Adsorbing material for removing arsenic from water and preparation method of material

A technology for adsorbing materials and water bodies, applied in the field of arsenic-containing water purification treatment materials and processes, can solve problems such as not being widely used, and achieve the effects of large specific surface area, low cost and simple process

Inactive Publication Date: 2013-09-04
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its purification efficiency and cost factors, it has not been widely used

Method used

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  • Adsorbing material for removing arsenic from water and preparation method of material
  • Adsorbing material for removing arsenic from water and preparation method of material
  • Adsorbing material for removing arsenic from water and preparation method of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Weigh 4.040g Fe(NO 3 ) 3 ?9H 2 O, dissolved in 200ml deionized water to obtain Fe 3+ Molar concentration is the iron nitrate solution of 0.05mol / L;

[0032] (2) Weigh 0.02g of surfactant sodium dodecyl sulfonate, add it to the above solution, and stir to make it uniform;

[0033] (3) Add potassium hydroxide to the solution in step (2), and keep stirring until the pH of the solution=10, forming a large amount of insoluble matter;

[0034] (4) Collect a large amount of insoluble matter described in step (3) by suction filtration, wash with deionized water, and suction filtration until the pH of the solution is neutral;

[0035] (5) Collect the solid insolubles in step (4), and dry them in the air at 60°C to obtain amorphous ferric hydroxide powder.

Embodiment 2

[0037] (1) Weigh 40.40g Fe(NO 3 ) 3 ?9H 2 O, dissolved in 200ml deionized water to obtain Fe 3+ Molar concentration is the iron nitrate solution of 0.5mol / L;

[0038] (2) Weigh 0.02g of surfactant sodium dodecyl sulfonate, add it to the above solution, and stir to make it uniform;

[0039] (3) Add ammonia water to the solution in step (2), and keep stirring until the pH of the solution=10, forming a large amount of insoluble matter;

[0040] (4) Collect a large amount of insoluble matter described in step (3) by suction filtration, wash with deionized water, and suction filtration until the pH of the solution is neutral;

[0041] (5) Collect the solid insolubles in step (4), and dry them in the air at 60°C to obtain amorphous ferric hydroxide powder.

[0042] (6) At room temperature, weigh 0.2 g of the above-mentioned adsorption materials in a series of 250 mL Erlenmeyer flasks with stoppers, and add 100 mL of a certain concentration of As ( ) (AsO 2 - ) solution, pla...

Embodiment 3

[0047] (1) Weigh 40.40g Fe(NO 3 ) 3 ?9H 2 O, dissolved in 200ml deionized water to obtain Fe 3+ Molar concentration is the iron nitrate solution of 0.5mol / L;

[0048] (2) Weigh 0.87g Ce(NO 3 ) 3 ?6H 2 O, dissolved in the solution of step (1), yields Ce 3+ Molar concentration is the cerous nitrate solution of 0.01mol / L;

[0049] (3) Weigh 0.02g of surfactant sodium dodecylsulfonate, add it to the above solution, and stir to make it uniform;

[0050] (4) Weigh 0.68 g of hydrogen peroxide with a mass fraction of 30% and pour it into the solution in step (3) (Ce 3+ The molar ratio of hydrogen peroxide to hydrogen peroxide is 1:3), and keep stirring to oxidize trivalent cerous ions into tetravalent ceric ions;

[0051] (5) Add potassium hydroxide to the solution in step (4), and keep stirring until the pH of the solution=10, forming a large amount of insoluble matter;

[0052] (6) Collect a large amount of insoluble matter described in step (5) by suction filtration, was...

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Abstract

The invention discloses an adsorbing material for removing arsenic from water and a preparation method of the material. The preparation method comprises the steps as follows: certain amounts of cerous salt and ferric salt are dissolved in appropriate water, hydrogen peroxide is taken as an oxidizing agent, and cerous ions are oxidized; and an alkali liquid is taken as a precipitator, a coprecipitation reaction happens, and drying is performed at a certain temperature, so that the amorphous ferric hydroxide adsorbing material loaded with nano cerium oxide is obtained. The arsenic-removing adsorbing material has a strong absorption action on arsenic ions in the water, and is simple in preparation process and low in cost; when arsenic in a water solution is processed, water is not required to be preprocessed; and the material can be applied to removing of arsenic in drinking water or industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of arsenic-containing water purification treatment materials and processes, in particular to an adsorption material for removing arsenic from water bodies and a preparation method thereof. Background technique [0002] Arsenic is a killer of human health! Inorganic arsenic is mainly arsenite ion (AsO 2 - ) and As(Ⅴ) arsenate ions (AsO 4 3- ) form in water. [0003] The removal of arsenic ions in water mainly includes precipitation method, electrodialysis method, biochemical method, ion exchange method and adsorption method. Adsorption method mainly uses high specific surface area and insoluble solid material as adsorbent, and then adsorbs arsenic pollutants in water on its surface through mechanisms such as physical adsorption, chemical adsorption and ion exchange, so as to achieve the purpose of removing arsenic . A large number of studies have shown that the removal of arsenic by adsorption is relia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F1/62
Inventor 沈国柱程国生候闯明刘雨雷佳捷孙丹丹
Owner NANJING UNIV OF INFORMATION SCI & TECH
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