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A kind of soil heavy metal activator and preparation method thereof

An activator and heavy metal technology, applied in the field of soil remediation, can solve problems such as high price, unfavorable crop or plant growth, soil structure and composition damage, etc., and achieves the effects of simple operation, low use cost, and strong heavy metal binding ability.

Inactive Publication Date: 2017-10-27
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the activation of soil heavy metals at home and abroad usually uses organic acids or chelating substances, such as oxalic acid, acetic acid, EDTA, etc., but these substances have several limiting factors: 1. Expensive; 2. Damage to soil structure and composition , causing adverse effects on crop or plant growth, etc.

Method used

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  • A kind of soil heavy metal activator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Stir and mix 100 parts of sodium acrylate or / and acrylic acid, 100 parts of sulfur-containing compounds (50 parts of sulfur, 50 parts of sodium sulfide), heat to 140°C, and react for 2 hours to obtain a solid mixture;

[0055] 2) After cooling to normal temperature, use a pulverizer to pulverize the solid mixed reaction product obtained in step 1) to 200 mesh;

[0056] 3) Mix 100 parts of organic materials (20 parts of rapeseed cake, 20 parts of rice straw, 20 parts of barley straw, 20 parts of rape straw), 50 parts of alkaline matter (20 parts of sodium hydroxide, 30 parts of quicklime), reduce Add 50 parts of the product (25 parts of sodium sulfite, 25 parts of sodium thiosulfate) and 50 parts of water to the pulverized product obtained in step 2), and stir evenly to obtain a mixture;

[0057] 4) Cook the mixture in step 3) in a steam bath for 1 hour to obtain a semi-finished activator;

[0058] 5) Place the semi-finished activator obtained in step 4) at 80°C or i...

Embodiment 2

[0061] 1) Stir and mix 110 parts of methyl acrylate and 450 parts of sulfur-containing compounds (100 parts of sodium hydrosulfide, 200 parts of potassium sulfide, and 150 parts of potassium hydrosulfide), heat to 250°C, and react for 3 hours to obtain a solid mixture;

[0062] 2) After cooling to normal temperature, use a pulverizer to pulverize the solid mixed reaction product obtained in step 1) to 300 mesh;

[0063] 3) Mix 550 parts of organic materials (50 parts of corn stalks, 50 parts of sorghum stalks, 100 parts of wood chips, 100 parts of weed straws, 250 parts of milk vetch straws), 250 parts of alkaline materials (150 parts of slaked lime, 100 parts of potassium hydroxide parts), 250 parts of reduced matter (50 parts of sodium hydrosulfite, 50 parts of reduced iron powder, 50 parts of reduced magnesium powder, 100 parts of reduced manganese powder) and 150 parts of water are added to the pulverized matter obtained in step 2), and stirred evenly, Obtain a solid-liqui...

Embodiment 3

[0068] 1) Stir and mix 120 parts of ethyl acrylate and 420 parts of sulfur-containing compound (20 parts of sulfur, 100 parts of sodium sulfide, 100 parts of sodium hydrosulfide, 100 parts of potassium sulfide and 100 parts of potassium hydrosulfide), and heat to 300°C , reacted for 0.5 hours to obtain a solid mixture;

[0069] 2) After cooling to normal temperature, use a pulverizer to pulverize the solid mixed reaction product of step 1) to 150 mesh;

[0070] 3) 800 parts of organic materials (100 parts of sawdust, 100 parts of weed straw, 100 parts of milk vetch straw, 100 parts of alfalfa straw, 100 parts of waste paper, 100 parts of water hyacinth, 200 parts of sugarcane chips), 400 parts of alkaline (100 parts of sodium hydroxide, 100 parts of quicklime, 100 parts of hydrated lime, 100 parts of potassium hydroxide), 260 parts of reducing substances (40 parts of sodium sulfite, 40 parts of sodium thiosulfate, 40 parts of hydrosulfite, 40 parts of reducing iron powder, Ad...

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Abstract

A soil heavy metal activator and a preparation method thereof, belonging to the technical field of soil remediation. The activator is made of the following raw materials in parts by weight: 60-140 parts of activators, 50-500 parts of sulfur-containing compounds, and 0-1000 parts of organic materials, 0-500 parts of alkaline substances converted by sodium hydroxide, 0-500 parts of reduced substances and 0-200 parts of water. The activator has a strong ability to bind heavy metals and is very specific. After being applied to the soil, it can greatly increase the content of heavy metals in the soil solution, especially cadmium, copper, lead and mercury, and can greatly increase the concentration of heavy metals in the soil solution under flooding conditions. It can be directly applied to phytoremediation and leaching remediation of heavy metals in soil. In the application process, the fertilizer is easy to operate, low in usage, low in price, and low in use cost, and is generally applicable to drylands with heavy, medium, and light cadmium pollution in my country.

Description

technical field [0001] The invention belongs to the technical field of soil restoration, and in particular relates to a soil heavy metal activator and a preparation method thereof. Background technique [0002] As a toxic heavy metal, cadmium has become more and more polluting to crops, and the polluted area of ​​farmland is expanding day by day, which has aroused widespread concern in the society. In recent years, due to industrial "three wastes", sewage irrigation, and large-scale application of pesticides and fertilizers, the pollution of heavy metals in farmland has intensified, and the safety of heavy metals in rice has become increasingly prominent. According to the results of the 2002 and 2003 rice quality and safety surveys conducted by the Rice and Product Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture, one of the quality and safety problems of rice is that heavy metals such as cadmium and lead exceed the standard, and the exceedin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/42
CPCC09K17/42C05G3/00
Inventor 邵国胜武慧斌沈希宏安华朱亦君
Owner CHINA NAT RICE RES INST
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