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Radioactively contaminated soil conditioner and preparation method thereof

A technology of soil conditioner and intercalation agent, applied in the field of soil remediation, which can solve the problems of poor remediation of radioactively contaminated soil, etc., and achieve the effect of improving long-term adsorption performance, guaranteed adsorption effect, and excellent adsorption performance

Active Publication Date: 2019-01-22
核工业西南勘察设计研究院有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a radioactively contaminated soil conditioner and its preparation method, to solve the problem that the existing clay-based soil conditioner is not effective in repairing radioactively polluted soil

Method used

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  • Radioactively contaminated soil conditioner and preparation method thereof

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Effect test

Embodiment 1

[0023] The preparation method of the radioactively contaminated soil conditioner of the present embodiment comprises the following specific steps:

[0024] (1) Mix montmorillonite and sodium chloride according to the mass ratio of 9:1, add deionized water and stir in a constant temperature water bath at 55°C until it becomes colloidal to obtain sodium montmorillonite colloid; the amount of deionized water is optimal Carry out according to the material-to-liquid ratio of 12:1; in other embodiments of the present invention, it is also possible to follow other ratios, so as to be able to completely dissolve the materials.

[0025] (2) Mix the sodium montmorillonite colloid with the intercalation agent solution with a mass fraction of 1% according to a mass ratio of 1:3.5, and react for 26 hours at 60°C and a pH of 6 to obtain intercalation montmorillonite stone solution;

[0026] (3) The intercalated montmorillonite solution and sodium humate were mixed according to a mass ratio...

Embodiment 2

[0028] The preparation method of the radioactively contaminated soil conditioner of the present embodiment comprises the following specific steps:

[0029] (1) Mix montmorillonite and sodium chloride at a mass ratio of 12:1, add deionized water and stir in a constant temperature water bath at 65°C until it becomes colloidal to obtain sodium montmorillonite colloid; the amount of deionized water added is optimal Carry out according to the ratio of material to liquid of 8:1;

[0030] (2) Mix the sodium montmorillonite colloid with the intercalation agent solution with a mass fraction of 1.1% at a mass ratio of 1:5, and react for 22 hours at 70°C and a pH of 6.5 to obtain intercalated montmorillonite stone solution;

[0031] (3) The intercalated montmorillonite solution and sodium humate were mixed according to a mass ratio of 4:1, reacted for 22 hours, dried and then ground to obtain the soil conditioner.

Embodiment 3

[0033] The preparation method of the radioactively contaminated soil conditioner of the present embodiment comprises the following specific steps:

[0034] (1) Mix montmorillonite and sodium chloride at a mass ratio of 10:1, add deionized water and stir in a constant temperature water bath at 60°C until it becomes colloidal to obtain sodium montmorillonite colloid; the amount of deionized water added is optimal According to the ratio of solid to liquid of 10:1.

[0035] (2) Mix the sodium montmorillonite colloid with the intercalation agent solution with a mass fraction of 1.05% according to a mass ratio of 1:4, and react for 24 hours at 65°C and a pH of 6.2 to obtain intercalation montmorillonite stone solution;

[0036] (3) The intercalated montmorillonite solution and sodium humate were mixed according to a mass ratio of 3:1, reacted for 24 hours, dried and then ground to obtain the soil conditioner.

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Abstract

The invention discloses a radioactively contaminated soil conditioner and a preparation method thereof, and belongs to the technical field of soil remediation. According to the method, montmorilloniteis reacted with an intercalator after being subjected to sodium treatment, and an obtained intercalated montmorillonite solution is reacted with sodium humate to prepare the soil conditioner. The radioactively contaminated soil conditioner provided by the invention has good adsorption effects on radioactive elements and heavy metal ions, and thus can be widely applied to remediation of radioactively contaminated soil and heavy metal contaminated soil; moreover, the selected raw materials are simple and easy to obtain, and the preparation process is easy to operate, so that industrialized production of the conditioner can be achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a conditioner for radioactively polluted soil and a preparation method thereof. Background technique [0002] Radioactive pollution is a very important environmental pollution problem today. Unlike other forms of environmental pollution, radioactive pollution is not easy to detect, but it is easy to accumulate in organisms, which has a profound and lasting impact, seriously affecting the ecosystem and human health. [0003] Clay minerals have a large specific surface area, are negatively charged, and have strong adsorption properties, which can realize the adsorption of metal cations. In the field of radioactive waste disposal, they are often used as buffer materials to prevent the migration of radioactive elements. Although a single clay mineral has adsorption properties, after it adsorbs a certain amount of radioactive elements or heavy metal ions, the interlayer expan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 田华黄伟陶瑜岳建国董云赵国华朱丹李萍冯瑞陈龙飞边鹏
Owner 核工业西南勘察设计研究院有限公司
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