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Nano diatom composite water purifying agent and preparation method thereof

A technology of nano diatoms and water purifiers, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of adsorption site occupation, limitation of diatomite adsorption capacity, and obstacles

Pending Publication Date: 2020-04-21
江苏成博环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Part of the micropores on the surface of diatomite raw soil is covered by impurities, the adsorption sites are occupied, and the ions in the solution are hindered from entering the pores of diatomite, which limits the adsorption capacity of diatomite to a certain extent.

Method used

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  • Nano diatom composite water purifying agent and preparation method thereof
  • Nano diatom composite water purifying agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] A preparation method of nano-diatom composite water purifying agent, comprising the following steps:

[0023] (1) Mechanically grind the natural diatom mineral powder and pass it through a sieve of 80-100 mesh, and roast the diatomite obtained after passing the sieve at a temperature of 650°C for 80 minutes, and then cool it to room temperature;

[0024] (2) Prepare the diatomite obtained in step (1) according to the ratio of adding 5 mL of nitric acid solution with a concentration of 0.6 mol / L per gram of diatomite, and configure as required, put the above solution in a suitable container and put In a constant temperature water bath oscillator, the temperature of the water bath is 40°C, and the shaking time is 1.5h. After the end, filter, wash the filter residue with deionized water until it is neutral, dry it in vacuum at 85°C for 6-8h, and then cool to room temperature. The obtained diatomite is mechanically ground again, and passed through an 80-mesh sieve to obtain...

Embodiment 2

[0027] In order to screen out the optimal calcination temperature and time of diatomite, the effects of different calcination temperatures and time treatments on the specific surface area and water purification capacity of diatomite were explored.

[0028] Firstly, the calcination temperature and calcination time were screened by orthogonal test, and the specific surface area of ​​untreated natural diatomite was compared. Under the calcination temperature and time conditions of each group, 20g of natural diatomite was taken for treatment, washed with deionized water, then vacuum-dried at 80°C for 6 hours and then cooled to room temperature, and the ratio of diatomite after each group of treatment was measured. surface area. The results are shown in Table 1.

[0029] Table 1 Effects of different calcination temperatures and times on the specific surface area of ​​diatomite

[0030]

[0031] The specific surface area of ​​untreated natural diatomaceous earth is 16.56 m 2 / ...

Embodiment 3

[0037]In order to screen out the optimal concentration of nitric acid solution, the effects of different concentrations of nitric acid solution treatment on the specific surface area and water purification capacity of diatomite were explored.

[0038] The natural diatomaceous earth was divided into 5 groups, numbered 1-5 groups, 1-5 groups were natural group, roasted group, low-concentration acid treatment group (0.2 mol / L), medium-concentration acid treatment group (0.4 mol / L) / L), high-concentration acid treatment group (0.6 mol / L). Among them, groups 2-4 of diatomite were roasted at 650°C for 80 minutes, and groups 3-5 were acid-leached in nitric acid solutions with concentrations of 0.2 mol / L, 0.4 mol / L, and 0.6 mol / L, respectively. . The treatment method is: add 5 mL of nitric acid solution with a concentration of 0.6 mol / L per gram of diatomaceous earth, configure according to the needs, put the above solution in a suitable container and put it in a constant temperature...

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Abstract

The invention provides a nano diatom water purifying agent and a preparation method thereof. The nano diatom water purifying agent provided by the invention is mainly prepared by mixing diatomite andaluminum-containing and iron-containing minerals. According to the invention, two modification means of roasting and acid leaching are carried out on a natural diatom ore product, so that the pore size, the specific surface area and the adsorption capacity of the diatomite are increased; and by adding the nano diatom composite water purifying agent in a sewage treatment process, ultrafine particlesubstances are adsorbed to the surface of the diatomite by using the huge specific surface area and the strong adsorption force of the diatomite, and the flocculation effect is combined, such that the pollution in sewage can be rapidly flocculated and precipitated so as to substantially improve pollutants, inorganic substances and the like and improve the biodegradability of the sewage.

Description

technical field [0001] The invention relates to a nano-diatom composite water purifier, in particular to a nano-diatom composite water purifier and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the increasing development and utilization of resources by human beings and the rapid development of industry and agriculture, urban and rural areas have produced a large amount of surface water pollution, and the problem of amber eutrophication is prominent; groundwater is polluted not only by point or surface The use function of water bodies has been reduced, and the contradiction between supply and demand of water resources has been exacerbated; the trend of ecological damage has not been effectively controlled. Severe water pollution not only reduces the use function of water bodies, but also exacerbates the contradiction of water resource shortage, which has a serious negative impact on the sustainable development ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/52B01J20/14B01J20/28B01J20/30
CPCB01J20/14B01J20/28059C02F1/281C02F1/5236
Inventor 陈玉良邵燕平
Owner 江苏成博环保科技有限公司
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