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Cadmium-polluted farmland soil repairing agent and preparing method and application thereof

A soil remediation agent and cadmium-contaminated technology, applied in the field of soil remediation, achieves the effects of short remediation period, simple preparation method, and maintenance of structure and acid-base balance

Inactive Publication Date: 2018-02-16
北京润鸣环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the existing problems of cadmium pollution in farmland, the object of the present invention is to provide a soil remediation agent for farmland cadmium pollution that is environmentally friendly, low in cost, short in repair period and has a good passivation effect on heavy metal cadmium

Method used

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  • Cadmium-polluted farmland soil repairing agent and preparing method and application thereof
  • Cadmium-polluted farmland soil repairing agent and preparing method and application thereof
  • Cadmium-polluted farmland soil repairing agent and preparing method and application thereof

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preparation example Construction

[0041] Part of the specific embodiments of the present invention provides a soil remediation agent for cadmium-contaminated farmland and its preparation method and application. The soil remediation agent mainly includes the following components in parts by weight: 10-15 parts of montmorillonite, magnesium oxide 10 to 15 parts, 20 to 40 parts of biological calcium material and 20 to 40 parts of biochar.

[0042] The use method is to apply the soil remediation agent to the cadmium-contaminated farmland, and the application amount is 300kg / mu-600kg / mu.

Embodiment 1

[0045] This embodiment provides a soil remediation agent for cadmium-contaminated farmland and a preparation method thereof. The soil remediation agent mainly includes the following components in parts by weight: 13 parts of montmorillonite, 13 parts of magnesium oxide, and 26 parts of biological calcium materials and 26 parts of biochar; wherein, the montmorillonite is sodium-based montmorillonite with a mesh number of 200 mesh; the content of MgO in magnesium oxide is ≥65wt%; the biological calcium material is oyster shell with a mesh number of 100 mesh; The charcoal is corn stalk charcoal.

[0046] The preparation method is as follows: mixing montmorillonite, magnesium oxide, bio-calcium material and bio-char in a formulated amount, and grinding to obtain the soil restoration agent.

Embodiment 2

[0048] This embodiment provides a soil remediation agent for cadmium-contaminated farmland and a preparation method thereof. The soil remediation agent mainly includes the following components in parts by weight: 10 parts of montmorillonite, 15 parts of magnesium oxide, and 20 parts of biological calcium material and 25 parts of biochar; wherein, the montmorillonite is calcium-based montmorillonite with a mesh number of 200 mesh; the content of MgO in magnesium oxide is ≥65wt%; the biological calcium material is sea rainbow shell with a mesh number of 100 mesh; Biochar is wheat straw charcoal.

[0049] The preparation method is the same as in Example 1.

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Abstract

The invention provides a cadmium-polluted farmland soil repairing agent and a preparing method and application thereof. The soil repairing agent mainly comprises following components including, by weight, 5-20 parts of imvite, 5-20 parts of magnesium oxide, 15-45 parts of biological calcium materials and 15-45 parts of charcoal. Through the synergistic effect of the above four components, cadmiumin the farmland is passivated, and the content of free cadmium in the soil is greatly reduced. The soil repairing agent has the beneficial effects of being low in cost, good in repairing effect, safein component, wide in usage range, short in repairing period and the like.

Description

technical field [0001] The invention belongs to the field of soil remediation, and relates to a soil remediation agent for cadmium-contaminated farmland, a preparation method and application thereof. Background technique [0002] Cadmium is one of the most active heavy metal elements in the soil environment. Cadmium in the farmland environment can be absorbed by plants through the roots of crops, and then enriched in plants, and finally enters the human body through the food chain. Cadmium accumulates in the liver and kidneys of the human body, causing damage to kidney tubules and other organs, leading to renal insufficiency, and hindering bone metabolism in the human body, which in turn causes bone lesions and endangers human health. However, there is currently no safe and effective way to eliminate cadmium that enters the human body. In April 2014, the "National Soil Pollution Survey Bulletin" showed that among all pollutants in my country, cadmium was the highest exceedi...

Claims

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Application Information

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IPC IPC(8): B09C1/08C09K17/40
CPCB09C1/08C09K17/40
Inventor 张琢景建元王志新
Owner 北京润鸣环境科技有限公司