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A titanium-aluminum composite sphere adsorbent for drinking water purification

An adsorbent and drinking water technology, applied in the direction of adsorption of water/sewage treatment, water pollutants, other chemical processes, etc., can solve the problems of poor arsenic and fluorine co-removal effect, and achieve good removal effect

Inactive Publication Date: 2017-12-29
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used arsenic and fluorine adsorbents have a common disadvantage: they have a strong ability to treat single arsenic or single fluorine, and the removal effect of arsenic and fluorine is not good.

Method used

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  • A titanium-aluminum composite sphere adsorbent for drinking water purification
  • A titanium-aluminum composite sphere adsorbent for drinking water purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A reactor with a volume of 10 L was placed in an ice water environment, 2000 mL of deionized water was added, and the water temperature was 5°C. Under vigorous stirring, 300 g of titanyl sulfate was slowly added into deionized water. While continuing to stir, use a constant flow pump to add dropwise a sodium hydroxide solution with a concentration of 10 mol / L at a rate of 10 mL / min to adjust the pH to 7.5. The above solution was washed several times with deionized water until the conductivity dropped to 19 μs, and the metatitanic acid slurry was obtained after removing the supernatant. The metatitanic acid slurry was placed in a 50 mL centrifuge tube and centrifuged at 10,000 rpm for 5 minutes to obtain 810 g of metatitanic acid filter cake. Add 400mL of deionized water and 200mL of pre-prepared alumina seed solution (seed crystal solid content 4%) into a 2L reaction beaker, heat to 80-85°C and add aluminum sulfate solution 1000mL (alumina content 51g / L) and sodium a...

Embodiment 2

[0031] Take 196g of metatitanic acid filter cake and 35g of pseudo-boehmite filter cake (titanium-aluminum molar ratio 1.7:1), add 31mL of 5% dilute nitric acid, beat evenly for 20min, put it in a high-pressure reactor, seal it and fill it with nitrogen Pressurize to 1MPa, heat to 200°C and react for 2 hours, then cool to below 100°C, and reduce the pressure to zero. After cooling the reactant, titanium aluminum sol is obtained. Thereafter, 4.7 mL of 50% hexamethylenetetramine was added, mixed and centrifuged at 10,000 rpm for 5 minutes. The finally obtained centrifugal precipitate is subjected to rolling ball method to obtain titanium-aluminum spheres with a particle diameter of 1.2-2 mm. The titanium aluminum balls were calcined in a muffle furnace at 600°C for 2 hours, cooled, washed with water, and treated with hot water steam (125°C) for 30 minutes. Drying treatment with hot air (100° C.) for 2 hours obtained 102 g of titanium-aluminum composite sphere adsorbent.

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Abstract

In the invention, titanyl sulfate is dissolved, pH is adjusted and washed, aluminum sulfate and sodium aluminate solutions flow in parallel, pH is adjusted and washed to obtain metatitanic acid and pseudoboehmite filter cake. After the above filter cake is mixed, pressurized, heated and acidified, a solidifying agent is added to form a ball, and treated with steam to finally obtain a titanium-aluminum composite spherical adsorbent. The adsorption experiment proves that the adsorbent has strong adsorption capacity for arsenic and fluorine in groundwater, and can be used for the treatment and purification of high-arsenic and fluorine groundwater in vast rural areas.

Description

1. Technical field [0001] The invention relates to a preparation method of a titanium-aluminum composite sphere adsorbent used for co-removing arsenic and fluorine in drinking water. The prepared titanium-aluminum composite sphere adsorbent can remove toxic substances such as arsenic and fluorine in groundwater, and can be directly used for drinking water purification, belonging to the technical field of water treatment. 2. Background technology [0002] Drinking water safety is closely related to human health. With the increasingly serious environmental pollution, the pollution and poisoning of arsenic and fluorine in groundwater has become a worldwide problem, and arsenic pollution is especially serious in some areas. At present, arsenic and fluorine pollution occurs in a large area in more than a dozen countries in the world, and China is one of them. High-arsenic water and high-fluorine water have been threatening the safety of drinking water for some rural residents i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/30C02F1/28C02F101/20C02F101/14
Inventor 景传勇
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI