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Zirconium-loaded organic hybridizing adsorbent capable of removing radioactive caesium in water as well as preparation and use method of zirconium-loaded organic hybridizing adsorbent

An organic hybridization and adsorbent technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of large fluid resistance, difficult solid-liquid separation, easy loss, etc., to achieve enhanced dispersion state, improved removal capacity, good The effect of adsorption capacity

Inactive Publication Date: 2015-12-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the application process, zirconium phosphate usually exists as ultrafine powder, and there are problems such as large fluid resistance, difficult solid-liquid separation, and easy loss when applied to column adsorption or fluid separation processes. Therefore, in the field of cesium-containing wastewater treatment not really applied yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Measure cation exchange resin D0016g as carrier material, place it in 50mL containing 35% ZrOCl 2 ·8H 2 O aqueous solution, control the temperature at 40 °C, and stir thoroughly for 20 h. Then, filter out the resin particles and add them to 500mL phosphoric acid solution with a volume fraction of 20%, react at 25°C, control the reaction time at 20h, filter after the reaction is completed, and heat-treat the resin at 40°C for 5h, The obtained zirconium-loaded organic hybrid material adsorbent has a zirconium loading of 13%.

[0022] Put 3mL of the above zirconium-loaded organic hybrid material adsorbent in a glass adsorption column (ф12×220mm), and simulate cesium-containing wastewater (Cs + =2mg / L and Na + =200mg / L, Ca 2+ =200mg / L, Mg 2+ =200mg / L, pH=5) flow through the adsorption column equipped with the hybrid material from top to bottom, the temperature is controlled at 20°C, and the flow rate is 10BV / h. After the hybrid material is adsorbed, the effluent Cs + ...

Embodiment 2

[0024] Measure cation exchange resin D11315g as carrier material, place it in 100mL containing 30% ZrOCl 2 ·8H 2 O aqueous solution, control the temperature at 60°C, and stir well for 24h. Then, filter out the resin particles and add them to 600mL of phosphoric acid solution with a volume fraction of 60%, react at 25°C, control the reaction time at 24h, filter after the reaction is completed, and heat-treat the resin at 60°C for 10h. The obtained zirconium-loaded organic hybrid material adsorbent has a zirconium loading of 37%.

[0025] Put 3mL of the above zirconium-loaded organic hybrid material adsorbent in a glass adsorption column (ф12×220mm), and simulate cesium-containing wastewater (Cs + =10mg / L and Na + =200mg / L, Ca 2+ =200mg / L, Mg 2+ =200mg / L, pH=4) flow through the adsorption column equipped with the hybrid material from top to bottom, the temperature is controlled at 30°C, and the flow rate is 15BV / h. After the hybrid material is adsorbed, the effluent Cs + T...

Embodiment 3

[0027] Measure cation exchange resin 001x74g as carrier material, place it in 80mL containing 10% ZrOCl 2 ·8H 2 O aqueous solution, control the temperature at 45°C, and stir thoroughly for 22h. Then, the resin particles were filtered out and added to 400 mL of phosphoric acid solution with a volume fraction of 30%, and the reaction was carried out at 25°C. The reaction time was controlled at 22h. After the reaction was completed, it was filtered, and the resin was heat-treated at 45°C for 8h. Then an adsorbent of zirconium-loaded organic hybrid material is obtained, and the loading amount of zirconium is 24%.

[0028] Put 3mL of the above zirconium-loaded organic hybrid material adsorbent in a glass adsorption column (ф12×220mm), and simulate cesium-containing wastewater (Cs + =8mg / L and Na + =200mg / L, Ca 2+ =200mg / L, Mg 2+ =200mg / L, pH=6) flow through the adsorption column equipped with the hybrid material from top to bottom, the temperature is controlled at 40°C, and th...

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Abstract

The invention relates to a zirconium-loaded organic hybridizing adsorbent capable of removing radioactive caesium in water as well as preparation and a use method of the zirconium-loaded organic hybridizing adsorbent. The adsorbent is a nano zirconium phosphate-strong acid cation exchange resin organic hybrid material adsorbent with zirconium loading capacity of 13%-37%. The preparation method comprises the following steps: preparing a precursor by using zirconium oxychloride as nano zirconium phosphate, dissolving the precursor in 10%-35% deionized water, then adding a certain mass of strong acid cation exchange resin with solid-to-liquid ratio of 50-150g / L and reaction temperature of 40-60 DEG C, fully stirring for 18-36h and then filtering out resin particles; adding the resin particles to a 20%-60% phosphoric acid solution in volume fraction, fully stirring for 18-36h at the temperature of 15-25 DEG C and then filtering out, and carrying out thermal treatment for 5-10h at the temperature of 40-60 DEG C after washing the solution to be neutral. The adsorbent disclosed by the invention is large in caesium adsorbing capacity and short in equilibrium time and still shows good adsorbability when conventional high-concentration positive ions including Na<+>, Ca<2+> and Mg<2+> and the like exist in the water; the preparation method is simple.

Description

technical field [0001] The invention relates to an adsorbent and a purification method for purifying water, in particular to an adsorbent and a purification method for removing radioactive nuclides in water. Background technique [0002] Radioactive cesium ( 137 Cs, 134 Cs, etc.) is one of the products of nuclear fission in uranium-based fuel nuclear reactors, and is also the main source of gamma radioactivity in radioactive waste. Under the normal operating conditions of nuclear power plants, appropriate purification treatment is required so that most of the radioactive cesium in radioactive wastewater is finally enriched in solid waste and safely disposed of to avoid harm to the environment. If extreme accident conditions occur during the operation of the nuclear power plant, a large amount of cesium-containing wastewater may flow into the environmental water body in a short period of time, and gradually deposit in the soil, and finally enter the biosphere through migrat...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
Inventor 孙奇娜付明岩李聪徐计杨雨佳张庆瑞
Owner YANSHAN UNIV
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