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Method for treating radioactive elements in soil by using agricultural waste

A technology for radioactive elements and agricultural wastes, applied in the field of soil in-situ remediation, can solve problems such as alleviating the lack of radioactive element pollution, and achieve the effect of reducing potential ecological risks, obvious effect, and reducing migration.

Active Publication Date: 2017-12-26
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for treating radioactive elements in soil by using agricultural waste, and solve the problem of alleviating the lack of radioactive element pollution in the existing methods for treating radioactive element pollution in soil

Method used

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  • Method for treating radioactive elements in soil by using agricultural waste

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Embodiment 1

[0020] In this embodiment, rice straw is used as a raw material, and after being treated, it is calcined in a muffle furnace at a temperature of 350°C under the protection of nitrogen to obtain a biocarbonaceous material.

[0021] The soil with iodine 131 pollution concentration of 2.46mg / g has an organic matter content of 0%, a clay content of 5%, and a pH of 7.0. Add 100g of polluted soil into the beaker, then add 1.0% bio-carbonaceous material and mix well; at the same time, add 1.0% of non-polluted soil to 100g of polluted soil as a control. Add 1L of pure water to the soil for soaking (equivalent to above the rainstorm level), and stir every 8 hours to fully contact the water and soil. After 2 days of treatment, the residual iodine content in the soil solid phase and the iodine content in the liquid phase were measured respectively. The results showed that the residual iodine content in the soil added with biochar increased by 59.0% compared with the control without addin...

Embodiment 2

[0023] In this embodiment, rice straw is used as a raw material, and after being treated, it is calcined in a muffle furnace at a temperature of 450° C. under the protection of nitrogen to obtain a biological carbonaceous material.

[0024] The soil with iodine 131 pollution concentration of 2.46mg / g has an organic matter content of 5%, a clay content of 40%, and a pH of 4.5. Add 100g of polluted soil into the beaker, then add 1.5% bio-carbonaceous material and mix well; at the same time, add 1.5% of non-polluted soil to 100g of polluted soil as a control. Add 1L of pure water to the soil for soaking (equivalent to above the rainstorm level), and stir every 8 hours to fully contact the water and soil. After 2 days of treatment, the residual iodine content in the soil solid phase and the iodine content in the liquid phase were measured respectively. The results showed that the residual iodine content in the soil added with biochar increased by 65.3% compared with the control wi...

Embodiment 3

[0026] In this embodiment, rice straw is used as a raw material, and after treatment, it is calcined in a muffle furnace at a temperature of 400°C under the protection of nitrogen to obtain a biocarbonaceous material.

[0027] The soil with iodine 131 pollution concentration of 2.46mg / g has an organic matter content of 3%, a clay content of 30%, and a pH of 5.5. Add 100g of polluted soil into the beaker, then add 1.0% bio-carbonaceous material and mix well; at the same time, add 1.0% of non-polluted soil to 100g of polluted soil as a control. Add 1L of water for soaking (equivalent to acid rain above the rainstorm level), and stir every 8 hours to fully contact the water and soil. After 2 days of treatment, the iodine residues in the soil solid phase and the iodine content in the liquid phase were measured respectively. The results showed that the iodine residues in the soil added with biochar after treatment increased by 77.1% compared with the control without adding, which w...

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Abstract

A method that uses agricultural waste to deal with radioactive elements in the soil, including the following steps: agricultural waste cracks in hypoxia to obtain biological carbon materials;The amount is 0.25 % ‑ 1.5 % mixed with soil pollution contaminated by radioactive elements.The invention uses biological carbon materials to fix the radioactive elements in the soil, reduce the migration of radioactive elements, reduce its potential ecological risks, and alleviate the pollution of soil radioactive elements.The method of this invention is simple, low in cost, obvious effect and friendly environment.

Description

technical field [0001] The invention relates to the technical field of in-situ restoration of soil, in particular to a method for treating radioactive elements in soil by using agricultural waste. Background technique [0002] At present, the safe use of nuclear energy, especially nuclear power plants, has become a technology with great potential and favored by all countries. However, since the Fukushima nuclear power plant explosion accident in Japan in March 2011, the potential environmental risks brought by the use of nuclear energy have received renewed attention. If the stored radioactive waste leaks, the radioactive elements will directly enter the surrounding soil, or the radioactive pollutants will be scattered in the atmosphere, settle in the water source, and finally enter the soil (other parts directly enter the soil). After the pollutants enter the soil, they endanger the stability of the ecosystem, enter plants (including food crops, vegetables, fruit trees), a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 张栋赵红挺吕挺金美青杨磊王希铭
Owner HANGZHOU DIANZI UNIV
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