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High performance agent for removing fluorin, preparation method, and application

A defluoridation agent and high-efficiency technology, applied in the field of high-efficiency defluoridation agent and its preparation and application, can solve problems such as troublesome procedures, inconvenient use, secondary pollution of groundwater, etc., and achieve low investment in production equipment, simple production process, and high exchange capacity big effect

Inactive Publication Date: 2007-12-26
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These defluorination agents and defluorination technologies currently used still have some imperfections, such as high cost and inconvenient use.
Moreover, in the process of recycling most of the defluorinating agents, there are problems of troublesome procedures, time-consuming and labor-intensive procedures, and it is difficult for the masses to persist
In addition, the high-fluorine liquid produced during regeneration may also cause secondary pollution of groundwater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0040] Mix brick red soil with appropriate amount of water, stir evenly, and press it into strips with a diameter of 2mm and a length of 2-10mm with an extrusion device. After drying, heat it in a muffle furnace at a heating temperature of 100-900°C for a heating time of 20 minutes.

[0041] The fluoride ion adsorption capacity test was carried out with the fluoride removal agent made in Examples 1-10, and the results are shown in Table 2.

[0042] Table 2 The effect of heating and adsorbing fluorine in brick red soil at different temperatures

[0043] Example

Heating temperature / ℃

Fluoride ion adsorption rate / %

1

2

3

4

5

6

7

8

9

10

100

150

200

250

300

400

500

600

700

900

88

87.7

65.2

61.8

33.9

34.8

34

31

24.9

7.8

[0044] It can be seen from the data in Table 2 that ...

Embodiment 11-18

[0047] Use brick red soil, add appropriate amount of water, stir evenly, extrude a cylinder with a diameter of 2mm and a length of 2-10mm with an extrusion device, after drying at room temperature, heat at 100°C or 150°C for 30min, 40min, 50min, 60min respectively.

[0048] The fluoride removal agents obtained in Examples 11-18 were subjected to a fluoride ion adsorption capacity test, and the results are shown in Table 3. It can be seen from Table 3 that the heating time of 20-60 min has little effect on the effect of adsorbing fluorine.

[0049] Table 3 The effect of fluorine adsorption on brick red soil with different heating time

[0050] Example

Embodiment 19-25

[0052]Use 30g of brick red soil, add 6g of aluminum sulfate; add an appropriate amount of water, stir evenly, press out a cylinder with a diameter of 2mm and a length of 2-10mm with an extrusion device, dry at room temperature, and dry at 100°C, 150°C, 200°C, Heat treatment at 250°C, 275°C, 300°C, 350°C for 20 minutes.

[0053] The fluoride-removing agents obtained in Examples 19-25 were subjected to a fluoride ion adsorption capacity test, and the results are shown in Table 4.

[0054] Table 4 The influence of heating temperature on the adsorption effect of defluorinating agent

[0055] Example

[0056] It can be seen from the results in Table 4 that the fluoride removal effect of brick red soil with aluminum sulfate is significantly higher than that without aluminum sulfate, and with the increase of heating temperature, the fluoride ion adsorption rate does not decrease.

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Abstract

The invention relates to a fluorine-removing agent with high efficiency and its preparation method and application. The invention includes the raw material agitation, the formation and the roasting which contains laterite, the aluminum salt, of which the weight dosage of the aluminum salt is 0-30% according to the gross weight of the raw material, the fluorine-removing agent can widely used in the profession of the fluorine sewage treatment, the high fluorine surface water purification. The invention is simple craft, and operation.

Description

technical field [0001] The invention relates to a high-efficiency defluorinating agent and its preparation method and application. Background technique [0002] my country is the country with the most serious endemic fluorosis. Endemic fluorosis is a major endemic disease that seriously endangers the health of rural people in our country. It is an endemic disease that our government focused on controlling in the first 10 years of this century. [0003] Endemic fluorosis is mainly drinking-water fluorosis. Foreign studies on drinking-water fluorosis mostly focus on changing water sources and chemical agents to remove fluoride. There are also studies on using soil as an adsorbent to eliminate fluorine pollution in water. For example, the American Salt Laboratory C.A. Bower and J.N.Matcher (Soil Science, 1967, 103 (3): 151-154) used five kinds of alkaline soil and acidic soil to do the adsorption test of fluorine respectively, in order to study the possibility of preventing flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12C02F1/28
Inventor 王五一冯福建虞江萍杨林生李海蓉李永华
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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