Defluorination absorbing material based on aluminum base composite oxides and its preparation method and use and special device of the preparation method

An aluminum-based composite, adsorption material technology, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as limitations

Active Publication Date: 2009-08-19
清华苏州环境创新研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above operation process greatly limits the application of artificially synthesized fluorine removal adsorption materials and fluorine removal technology in engineering practice

Method used

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  • Defluorination absorbing material based on aluminum base composite oxides and its preparation method and use and special device of the preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] See figure 1 . The columnar water purification reactor based on the aluminum-based composite oxide fluorine removal material prepared by the in-situ preparation method has a water inlet 1 on the top, and a water distributor 4 at the water inlet in the columnar water purification reactor. There is a support layer 5 in the lower part of the device, a porous load matrix material 6 is arranged on the support layer, and a water distributor 4 is arranged under the support layer; a water outlet is opened at the bottom of the columnar water purification reactor below the water distributor 2 and the inlet 6 of aluminum salt solution and inorganic alkali solution. The diameter of the reactor is 1 m, the effective height is 1.8 m, and the filling height of the porous supporting matrix material 6 is 1.5 m.

[0063] Material preparation: use diatomite with a particle size range of 0.2mm to 0.4mm as the porous loading matrix, and fill it into a columnar water purification reactor; ...

Embodiment 2

[0067] The water purification reactor is the same as in Example 1.

[0068]Material preparation: Anthracite with a particle size range of 0.5 mm to 1.0 mm is used as a porous loading matrix, which is filled into a columnar water purification reactor; 20 g / L polyaluminum chloride (PAC) solution and 8 g / L NaOH are prepared respectively solution; use a pump to pump the NaOH solution into the above-mentioned water purification reactor until the anthracite is immersed and stop pumping the NaOH solution. After 30 minutes of immersion, the NaOH solution will be released through the water outlet; then pump the PAC solution into the above water purification reaction Stop pumping the PAC solution until the anthracite is submerged, let the PAC solution flow out through the water outlet after immersion for 10 minutes; let the PAC solution stand for 20 minutes intermittently, repeat the above method twice, and let the PAC solution stand for 20 minutes between each time. The aluminum-based ...

Embodiment 3

[0072] The water purification reactor is the same as in Example 1.

[0073] Material preparation: use quartz sand with a particle size range of 0.8 mm to 2.0 mm as the porous loading matrix, and fill it into a columnar water purification reactor; prepare Al 2 (SO 4 ) 3 with FeCl 3 mixed solution (wherein Al 2 (SO 4 ) 3 The concentration is 20g / L, FeCl 3 The concentration is 5g / L) and 10g / L NaOH solution; pump the NaOH solution into the above-mentioned water purification reactor until the quartz sand is submerged and stop pumping the NaOH solution, and after immersion for 30 minutes, pass the NaOH solution through the water outlet released; then Al 2 (SO 4 ) 3 with FeCl 3 pump the mixed solution into the above-mentioned water purification reactor until the quartz sand is submerged and stop pumping into the Al 2 (SO 4 ) 3 with FeCl 3 The mixed solution, soaked for 10 minutes to make Al 2 (SO 4 ) 3 with FeCl 3 The mixed solution flows out through the water outle...

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Abstract

The invention belongs to the field of materials for removing fluorine in water, and in particular relates to a fluorine-removal adsorption material based on alanate and aluminum-based composite oxide, a preparation method and uses of the same, and a special device for the preparation method. The fluorine-removal adsorption material based on the aluminum-based composite oxide, which is prepared by a heterotopic preparation method or an in-situ preparation method, comprises two parts of an active composition and a porous supported substrate, wherein the active composition is the aluminum-based composite oxide prepared from an aluminum salt solution and an inorganic alkaline solution by chemical reaction; and the aluminum-based composite oxide is loaded on the surface of the porous supported substrate by an in-situ loading method, and the mass ratio of the aluminum-based composite oxide to the porous supported substrate is 0.25-25:100. The fluorine-removal adsorption material based on the aluminum-based composite oxide can be used for the adsorption of fluorine pollutants in the water and particularly common fluorine in underground drinking water sources. In addition, the material can also be used for removing pollutants such as arsenic, iron, manganese, phosphate, and the like in the water.

Description

technical field [0001] The invention belongs to the field of materials for removing fluorine in water, and in particular relates to an aluminum-based composite oxide-based fluorine removal adsorption material based on aluminum oxide, a preparation method and application, and a special device suitable for the in-situ preparation method. Background technique [0002] Fluorine widely exists in the groundwater environment, and mainly originates from the leaching and release of fluorine in rocks, minerals and soil during natural geochemical processes. Fluorine pollution in groundwater is relatively common in my country. Except for Shanghai, drinking-water fluorosis that uses groundwater as a water source has been found in other provinces, autonomous regions and municipalities directly under the Central Government. Investigations have found that people who drink well water with a fluoride ion concentration of about 2.0mg / L for a long time have a probability of suffering from mild ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08
Inventor 曲久辉王洪杰刘锐平刘会娟兰华春
Owner 清华苏州环境创新研究院
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