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A soil conditioner for fast and long-term restoration of farmland cadmium pollution and preparation method thereof

A soil conditioner, cadmium pollution technology, applied in soil conditioning materials, chemical instruments and methods, agriculture, etc., can solve the problems of reducing migration and toxicity, achieve rapid and long-term repair, improve yield and quality, and product applicability wide effect

Active Publication Date: 2021-05-28
TIANJIN CEMENT IND DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the present invention provides a soil conditioner for quick and long-term restoration of farmland cadmium pollution and a preparation method thereof. The soil conditioner can not only rapidly passivate heavy metal cadmium in polluted farmland soil, but also reduce its migration and toxicity, and can slowly release ions and groups that form solid precipitation substances with heavy metal cadmium for a long time, so as to avoid the repair failure problem caused by environmental changes, and also avoid soil compaction and salt formation caused by long-term heavy metal passivation Dirt and other issues

Method used

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  • A soil conditioner for fast and long-term restoration of farmland cadmium pollution and preparation method thereof
  • A soil conditioner for fast and long-term restoration of farmland cadmium pollution and preparation method thereof
  • A soil conditioner for fast and long-term restoration of farmland cadmium pollution and preparation method thereof

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preparation example Construction

[0053] In order to prepare the soil conditioner of the present invention, the present invention also provides a preparation method, the method comprising:

[0054] (1) First, mix the silicon calcium potassium magnesium fertilizer and sodium carbonate uniformly according to the ratio of 10:1 by weight, and then spray granulate to control the particle size to be 1.0-4.75mm, the water content to be less than 3%, and the particle strength to be 10-30N; Prepare granular material A;

[0055] (2) Then mix the anhydrous calcium sulfoaluminate and sodium carbonate evenly according to the weight ratio of 5:1, then spray granulate, control the particle size to be 1.0-4.75mm, the water content is less than 3%, and the particle strength is 10-30N ; Granular material B is obtained;

[0056] (3) Mix the alum and the remaining sodium carbonate evenly, spray and granulate, control the particle size to be 1.0-4.75mm, the moisture is less than 3%, and the particle strength is 10-30N; Granular m...

Embodiment 1

[0063] Embodiment 1 prepares the soil conditioner T1 of rapid and long-term restoration of farmland cadmium pollution:

[0064] S1. First prepare granular material A: weigh 60 kg of silicon calcium potassium magnesium fertilizer and 6 kg of sodium carbonate, mix them evenly in a Y-type mixer, and then spray and granulate them in a granulator to control the particle size of the finished product to 1-4.75 mm. Moisture is less than 3%, particle strength 10-30N;

[0065] S2. Then prepare granular material B, weigh 10kg of anhydrous calcium sulfoaluminate and 2kg of sodium carbonate, mix them uniformly in a Y-type mixer, and then spray and granulate in a granulator to control the particle size of the finished product to 1-4.75mm , moisture less than 3%, particle strength 10-30N;

[0066] S3, prepare granular material C again, weigh 15kg of alum and 7kg of sodium carbonate, mix uniformly in a Y-type mixer, then spray and granulate in a granulator, control the particle size of the f...

Embodiment 2

[0068] Embodiment 2 prepares the soil conditioner T2 of rapid and long-term restoration of farmland cadmium pollution:

[0069] S1. First prepare granular material A, weigh 65kg of silicon calcium potassium magnesium fertilizer and 6.5kg of sodium carbonate, mix them evenly in a Y-type mixer, and then spray and granulate them in a granulator to control the particle size of the finished product to 1-4.75mm , moisture less than 3%, particle strength 10-30N;

[0070] S2. Then prepare granular material B, weigh 10kg of anhydrous calcium sulfoaluminate and 2kg of sodium carbonate, mix them uniformly in a Y-type mixer, and then spray and granulate in a granulator to control the particle size of the finished product to 1-4.75mm , moisture less than 3%, particle strength 10-30N;

[0071] S3, prepare granular material C again, take by weighing alum 10kg, sodium carbonate 6.5kg, mix uniformly in Y type mixer, then spray granulation in granulator, control finished product particle diame...

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Abstract

The invention belongs to the technical field of agricultural soil conditioner production, and in particular relates to a soil conditioner for fast and long-term restoration of farmland cadmium pollution and a preparation method thereof; according to the weight ratio of raw materials, the soil conditioner comprises: 60-80 parts of silicon calcium potassium Magnesium fertilizer; 5‑10 parts calcium sulfoaluminate anhydrous; 5‑15 parts alum; 10‑15 parts sodium carbonate. The silicon-calcium-potassium-magnesium fertilizer contains nutrients absorbable by plants, and the mass percentage of the nutrients is: available silicon ≥ 30%, available calcium ≥ 28%, available magnesium ≥ 4% and available potassium ≥ 5%. The soil conditioner can not only quickly passivate the heavy metal cadmium in polluted farmland soil, reduce its mobility and toxicity, but also slowly release the ions and groups that form solid precipitation substances with the heavy metal cadmium for a long time, so as to avoid environmental changes. The problem of repair failure also avoided problems such as soil compaction and salinization caused by long-term heavy metal passivation agents.

Description

technical field [0001] The invention belongs to the technical field of agricultural soil conditioner production, and in particular relates to a soil conditioner for fast and long-term restoration of farmland cadmium pollution and a preparation method thereof. Background technique [0002] With the development of my country's industrialization, heavy metal pollution in farmland soil is a serious environmental problem facing our country. According to the National Soil Pollution Survey Bulletin, the rate of cadmium pollution points exceeding the standard exceeds 7%, ranking first among all heavy metal pollution. The heavy metal cadmium has caused great harm due to its high toxicity, high mobility and hidden pollution. Cadmium ions accumulate in the edible parts of plants through root absorption and in vivo transport, and enter the food chain to be ingested by the human body, seriously damaging the health of the body. Soil cadmium pollution has posed a great threat to the safety...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/08C09K101/00
CPCC09K17/08C09K2101/00
Inventor 何小龙吴秋生李小燕吴锡林万夫伟梁世栋
Owner TIANJIN CEMENT IND DESIGN & RES INST
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