Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of gamma-Fe2O3-coated HAP magnetic composite material for removing uranium

A magnetic composite material and composite material technology, applied in the field of preparation of γ-Fe2O3@HAP magnetic composite material, can solve the problems of unconsidered material disposal, environmental secondary pollution, complex preparation process of adsorption or removal agent, and inability to recycle and use, etc. problems, to achieve excellent purification effect, fast adsorption speed, and easy recovery

Pending Publication Date: 2022-04-29
GUANGZHOU UNIVERSITY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydroxyapatite material synthesized in the prior art has a good effect on the adsorption of uranyl ions, but the preparation process of the adsorption or removal agent is complicated, and some of them need to adjust the pH of the wastewater for pretreatment, and some of them have high investment costs. The existing synthetic hydroxyapatite materials cannot be recycled, and the disposal of the adsorbed materials and the secondary pollution of the environment have not been considered.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of gamma-Fe2O3-coated HAP magnetic composite material for removing uranium
  • Preparation method of gamma-Fe2O3-coated HAP magnetic composite material for removing uranium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] A method for preparing a γ-Fe2O3@HAP magnetic composite material for removing uranium, comprising the following steps:

[0039] Step 1, weigh 0.5392g γ-Fe 2 o3 Disperse in 20mL ethylene glycol, then add 30mL water, stir evenly to form magnetic levitation solution A;

[0040] Step 2, weigh 7.9583g (33.7mmol) of Ca(NO 3 ) 2 4H 2 O was dissolved in 100mL deionized water, and stirred evenly to form solution B;

[0041] Step 3: Mix the magnetic levitation solution A with the solution B, stir evenly and adjust the pH to 11 with diluted ammonia solution;

[0042] Step 4, weigh 2.6412g (20mmol) of (NH 4 ) 2 HPO 4 Dissolve in 50mL deionized water, stir evenly and add dropwise to the mixed solution prepared in step 3 with a burette;

[0043] Step 5, place the mixed solution prepared in step 4 in an oil bath at 90°C for 4 hours, take it out and age it overnight;

[0044] Step 6, obtain the solid by solid-liquid separation, wash it several times with deionized water and ab...

example 1

[0046] With the gamma-Fe that embodiment 1 makes 2 o 3 The @HAP composite material is used as a sample to determine the relationship between uranium adsorption performance and adsorption time, including the following steps:

[0047] Step 1: Prepare 50 mL of uranium solution with an initial concentration of 50 mg / L, and adjust the pH of the solution to 4.

[0048] Step 2: Add 0.0125 g of the adsorbent prepared in Example 1 to the solution in Step 1, shake the reaction at room temperature, take samples at different times, and filter the water samples for later use.

[0049] In step 3, the concentration of uranium in the water sample obtained in step 2 is detected by spectrophotometry, and the adsorption capacity of the adsorbent at different equilibrium concentrations is calculated. see attached results figure 1 .

[0050] The detection result of the present embodiment is: the gamma-Fe that embodiment 1 prepares 2 o 3 The adsorption of uranium by the @HAP composite materia...

) example 2

[0052] With the gamma-Fe that embodiment 1 makes 2 o 3 The @HAP composite material is used as a sample to measure the adsorption capacity under different concentrations of uranium, including the following steps:

[0053] Step 1, prepare 50 mL of uranium solutions with concentration gradients of 30, 50, 80, 100, 200, 300 and 500 mg / L and initial concentration pH=4.

[0054] Step 2: Add 0.0125 g of the adsorbent prepared in Example 1 to the solution in Step 1, shake and react at room temperature, take a sample after the reaction reaches equilibrium, and filter the water sample for later use.

[0055] In step 3, the concentration of uranium in the water sample obtained in step 2 is detected by spectrophotometry, and the adsorption capacity of the adsorbent at different equilibrium concentrations is calculated. see attached results figure 2 .

[0056] The detection result of the present embodiment is: the gamma-Fe that embodiment 1 prepares 2 o 3 The maximum adsorption capa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a gamma-Fe2O3-coated HAP magnetic composite material for uranium removal, and the method comprises the following steps: step 1, weighing gamma-Fe2O3, dispersing the gamma-Fe2O3 in ethylene glycol, and then adding deionized water to obtain a solution A; 2, Ca (NO3) 2.4 H2O is weighed and dissolved in deionized water, and a solution B is obtained; step 3, mixing the solution A with the solution B, and adjusting the pH value to 10-12 to obtain a solution C; step 4, weighing (NH4) 2HPO4, dissolving the weighed (NH4) 2HPO4 into deionized water, and dropwise adding the solution into the solution C by using a burette; step 5, treating in an oil bath at 80-100 DEG C for 3-5 hours, and aging overnight; and step 6, carrying out solid-liquid separation to obtain a solid, so as to obtain the gamma-Fe2O3-coated HAP composite material. The composite material is applied to enrichment and recovery of uranium, is easy to synthesize, has an efficient uranium removal effect, and can be magnetically recovered and reused.

Description

technical field [0001] The invention relates to the technical field of preparation of new materials, in particular to a gamma-Fe used for removing uranium 2 o 3 Preparation method of @HAP magnetic composite material. Background technique [0002] In recent years, the rapid development of nuclear power and the large-scale development and application of nuclear energy have promoted the massive use of uranium resources. In the process of uranium mining, nuclear fuel processing, nuclear power generation and spent fuel reprocessing, a large amount of uranium-containing radioactive waste will be produced. Uranium is radioactive, heavy metal toxic and highly mobile, and cannot be biodegraded after entering the ecological environment, which will pose a serious threat to the ecological environment and human health. Radioactive waste must be effectively disposed of, and the treatment of uranium-containing wastewater is an important part of radioactive waste treatment. The traditio...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30C02F1/28
CPCB01J20/0292B01J20/28009C02F1/281C02F2101/006
Inventor 苏敏华李红马楚勤韩卫星刘贺瑶李家宜沈琮杰陈迪云
Owner GUANGZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products