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Natural medical stone contained agricultural soil heavy metal passivator and preparation method thereof

A heavy metal passivator, medical stone technology, applied in chemical instruments and methods, agriculture, soil conditioning materials, etc., can solve the problem of reducing bioavailability and mobility, affecting soil chemical properties and fertility, and affecting soil availability. To achieve the effect of improving the ability of water and fertilizer retention, beneficial to growth and low cost

Inactive Publication Date: 2018-12-28
哈密国家农业科技园区管委会
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional research method is to add chemical substances such as slaked lime and calcium silicate to the soil. By adding these substances, a series of reactions such as precipitation, adsorption, ion exchange, humification and redox will occur with heavy metal elements, which will significantly reduce its biological Effectiveness and mobility can significantly slow down the toxic effect of heavy metal pollution on plant growth, and greatly reduce the absorption and accumulation of heavy metals by plants. Different degrees of impact will also affect the usability of the soil after restoration, and may cause secondary pollution. Therefore, we have designed a natural medical stone agricultural soil heavy metal passivator and its preparation method to solve the above problems. question

Method used

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  • Natural medical stone contained agricultural soil heavy metal passivator and preparation method thereof

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Effect test

Embodiment 1

[0028] A natural medical stone agricultural soil heavy metal deactivator, comprising the following raw materials in parts by weight: 20 parts of clay minerals, 25 parts of quicklime, 20 parts of medical stone, 10 parts of natural phosphate fertilizer, 5 parts of oyster shells and 2 parts of red mud.

[0029] A preparation method of a natural medical stone agricultural soil heavy metal deactivator, comprising the following steps,

[0030] S1, preparation of raw materials: weigh clay minerals, quicklime, medical stone, phosphate fertilizer, oyster shells and red mud according to the proportion of each component;

[0031] S2, calcining treatment of raw materials: calcining the oyster shells in S1 at 650° C. until they are burned to ashes to obtain calcined powder;

[0032] S3, pulverization of raw materials: add the limestone, medical stone, sepiolite and zeolite weighed in S1 into a pulverizer, pulverize and mix, pulverize for 20 minutes, and sieve to obtain a powdery mixture; ...

Embodiment 2

[0035] A natural medical stone agricultural soil heavy metal deactivator, comprising the following raw materials in parts by weight: 25 parts of clay minerals, 27 parts of quicklime, 22 parts of medical stone, 15 parts of natural phosphate fertilizer, 6 parts of oyster shells and 3 parts of red mud.

[0036] A preparation method of a natural medical stone agricultural soil heavy metal deactivator, comprising the following steps,

[0037] S1, preparation of raw materials: weigh clay minerals, quicklime, medical stone, phosphate fertilizer, oyster shells and red mud according to the proportion of each component;

[0038] S2, calcining treatment of raw materials: calcining the oyster shells in S1 at 680° C. until they are burned to ashes to obtain calcined powder;

[0039] S3, pulverization of raw materials: add the limestone, medical stone, sepiolite and zeolite weighed in S1 into the pulverizer, pulverize and mix, pulverize for 25 minutes, and sieve to obtain a powdery mixture;...

Embodiment 3

[0042] A natural medical stone agricultural soil heavy metal deactivator, comprising the following raw materials in parts by weight: 30 parts of clay minerals, 27 parts of quicklime, 24 parts of medical stone, 20 parts of natural phosphate fertilizer, 7 parts of oyster shells and 4 parts of red mud.

[0043] A preparation method of a natural medical stone agricultural soil heavy metal deactivator, comprising the following steps,

[0044] S1, preparation of raw materials: weigh clay minerals, quicklime, medical stone, phosphate fertilizer, oyster shells and red mud according to the proportion of each component;

[0045] S2, calcining treatment of raw materials: calcining the oyster shells in S1 at 700°C until they are burned to ashes to obtain calcined powder;

[0046] S3, pulverization of raw materials: add the limestone, medical stone, sepiolite and zeolite weighed in S1 into a pulverizer, pulverize and mix, pulverize for 30 minutes, and sieve to obtain a powdery mixture;

...

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Abstract

The invention discloses a natural medical stone contained agricultural soil heavy metal passivator and a preparation method thereof. The metal passivator comprises the following raw materials in partsby weight: 20-40 parts of clay minerals, 25-35 parts of quicklime, 20-30 parts of medical stone, 10-30 parts of natural phosphate fertilizer, 5-10 parts of oyster shells and 2-6 parts of red mud. Thepreparation method comprises the following steps: S1, preparing the raw materials; S2, calcining the raw materials; S3, crushing the raw materials; S4, mixing the raw materials. The metal passivatorcan passivate and repair various heavy metals, especially lead and cadmium, greatly increases the yield of crops, improves quality of soil, and is more beneficial to the growth of crops; the preparation method is simple in preparation process, easy to operate and low in cost. Therefore, the passivator is suitable for batch production.

Description

technical field [0001] The invention relates to the technical field of metal deactivators, in particular to a natural medical stone agricultural soil heavy metal deactivator and a preparation method thereof. Background technique [0002] With the rapid advancement of China's industrialization and urbanization process, soil heavy metal pollution has become increasingly prominent, and the "three wastes" of chemical, mining, and smelting industries, urban traffic, atmospheric deposition, livestock and poultry manure, urban sludge, pesticides and fertilizers have become major sources of pollution. Due to the pollution of farmland soil by heavy metals, the problem of heavy metal pollution of agricultural products produced on polluted farmland has become increasingly prominent. The content of heavy metals in China's soil exceeds the background value of the soil, especially the pollution of Cd and Pb is serious. [0003] The traditional research method is to add chemical substance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/08C09K109/00C09K101/00
CPCC09K17/08C09K2101/00C09K2109/00
Inventor 张豫胡明钰蔡德所李志刚郝永河石荣媛张鹏飞单兴斌
Owner 哈密国家农业科技园区管委会
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