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Composition used for controlling loss of phosphorus in soil and preparation method of composition

A composition and soil technology, applied in the direction of fertilizer mixture, soil conditioning materials, chemical instruments and methods, etc., can solve the problems of poor application effect, unfavorable large-scale popularization and application, and large amount of phosphorus leaching, so as to achieve environmental protection and large-scale The effect of large-scale promotion and application and good application effect

Inactive Publication Date: 2012-08-01
重庆绿色智能技术研究院
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Problems solved by technology

Although red mud has a certain fixation effect on phosphorus, it can be used to control the loss of phosphorus in the soil, but the application effect of red mud alone is poor, and the amount of phosphorus leached in the soil is large, which is not conducive to its large-scale application

Method used

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  • Composition used for controlling loss of phosphorus in soil and preparation method of composition

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preparation example Construction

[0034] The present invention also provides a method for preparing a composition for controlling phosphorus loss in soil, comprising the following steps:

[0035] The red mud and compounding agent are mixed to obtain a composition for controlling phosphorus loss in soil, and the compounding agent is an acidic substance containing calcium or iron.

[0036] The present invention mainly uses red mud and acidic substances containing calcium or iron as raw materials to prepare a composition for controlling phosphorus loss in soil. The composition for controlling phosphorus loss in soil not only has better application effect, but also can be prepared The method is simple and convenient, and its price is low, and it is beneficial to environmental protection.

[0037] In the present invention, the red mud and acid substances containing calcium or iron are preferably mixed by using a stirring machine to obtain a composition for controlling phosphorus loss in soil.

[0038]The present i...

Embodiment 1

[0056] According to the mass ratio of 1:1, the red mud and phosphogypsum are mixed with a stirring machine to obtain a composition for controlling phosphorus loss in soil with a particle size of less than 2 mm.

Embodiment 2

[0059] According to the mass ratio of 1:1, the red mud and ferrous sulfate are mixed with a stirring machine to obtain a composition for controlling phosphorus loss in soil with a particle size of less than 2 mm.

[0060] After obtaining the composition for controlling the loss of phosphorus in the soil, the application of phosphorus in the fixed soil of the obtained composition is evaluated according to the experimental method of Example 1 with the application rate of 10 tons / ha, 30 tons / ha and 50 tons / ha respectively Effect, the leaching amounts of phosphorus in the soil were 3.81 mg / kg, 2.43 mg / kg and 1.98 mg / kg respectively, the results are shown in Table 1.

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Abstract

The invention provides a composition used for controlling loss of phosphorus in soil. The composition comprises red mud and a complex mixture, wherein the complex mixture is an acidic substance containing calcium or iron. According to the invention, the acidic substance containing calcium or iron is used as the complex mixture, and the complex mixture is compounded with the red mud; as the complex mixture is the acidic substance, the complex mixture can neutralize the alkalinity of the red mud so that phosphorus can be well fixed; meanwhile, the complex mixture can provide calcium ions or iron ions and further promote the fixation of the phosphorus through the synergistic effect of the red mud, thus the loss of the phosphorus in the soil is well controlled; and the composition used for controlling the loss of the phosphorus in the soil has good application effect. In addition, the composition used for controlling the loss of the phosphorus in the soil is low in cost and beneficial to environmental protection. The preparation method is convenient and easy to operate and beneficial to large-scale popularization and application. The invention also provides the preparation method of the composition used for controlling the loss of the phosphorus in the soil.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a composition for controlling phosphorus loss in soil and a preparation method thereof. Background technique [0002] With the strengthening of environmental pollution control, the point source pollution of my country's water environment has been effectively controlled and treated, and the quality of the water environment has been improved to a certain extent, but the degree of improvement is generally not obvious. The reason is that after point source pollution has been effectively controlled, non-point source pollution has become a new source of pollution, especially the water environment pollution caused by agricultural non-point source pollution has not received more attention. For example, the use of phosphorus fertilizers in agriculture can promote crop growth , improve crop yield and quality, but continuous high application of phosphorus fertilizer will lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06
Inventor 梁震徐愿坚刘志梅杨舒
Owner 重庆绿色智能技术研究院
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