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Soil heavy metal curing agent for controlling accumulation of heavy metals of crops and preparation method thereof

A technology of heavy metal and curing agent, applied in chemical instruments and methods, soil conditioning materials, fertilizer mixtures, etc., can solve the problems of no popularization and application value, unfriendly environment, unsatisfactory effect, etc., and achieves low use cost and low price. , make simple effects

Active Publication Date: 2013-08-14
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently reported curing agents or adsorbents mainly include zeolite, diatomaceous earth, sepiolite, bentonite, limestone, and even alkaline coal cinder, but there is no soil heavy metal curing agent or adsorbent for large-scale productive application. The main reason is that either the effect is not ideal, or it is not friendly to the environment, or the cost is too high, and it is not worth popularizing and applying.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Melt 100 parts of polyisoprene into a liquid state at 100°C, 150°C or 300°C, or put it into rapeseed oil or other liquid oils (soybean oil and other vegetable oils) at 100°C, 150°C or 300°C melt into liquid

[0031] 2) Add 300 parts of sulfur into the high-temperature liquid solution obtained in step 1), and boil for 0.5, 1, 1.5 or 3 hours, while adding 50 parts of hydrogen peroxide, and keep stirring at a constant speed;

[0032] 3) After cooling to room temperature, add 300 parts of rapeseed cake to the mixed polymer obtained in step 2), stir and pulverize evenly to obtain a solid mixed polymer;

[0033] 4) Add 150 parts of water, 100 parts of sodium sulfite and 150 parts of quicklime to the solid mixed polymer obtained in step 3), pulverize it evenly again, put the pulverized solid mixed polymer in a steam bath and steam for 1, 2 or 3 hours After cooling, solid mixed polymers are obtained;

[0034] 5) Dry the solid mixed polymer obtained in step 4) at 30°C, 40°C...

Embodiment 2

[0039] 1) Melt 60 parts of natural rubber into a liquid state at 150°C, or put it into rapeseed oil at 150°C to melt into a liquid state;

[0040] 2) Add 50 parts of sodium sulfide into the high-temperature liquid solution obtained in step 1), and boil for 2.5 hours, while adding 20 parts of peroxyformic acid, and keep stirring at a constant speed;

[0041] 3) After cooling to room temperature, add 50 parts of rice straw to the mixed polymer obtained in step 2), stir and pulverize evenly to obtain a solid mixed polymer;

[0042] 4) Add 50 parts of water, 50 parts of zinc powder and 20 parts of sodium hydroxide to the solid mixed polymer obtained in step 3), pulverize it evenly again, put the pulverized solid mixed polymer in a steam bath and steam for 1.5 hours , to obtain a solid mixed polymer after cooling;

[0043] 5) Dry the solid mixed polymer obtained in step 4) at 85°C or expose to the sun until the water content is not higher than 20%;

[0044] 6) Grinding the solid ...

Embodiment 3

[0048] 1) Melt 140 parts of polybutadiene into a liquid state at 150°C, or put it into rapeseed oil or salad oil at 120°C to melt into a liquid state;

[0049] 2) Add 400 parts of sodium hydrosulfide into the high-temperature liquid solution obtained in step 1), and boil for 2.5 hours, while adding 100 parts of peroxybenzoic acid, and keep stirring at a constant speed;

[0050] 3) After cooling to room temperature, add 500 parts of waste paper to the mixed polymer obtained in step 2), stir, and pulverize evenly to obtain a solid mixed polymer;

[0051] 4) Add 400 parts of water, 200 parts of iron powder and 200 parts of potassium hydroxide to the solid mixed polymer obtained in step 3), pulverize it evenly again, put the pulverized solid mixed polymer in a steam bath and steam for 2 hours , to obtain a solid mixed polymer after cooling;

[0052] 5) Dry the solid mixed polymer obtained in step 4) at 20°C or expose to the sun until the water content is not higher than 20%;

[...

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PUM

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Abstract

The invention discloses a soil heavy metal curing agent for controlling accumulation of heavy metals of crops and a preparation method thereof, and belongs to the technical field of a fertilizer. The production method comprises the following materials in parts by weight: 60-140 parts of polyisoprene, polyisoprene analogue or polyisoprene derived polymer, 50-400 parts of sulfocompound, 50-500 parts of organic material in terms of water content of 10%, 0-400 parts of water, 0-100 parts of initiator, 0-200 parts of reducing agent, and 0-200 parts of alkali. The soil heavy metal curing agent disclosed by the invention can reduce the content of cadmium, lead and mercury in a soil solution; and absorption of roots on these heavy metals is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a soil heavy metal curing agent for controlling the accumulation of heavy metals in crops and a preparation method thereof. Background technique [0002] Heavy metals such as cadmium, lead, and mercury are non-essential elements for plants and have toxic effects on plant growth. They are important heavy metal pollutants for crop growth and food safety. These toxic heavy metals accumulate excessively in food, and then enter the food chain, seriously threatening human health. 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 exceeding rate exceeds 10%. Industrial "three wastes", non-ferrous metal mining...

Claims

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Application Information

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IPC IPC(8): C09K17/18C09K101/00
Inventor 邵国胜沈希宏王静
Owner CHINA NAT RICE RES INST
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