental problem, and it is an urgent need to solve economic development and environmental issues. Key issues in terms of health and drinking water safety. [0003] When treating industrial wastewater containing h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/06B01D67/00B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 石月荣赵义平陈莉申向冯霞张桂芳
Owner TIANJIN CNCLEAR ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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