Preparation method of granular drinking water arsenic-removing adsorption material

An adsorption material and granular technology, which is applied in the field of preparation of arsenic removal adsorption materials for drinking water, can solve the problems of poor mechanical properties of powder materials, difficult solid-liquid separation, and difficult simultaneous removal, etc., and achieves high mechanical strength, low cost, and easy The effect of solid-liquid separation

Inactive Publication Date: 2019-01-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the technical problems that conventional powdered arsenic-removing adsorption materials are difficult to simultaneously remove As(III) and As(V) in water bodies, the powder materials have poor mechanical properties, are not easy to separate solid and liquid in water bodies, and are easy to harden , and provide a preparation method of granular drinking water arsenic removal adsorption material

Method used

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  • Preparation method of granular drinking water arsenic-removing adsorption material
  • Preparation method of granular drinking water arsenic-removing adsorption material

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specific Embodiment approach 1

[0026] Specific Embodiment 1: This embodiment is a preparation method of a granular drinking water arsenic removal adsorption material, which is specifically carried out according to the following steps:

[0027] 1. Mix soluble iron salt and soluble titanium salt in water to prepare solution a;

[0028] 2. Mix soluble permanganate and basic compound I in water to prepare solution b;

[0029] 3. Under the condition of rapid stirring, drop solution b into solution a drop by drop, and then continue to stir for 10min~2h to obtain solution c with a pH of 6~9; stand and age for 1h~4h, pour out the supernatant , wash the solid precipitate repeatedly with deionized water until no anions are detected by ion chromatography; filter the precipitate with suction to obtain a filter cake, dry it at 20°C to 120°C, grind it, pass through a sieve of 80 mesh to 100 mesh, Obtain powdery arsenic removal adsorption material;

[0030] 4. Under the condition of stirring, dissolve chitosan in weak a...

specific Embodiment approach 2

[0041] Embodiment 2: This embodiment differs from Embodiment 1 in that the soluble ferrous salt is one or a mixture of ferrous chloride and ferrous sulfate. Others are the same as the first embodiment.

specific Embodiment approach 3

[0042] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the soluble ferric salt is one or a mixture of ferric chloride, ferric sulfate and ferric nitrate. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a granular drinking water arsenic-removing adsorption material and relates to a preparation method of a drinking water arsenic-removing adsorption material. The preparation method aims to solve the technical problems that it is difficult for a conventional powdery arsenic-removal adsorbing material to remove As (III) and As (V) and be subjected to solid-liquid separation in a water body, and the conventional powdery arsenic-removal adsorbing material is poor in mechanicalness and prone to hardening. The preparation method includes preparing a powdery efficient arsenic-removing adsorption material, adding such material into a chitosan solution, dropping into an alkaline solution for forming, and drying. The preparation method of the granular drinking water arsenic-removing adsorption material has the advantages that the granular drinking water arsenic-removing adsorption material inherits the advantages of high arsenic adsorption capacity,photocatalytic oxidation and mild oxidizability of mother components, is small and uniform in size, high in mechanical strength, capable of adsorbing arsenic effectively and excellent in water purifying capability, and can reach the arsenic content specified by sanitary standards for drinking water; the preparation method is simple, low in cost, environment friendly and easy to achieve solid-liquid separation.

Description

technical field [0001] The invention relates to a preparation method of an adsorption material for removing arsenic from drinking water. Background technique [0002] Due to the high toxicity and carcinogenicity of arsenic, arsenic pollution in water has become a health problem of widespread concern all over the world. According to reports, arsenic poisoning incidents in drinking water have occurred in countries and regions all over the world, including Bangladesh, China, India, the United States, Chile, and the European Union. In some areas, the concentration of arsenic in groundwater is as high as 100 μg / L to 2000 μg / L, which is much higher than The concentration of arsenic (10 μg / L) stipulated in the drinking water hygiene standard. Arsenic in water mainly comes from natural geochemical processes (such as reductive dissolution, desorption and release of arsenic-containing minerals, etc.) and human activities (such as mineral smelting, leather processing, chemical manufac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28B01J20/30
CPCB01J20/0211B01J20/0229B01J20/0274B01J20/24C02F1/28
Inventor 张伟马军郑彤
Owner HARBIN INST OF TECH
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