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A kind of preparation method of natural mineral load type nanometer defluoride agent

A natural mineral and load-bearing technology, applied in the direction of chemical instruments and methods, silicon compounds, silicates, etc., can solve the problems of nano-material reunion and deactivation, secondary pollution of water bodies, etc., to avoid secondary pollution, prevent reunion, cost reduction effect

Active Publication Date: 2016-07-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the object of the present invention is to provide a preparation method of a natural mineral-supported nano-fluoride removal agent, which effectively improves the adsorption capacity of fluorine in water, and simultaneously avoids the agglomeration and deactivation of nano-materials and the The problem of secondary pollution of water bodies

Method used

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  • A kind of preparation method of natural mineral load type nanometer defluoride agent
  • A kind of preparation method of natural mineral load type nanometer defluoride agent
  • A kind of preparation method of natural mineral load type nanometer defluoride agent

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Embodiment 1

[0042] (1) High-temperature activation treatment: 100 g of natural zeolite with a particle size of 1 mm was treated at a high temperature of 700 ° C for 8 hours;

[0043] (2) Acid activation treatment: add the zeolite after high temperature activation treatment to 200ml of 7% hydrochloric acid solution for acid activation treatment for 20 hours, then wash until the pH value is 6.5, then filter and dry;

[0044] (3) Alkali activation treatment: add the dried zeolite in (2) to 200ml of 10% sodium hydroxide solution for alkali activation treatment for 24 hours; then wash until the pH value is 7.5, then filter and dry;

[0045] (4) Metal salt reaction: add the dried zeolite in (3) to 150ml of aluminum chloride solution with a concentration of 4mol / L and react for 18 hours; then adjust the pH value of the solution to 5.5, then wash, filter, ℃ drying for 4.5 hours to obtain a natural mineral-supported nano-fluoride removal agent.

[0046] The scanning electron microscope picture of...

Embodiment 2

[0051] (1) High-temperature activation treatment: 100 g of natural zeolite with a particle size of 1.5 mm was treated at a high temperature of 400 ° C for 20 hours;

[0052] (2) Acid activation treatment: add the zeolite after high temperature activation treatment to 250ml of 2% hydrochloric acid solution for acid activation treatment for 48 hours, then wash until the pH value is 6, then filter and dry;

[0053] (3) Alkali activation treatment: add the dried zeolite in (2) to 150ml of 15% sodium hydroxide solution for alkali activation treatment for 12 hours; then wash until the pH value is 7, then filter and dry;

[0054] (4) Metal salt reaction: add the dried zeolite in (3) to 350ml of aluminum sulfate solution with a concentration of 0.3mol / L and react for 48 hours; then adjust the pH value of the solution to 6, then wash, filter, ℃ drying for 1 hour to obtain a natural mineral-loaded nano-fluoride removal agent.

Embodiment 3

[0056] (1) High-temperature activation treatment: 100 g of natural zeolite with a particle size of 3 mm was treated at a high temperature of 1000 ° C for 3 hours;

[0057] (2) Acid activation treatment: Add the zeolite after high temperature activation treatment to 100ml of 15% sulfuric acid solution for acid activation treatment for 6 hours, then wash until the pH value is 6.2, then filter and dry;

[0058] (3) Alkali activation treatment: add the dried zeolite in (2) to 100ml of 18% potassium hydroxide solution for alkali activation treatment for 12 hours; then wash until the pH value is 7, then filter and dry;

[0059] (4) Metal salt reaction: Add the dried zeolite in (3) to 105ml of aluminum nitrate solution with a concentration of 5mol / L and react for 12 hours; then adjust the pH value of the solution to 6, then wash, filter, and store Dry for 10 hours to obtain a natural mineral-loaded nano-fluoride removal agent.

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Abstract

The invention discloses a preparation method of a natural mineral-supported nanometer defluoridation agent. The method comprises high-temperature activation treatment, acid activation treatment, alkali activation treatment and metal salt reaction. Due to the strong mechanical strength of natural zeolite, its interior is full of tiny holes and channels. Using it as the carrier of nano-fluorine removal materials can effectively fix nano-materials in its internal channels under the condition of water flow. Thereby avoiding the agglomeration and loss of nanomaterials, improving its ability to absorb fluorine, and can be regenerated and reused, reducing the cost of fluorine removal. The defluoridation agent of the present invention has a larger specific surface area, can provide more active sites to realize high adsorption capacity for fluorine, and can be widely used in high-fluorine surface water, groundwater purification treatment, fluorine-containing sewage treatment and the like.

Description

Background technique [0001] Fluorine is one of the essential trace elements for the human body, but when the daily intake of fluorine is too high, it will lead to endemic fluorosis. Drinking high-fluoride water for a long time will lead to fluorosis, dental fluorosis and bone fluorosis. In mild cases, it will cause tooth deterioration and loss, and in severe cases, it will cause bone sclerosis or osteoporosis, and even paralysis, resulting in loss of work ability. According to the survey of the Ministry of Health, endemic fluorosis is widely distributed in my country, and endemic fluorosis exists in most provinces. Therefore, effective control and removal of fluorine in water is an important issue related to the environment and human health. [0002] Endemic fluorosis in my country is mainly divided into three types: one is drinking water type fluorosis, which is the most widely distributed type with the largest number of patients, and is mainly distributed in the vast areas ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28C02F1/58
Inventor 孙柏孔令涛贾勇遇鑫遥金震罗涛刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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