Preparation method of arsenic removing adsorbent with effects of magnetic separation, photo-catalytic oxidation and adsorption

A photocatalytic oxidation and adsorption technology, which is applied in adsorption water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc. Effect

Inactive Publication Date: 2016-01-06
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the disadvantages of cumbersome process, this method requires equipment such as ultraviolet light source and photoelectrode in the process of photocatalytic oxidation, which increases the operating cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 6.0 grams of melamine into the crucible, place it in a muffle furnace after capping, heat up to 550°C, keep it for 2 hours, and cool to room temperature naturally to obtain graphite phase carbon nitride.

[0013] Take 1.00 g of graphite phase carbon nitride and mix with 160 ml of deionized water and 90 ml of absolute ethanol. The resulting mixture is ultrasonically oscillated in an ultrasonic oscillator for 5 hours, then heated to 80°C, and then added to the mixture separately 20 ml of ferric chloride aqueous solution with a concentration of 0.037 mol / l and 20 ml of ferric chloride aqueous solution with a concentration of 0.018 mol / l, after mechanical stirring at 80°C for 30 minutes, quickly add 2 ml with a mass ratio of 25-28 % Concentrated ammonia water to make the pH value of the mixed solution about 10. After 30 minutes of heat preservation and stirring, the mixed solution is cooled, the solid is filtered out, washed with deionized water, and dried to obtain an adso...

Embodiment 2

[0016] Add 6.0 grams of melamine into the crucible, place it in a muffle furnace after capping, heat up to 550°C, keep it for 2 hours, and cool to room temperature naturally to obtain graphite phase carbon nitride.

[0017] Take 1.00 g of graphite phase carbon nitride and mix with 160 ml of deionized water and 90 ml of absolute ethanol. After sonicating the resulting mixture in an ultrasonic oscillator for 5 hours, heat it to 80°C, and then add 20 to the mixture. One milliliter of ferric chloride aqueous solution with a concentration of 0.106 mol / liter and 20 milliliters of ferric chloride aqueous solution with a concentration of 0.053 mol / liter, mechanically stirred at 80°C for 30 minutes, quickly add 4 milliliters with a mass ratio of 25-28% The pH of the mixed solution is about 10, and the mixture is kept for 30 minutes after the reaction is kept warm and stirred, the mixed solution is cooled, the solid is filtered out, washed with deionized water, and dried to obtain an adsorb...

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PUM

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Abstract

The invention discloses a preparation method of an arsenic removing adsorbent with effects of magnetic separation, photo-catalytic oxidation and adsorption. The preparation method adopts melamine, iron trichloride, iron dichloride and the like as raw materials to prepare the arsenic removing adsorbent with the effects of magnetic separation, photo-catalytic oxidation and adsorption. The arsenic removing adsorbent can oxidize trivalent arsenic into pentavalent arsenic which is easy to treat under the irradiation of visible light, then the pentavalent arsenic is removed by using excellent adsorption property of the arsenic removing adsorbent, and magnetic separation of the arsenic removing adsorbent can be realized; the preparation method disclosed by the invention is simple in process, convenient to operate and low in cost, and can organically combines photo-catalytic oxidation with adsorption to effectively remove trivalent arsenic in water; and the separation and recovery of the arsenic removing adsorbent are more convenient and quicker.

Description

[0001] Technical Field: The present invention relates to a preparation method of an adsorbent for removing arsenic with magnetic separation, photocatalytic oxidation and adsorption. Background technique [0002] Arsenic pollution in groundwater or surface water poses a huge threat to humans and other organisms. Many methods are used to remove arsenic from water to reach the World Health Organization's standard of arsenic content not exceeding 10 micrograms / liter. The use of adsorbents to remove arsenic is currently a commonly used method. However, since the main existing forms of inorganic arsenic in groundwater or surface water are pentavalent arsenic and trivalent arsenic, the toxicity of trivalent arsenic is 25-60 times that of pentavalent arsenic, and the removal efficiency of trivalent arsenic by common arsenic removal adsorbents is all Less than pentavalent arsenic. Therefore, in order to improve the arsenic removal efficiency of the arsenic removal adsorbent, trivalent a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48C02F1/30C02F1/28C02F1/58C02F101/10
Inventor 纪春暖曲荣君池胜华
Owner LUDONG UNIVERSITY
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