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Antibacterial diatomite-purple sand compound filter ceramic and preparation method thereof

A compound filtration and diatomite technology, applied in the field of antibacterial ceramics, can solve the problems of high cost, large initial release, and limited duration, and achieve good antibacterial effects, short production cycle, and low raw material consumption

Inactive Publication Date: 2015-04-08
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of antibacterial filter ceramics, the existing technology only reflects the release of silver ions on the surface of the material, which may start to release a large amount, but the duration is limited, and the use of coupling agents and strong alkalis may cause pollution to the subsequent use of materials
In the prior art CN102936141 A, metal silver powder is doped into ceramic raw materials, and then sintered to obtain antibacterial ceramics. The uniformity of silver ion distribution in ceramics cannot be guaranteed in this type of process, and the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Soak 100 g of diatomite in 0.1 mol / L silver nitrate solution, stir for 2 hours, vacuum impregnate for 2 hours, then filter and dry to obtain silver-loaded diatomite. Soak the purple sand powder in 0.1 mol / L silver nitrate solution, stir for 2 hours, vacuum impregnate for 1 hour, then filter and dry to obtain silver-loaded purple sand. According to the proportion by weight, 80% of silver-loaded diatomite, 10% of silver-loaded purple sand and 10% of hydroxypropyl methylcellulose aqueous solution are thoroughly mixed to obtain a mixture. The mixture is put into the mold, formed by compacting, and then demolded to obtain the antibacterial diatomite-purple sand composite filter ceramic green body; after the diatomite-purple sand ceramic green body is dried, it is placed in a sintering furnace for sintering, and the sintering temperature is The temperature is 1000°C, the sintering time is 6 hours, and the antibacterial diatomite-purple sand composite filter ceramics are obtai...

Embodiment 2

[0023] Soak 500 g of diatomite in 0.15 mol / L silver nitrate solution, stir for 4 hours, vacuum impregnate for 3 hours, then filter and dry to obtain silver-loaded diatomite. Soak the purple sand powder in 0.1mol / L silver nitrate solution, stir for 2 hours, vacuum impregnate for 2 hours, then filter and dry to obtain the silver-loaded purple sand. According to weight percentage, 70% of silver-loaded diatomite, 20% of silver-loaded purple sand and 10% of sodium carboxymethyl cellulose aqueous solution are thoroughly mixed to obtain a mixture. The mixture is put into the mold, formed by compacting, and then demolded to obtain the antibacterial diatomite-purple sand composite filter ceramic green body; after the diatomite-purple sand ceramic green body is dried, it is placed in a sintering furnace for sintering, and the sintering temperature is The temperature is 1100°C, the sintering time is 6 hours, and after cooling, antibacterial diatomite-purple sand composite filter ceramics...

Embodiment 3

[0025] Soak 200 g of diatomite in 0.1 mol / L silver nitrate solution, stir for 4 hours, vacuum impregnate for 2 hours, then filter and dry to obtain silver-loaded diatomite. Soak the purple sand powder in 0.05mol / L silver nitrate solution, stir for 2 hours, vacuum impregnate for 1 hour, then filter and dry to obtain the silver-loaded purple sand. According to the proportion by weight, 80% of silver-loaded diatomite, 15% of silver-loaded purple sand and 5% of sodium carboxymethyl cellulose aqueous solution are thoroughly mixed to obtain a mixture. The mixture is put into the mold, formed by compacting, and then demolded to obtain the antibacterial diatomite-purple sand composite filter ceramic green body; after the diatomite-purple sand ceramic green body is dried, it is placed in a sintering furnace for sintering, and the sintering temperature is The temperature is 1120°C, the sintering time is 6 hours, and after cooling, antibacterial diatomite-purple sand composite filter cer...

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PUM

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Abstract

The invention provides an antibacterial diatomite-purple sand compound filter ceramic and a preparation method thereof. The preparation method comprises the following steps: respectively immersing diatomite and purple sand powder in a silver nitrate solution, wherein the silver nitrate solution fully permeates through holes of diatomite and purple sand powder; then, filtering and drying; mixing in a certain proportion; adding into an adhesive aqueous solution and uniformly mixing and stirring; grouting or pressing and moulding; and drying and sintering to obtain the antibacterial diatomite-purple sand compound filter ceramic. Silver ions which are uniformly distributed inside and on the surface of the filter ceramic have an effect of continuously killing bacteria. Meanwhile, the natural pore structure of diatomite, the double porous structure and the water activating effect of purple sands and the antibacterial effect of silver are organically combined, so that bacteria, fine particle impurities and the like in water are effectively removed.

Description

technical field [0001] The invention relates to an antibacterial ceramic, in particular to an antibacterial diatomite-purple sand composite filter ceramic which can be used for drinking water treatment and a preparation method thereof. Background technique [0002] According to the World Health Organization report: There are a large number of rural and urban populations in developing countries who do not have access to safe drinking water. At present, 80% of human diseases and 30% of mortality are related to unclean drinking water. my country's fresh water resources are very scarce. In recent years, my country's drinking water sources have generally been polluted to varying degrees, such as pollution from urban domestic sewage and industrial wastewater; water pollution from solid waste and acid rain; extensive use of pesticides and fertilizers on water bodies Pollution, etc., these have exacerbated the deterioration of my country's drinking water environment. [0003] Diato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B38/08
Inventor 漆小鹏邓城
Owner JIANGXI UNIV OF SCI & TECH
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