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Uranium mining method by water hyacinth biomass

A biomass and water hyacinth technology, applied in biochemical equipment and methods, water pollutants, chemical instruments and methods, etc., can solve problems such as high technical requirements, high cost of membrane separation technology, and ineffective extraction of low-concentration uranium , to achieve resource saving, fast growth and good economic benefits

Inactive Publication Date: 2018-06-01
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, because the hazards of uranium are hidden, latent, and cumulative, it is difficult for ordinary people to detect and take effective protective measures. Therefore, uranium pollution must be cured from the source
The traditional chemical precipitation method, electrolysis method, and membrane separation technology have high cost and high technical requirements, and the extraction effect on low-concentration uranium is not obvious

Method used

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  • Uranium mining method by water hyacinth biomass
  • Uranium mining method by water hyacinth biomass
  • Uranium mining method by water hyacinth biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 As shown, in the case of controlling other conditions unchanged and only the single variable of pH, the experimental conditions are at room temperature (298 K), in 100ml solution, the dosage is 0.1g water hyacinth dry powder adsorbent, the initial uranium The concentration was 15 µg / L, and HCl and NaOH solutions were used to adjust the pH value of the solution. The adsorption capacity of water hyacinth dry powder adsorbent to uranium changed with the pH value. After adsorption for 4 hours, the adsorption rate was the highest when the pH value of the solution was about 3.

Embodiment 2

[0025] Such as figure 2 As shown, in the case of controlling other conditions unchanged and only the dosage is a single variable, the experimental conditions are at room temperature (298 K), in 100ml solution, pH is 3, initial uranium concentration is 15 µg / L, After 4 hours of adsorption, when the dosage of modified water hyacinth dry powder was 0.1g, the removal rate was the highest, up to about 80%.

Embodiment 3

[0027] from image 3 It can be seen that when other conditions are kept constant and only the adsorption time is the single variable, the experimental conditions are at room temperature (298 K), in a 100ml solution, with a pH of 3 and an initial dosage of 0.1g. When the concentration of uranium is 15 μg / L, the capacity adsorption time of modified water hyacinth dry powder to adsorb uranium is fast within 180 minutes, and then reaches the equilibrium state.

[0028] Project economic benefit calculation:

[0029] 1. This project processes about 50m of uranium tailings liquid per day 3 , the uranium content is 5*10 -6 g / ml, daily U 3 o 8 The amount is 33kg. Annual output U 3 o 8 The volume is 12 tons, and it is valuable as a uranium resource recovery, with a recycling profit of 1.08 billion yuan.

[0030] 2. Daily production of biogas 1500m 3 , daily power generation 2250kwh, annual tailings processing 18250m 3 , with an annual biogas output of 547,500m 3 , The annual ...

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Abstract

Uranium mining by water hyacinth biomass is as follows: a large amount of water hyacinth biomass is thrown into uranium mine tailing liquid, after uranium in water is adsorbed by biomass to a certaindegree, uranium mine tailing liquid is filtered, and biogas fermentation treatment is carried out for obtained uranium-rich biomass; fermented residues are dried into biogas residue cakes, high temperature burning is carried out in order to form uranium containing biological ores. The method comprises the following concrete steps: (1) preparation of water hyacinth biomass; (2) pH value of the uranium mine tailing liquid is adjusted, and stirring and adsorption treatment are carried out; (3) after uranium is adsorbed to a certain degree, filtering is carried out, and biogas fermentation is carried out for obtained filter residues; (4) fermentation residues are dried, high temperature burning treatment is carried out, and residue ash content is uranium containing biological ore. The method has the advantages of high recovery rate, simple operation, low cost, energy saving and environmental protection, and the like.

Description

technical field [0001] The invention provides a method for collecting uranium from uranium tailings liquid, which uses water hyacinth biomass to absorb uranium in the water body, and then performs biogas fermentation on the obtained uranium-containing biomass, and the fermentation residue is dried and then incinerated at high temperature to form Uranium-containing bio-ores. This patent application requests the priority of the patent application with the application number 2017103377111 and the title of "a water hyacinth dry powder adsorbent and its adsorption of uranium and post-treatment process". Background technique [0002] The uranium mining process involves various treatment processes and a large amount of wastewater. The traditional process of hydrometallurgy of uranium ore is ore collection, crushing and leaching, extraction and concentration. The products of hydrometallurgy are dried at high temperature to obtain yellow cake, which is converted into UF6 by chemical...

Claims

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Application Information

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IPC IPC(8): C02F1/28B01J20/22B01J20/30C02F9/04G21F9/06G21F9/12G21F9/14C12M1/107C02F101/00C02F101/20
CPCB01J20/22B01J2220/4843C02F1/001C02F1/286C02F1/66C02F9/00C02F2101/006C02F2101/20C12M1/107G21F9/06G21F9/12G21F9/14Y02E50/30
Inventor 黄德娟任强郭正远黄德超陈睿黎武元李天文
Owner EAST CHINA UNIV OF TECH