Silver and lanthanum ion water purification composite ceramic membrane process

A technology of composite ceramic membrane and lanthanum ions, which is applied in the direction of ceramic products, membrane technology, water pollutants, etc., can solve the problems of insufficient application of water purification, achieve the effect of reducing toxicity and optimizing the preparation process

Active Publication Date: 2021-10-26
江西嘉陶无机材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, more research on ceramic membranes is mainly focused on gas separation, industrial wastewater treatment, membrane material preparation, etc., and its application in water purification is relatively insufficient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A silver, lanthanum ion water purification composite ceramic membrane process, comprising the steps of:

[0017] Step 1, configure concentrated sodium hydroxide solution, in the described concentrated sodium hydroxide solution, the concentration of sodium hydroxide is 8mol / L, all the other are water; According to the ratio of mixing ratio titanium dioxide / concentrated sodium hydroxide solution=0.3g / 100mL Mix titanium dioxide powder and concentrated sodium hydroxide solution to obtain a mixture, stir the mixture at a speed of 80r / min for 10min, then quickly pour it into a hydrothermal reaction kettle, seal the kettle body, heat it to 190±10°C and keep it for 70h, and the heat preservation is over Then air-cool to normal temperature, then open the kettle body, let the mixture stand, remove the supernatant liquid, wash the white precipitate in the lower layer with deionized water until the washed liquid is neutral, and dry it at 80°C to obtain sodium trititanate powder;

...

Embodiment 2

[0022] A silver, lanthanum ion water purification composite ceramic membrane process, comprising the steps of:

[0023] Step 1, configure concentrated sodium hydroxide solution, in the described concentrated sodium hydroxide solution, the concentration of sodium hydroxide is 9mol / L, all the other are water; According to the ratio of mixing ratio titanium dioxide / concentrated sodium hydroxide solution=0.4g / 100mL Mix titanium dioxide powder and concentrated sodium hydroxide solution to obtain a mixture, stir the mixture at a speed of 80r / min for 10min, then quickly pour it into a hydrothermal reaction kettle, seal the kettle body, heat it to 190±10°C and keep it for 70h, and the heat preservation is over Then air-cool to normal temperature, then open the kettle body, let the mixture stand, remove the supernatant liquid, wash the white precipitate in the lower layer with deionized water until the washed liquid is neutral, and dry it at 80°C to obtain sodium trititanate powder;

...

Embodiment 3

[0028] A silver, lanthanum ion water purification composite ceramic membrane process, comprising the steps of:

[0029] Step 1, configure concentrated sodium hydroxide solution, in the described concentrated sodium hydroxide solution, the concentration of sodium hydroxide is 9mol / L, all the other are water; According to the ratio of mixing ratio titanium dioxide / concentrated sodium hydroxide solution=0.5g / 100mL Mix titanium dioxide powder and concentrated sodium hydroxide solution to obtain a mixture, stir the mixture at a speed of 80r / min for 10min, then quickly pour it into a hydrothermal reaction kettle, seal the kettle body, heat it to 190±10°C and keep it for 70h, and the heat preservation is over Then air-cool to normal temperature, then open the kettle body, let the mixture stand, remove the supernatant liquid, wash the white precipitate in the lower layer with deionized water until the washed liquid is neutral, and dry it at 80°C to obtain sodium trititanate powder;

...

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Abstract

The invention discloses a silver and lanthanum ion water purification composite ceramic membrane process. The process comprises the following steps: step 1, reacting titanium dioxide powder with a concentrated sodium hydroxide solution to obtain sodium trititanate powder; step 2, soaking the sodium trititanate powder in a mixed aqueous solution of cerium trichloride and iridium trichloride, and then conducting calcining to obtain solid-phase powder A; step 3, pressing the solid-phase powder A into a sheet sample, and conducting calcining to obtain a ceramic sheet B; and step 4, putting the ceramic sheet B into a dopamine aqueous solution, then putting the dopamine aqueous solution into a vacuum box, vacuumizing the box, then taking out the ceramic sheet, putting the ceramic sheet into a Tris buffer solution, soaking the ceramic sheet for 18-20 hours, then taking out the ceramic sheet, washing the ceramic sheet with deionized water, and drying the ceramic sheet to obtain the composite ceramic membrane. The preparation technology of the ceramic membrane is optimized, the prepared ceramic membrane can intercept a large number of free silver ions and lanthanum ions in sewage, recycling of metal ions in wastewater is facilitated, and the toxicity of the sewage can be reduced.

Description

technical field [0001] The invention relates to the technical field of new energy materials, in particular to a composite ceramic membrane technology of silver and lanthanum ions for water purification. Background technique [0002] Ceramic membrane (Ceramic Membrane) is a kind of inorganic membrane, which is based on inorganic ceramic materials such as alumina (Al 2 o 3 ), titanium dioxide (TiO 2 ), zirconia (ZrO 2 ) or silicon dioxide (SiO 2 ) etc. are formed by surface coating, high temperature sintering, extrusion molding and other processes. The use of inorganic ceramic membranes originated from the gas separation technology in the 20th century. However, with the improvement of process technology and the gradual decline of production costs, research on ceramic membranes has been carried out in more and more fields. Especially because of its high mechanical strength and high chemical stability, it has many application potentials that can be explored in modern indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D67/00C02F1/44C04B35/462C04B35/50C04B35/622C04B38/04C02F101/20
CPCB01D71/024B01D71/025B01D71/027B01D69/12B01D67/0039C02F1/44C04B38/04C04B35/462C04B35/50C04B35/622C04B2235/3234C04B2235/3229C04B2235/3224C02F2101/20
Inventor 程春明杨涛黄浩程言淇
Owner 江西嘉陶无机材料有限公司
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