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Composite modifying agent for repairing paddy field soil Cd pollution and preparation method and application method thereof

A technology for improving agent and soil is applied in the field of compound improver for remediating Cd pollution of paddy field soil, which can solve the problems of reducing the bioavailability of heavy metals, and achieve the effects of alleviating toxicity, reasonable collocation and simple process.

Inactive Publication Date: 2015-02-11
娄底市裕德科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic research mainly uses soil amendments to reduce the risk of heavy metal migration to the food chain. The repair mechanism is to change the pH of the soil, increase the adsorption sites or promote the co-precipitation of heavy metal ions and other components of the soil (including the amendment itself), etc. process to reduce heavy metal bioavailability
However, the results of different soil types, different pollution levels, and different types of heavy metals are different, and there are few studies on the remediation of severe cadmium pollution in paddy soil, and the remediation effect of the target soil and crops is required before the technology is actually applied. Verify and evaluate

Method used

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  • Composite modifying agent for repairing paddy field soil Cd pollution and preparation method and application method thereof
  • Composite modifying agent for repairing paddy field soil Cd pollution and preparation method and application method thereof
  • Composite modifying agent for repairing paddy field soil Cd pollution and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A composite improver for repairing Cd pollution in paddy field soil. The raw materials are as follows: 20% lime nitrogen, 15% silicon fertilizer, 25% zeolite powder, 15% calcium magnesium phosphate fertilizer, and 25% organic fertilizer.

[0039] The above products can be purchased from the existing market, such as

[0040] Lime nitrogen was purchased from Ningxia Yuanda Xingbo Chemical Co., Ltd. as a black granular solid, CaCN 2 Mass fraction ≥ 55%, total nitrogen content ≥ 20%;

[0041] Silicon fertilizer was purchased from Zouping Runzi Chemical Co., Ltd., SiO 2 Content ≥ 25%;

[0042] Zeolite powder was purchased from Huashuo Mineral Products Processing Factory in Lingshou County. 2 Content ≥ 25%, P 2 o 5 ≥2.78%;

[0043] Calcium magnesium phosphate fertilizer was purchased from Hubei Zhongxiang Wofeng Fertilizer Co., Ltd., P 2 o 5 ≥15%;

[0044] The organic fertilizer is an organic fertilizer produced by Loudi Yude Technology Co., Ltd., with organic matter...

Embodiment 2

[0056] A composite improver for repairing Cd pollution in paddy field soil. The raw materials are as follows: 15% lime nitrogen, 15% silicon fertilizer, 30% zeolite powder, 10% calcium magnesium phosphate fertilizer, and 30% organic fertilizer.

[0057] The above products can be purchased from the existing market, such as

[0058] Lime nitrogen was purchased from Ningxia Yuanda Xingbo Chemical Co., Ltd. as a black granular solid, CaCN 2 Mass fraction ≥ 55%, total nitrogen content ≥ 20%;

[0059] Silicon fertilizer was purchased from Zouping Runzi Chemical Co., Ltd., SiO 2 Content ≥ 25%;

[0060] Zeolite powder was purchased from Huashuo Mineral Products Processing Factory in Lingshou County. 2 Content ≥ 25%, P 2 o 5 ≥2.78%;

[0061] Calcium magnesium phosphate fertilizer was purchased from Hubei Zhongxiang Wofeng Fertilizer Co., Ltd., P 2 o 5 ≥15%;

[0062] The organic fertilizer is an organic fertilizer produced by Loudi Yude Technology Co., Ltd., with organic matter...

Embodiment 3

[0074] A composite improver for repairing Cd pollution in paddy field soil. The raw materials are as follows: 15% lime nitrogen, 10% silicon fertilizer, 35% zeolite powder, 5% calcium magnesium phosphate fertilizer, and 35% organic fertilizer.

[0075] The above products can be purchased from the existing market, such as

[0076] Lime nitrogen was purchased from Ningxia Yuanda Xingbo Chemical Co., Ltd. as a black granular solid, CaCN 2 Mass fraction ≥ 55%, total nitrogen content ≥ 20%;

[0077] Silicon fertilizer was purchased from Zouping Runzi Chemical Co., Ltd., SiO 2 Content ≥ 25%;

[0078] Zeolite powder was purchased from Huashuo Mineral Products Processing Factory in Lingshou County. 2 Content ≥ 25%, P 2 o 5 ≥2.78%;

[0079] Calcium magnesium phosphate fertilizer was purchased from Hubei Zhongxiang Wofeng Fertilizer Co., Ltd., P 2 o 5 ≥15%;

[0080] The organic fertilizer is an organic fertilizer produced by Loudi Yude Technology Co., Ltd., with organic matter ...

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Abstract

The invention discloses a composite modifying agent for repairing paddy field soil Cd pollution. The composite modifying agent comprises the following raw materials: 10-20% of lime nitrogen, 10-20% of silicon fertilizers, 25-35% of zeolite powder, 5-15% of calcium magnesium phosphate fertilizers, and 25-35% of organic fertilizers. The invention further provides a preparation method and an application method of the preparation. The preparation method of the composite modifying agent is simple, and is easily performed; the absorption of paddies planted on heavy metal-polluted soil to a heavy metal Cd is effectively restrained through the effects of all the components; the composite modifying agent is a novel composite modifying agent with high efficiency, environmental protection and convenience for use, and can achieve the effects of base fertilizers through providing various nutrient elements to the paddies.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal-contaminated soil, in particular to a composite modifier for remediating Cd pollution in paddy field soil, as well as its preparation method and application method. Background technique [0002] Cadmium is a non-essential element for organisms and the human body, and it poses a great threat to human health. It can enter the human body through direct contact with the digestive tract, respiratory tract and skin. Because plants have a strong enrichment effect on the pot, it is easy to form cadmium-containing grains, such as "cadmium rice" (cadmium-containing rice) that enters the human body. Protein binding, and then distributed to various internal organs with the blood, mainly accumulated in the kidney and liver, causing kidney and liver lesions, resulting in neuralgia and anemia. In addition, cadmium can also enter the bone and affect the metabolism of calcium, causing bone soft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08
Inventor 朱艺王韬段红
Owner 娄底市裕德科技有限公司
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