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Cadmium soil conditioner
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A technology of soil conditioner and conditioner, which is applied in the direction of soil conditioning materials, organic fertilizers, fertilizer mixtures, etc., can solve problems such as difficult to greatly reduce the content of active cadmium ions, high material application costs, and unstable governance effects, etc., to achieve improved Long-term effect, convenient operation and stable effect
Inactive Publication Date: 2019-09-20
CHANGSHA SHUANGHONG AGRI TECH CO LTD
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Abstract
Description
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Problems solved by technology
[0004] In the process of popularizing soil conditioners, it was found that the soil conditioners produced by a single technical principle have unstable treatment effects in the process of rice planting, mainly because the soil conditioners produced by different technical principles play different roles in different farmland soils. The efficiency is limited; for example, in sandy soils, the activity of cadmium ions is particularly high, and it is difficult to significantly reduce the content of active cadmium ions no matter whether the adsorption-type soil conditioner or the competitive soil conditioner is applied. Apply a large amount of soil conditioner; the amount of application is too large, and the general soil conditioner needs to be applied more than 200kg / mu for morning and evening rice. In the process of agricultural production, it is difficult to promote and the cost of material application is high
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Embodiment 1
[0015] The invention provides a cadmium soil conditioner, which comprises the following components:
[0016] Measured in mass percent: SiO 2 >9%, CaO>28%, MgO>9%, Zn+Mn+Fe>1.5%, organic matter>5%.
[0017] The SiO 2 , CaO, and MgO are all calcined twice to improve the adsorption activity of micropores, so as to ensure the adsorption effect of calcium ions, silicon ions, and magnesium ions on cadmium ions.
[0018] The conditioner was ground to a fineness of 100 mesh.
[0019] The overall pH of the conditioner is between 7-10.
Embodiment 2
[0021] The invention provides a cadmium soil conditioner, which comprises the following components:
[0022] Measured in mass percent: SiO 2 >9%, CaO>28%, MgO>9%, Zn+Mn+Fe>1.5%, organic matter>5%.
[0023] The SiO 2 , CaO, and MgO are all calcined twice to improve the adsorption activity of micropores, so as to ensure the adsorption effect of calcium ions, silicon ions, and magnesium ions on cadmium ions.
[0024] The conditioner was ground to a fineness of 50 mesh.
[0025] The overall pH of the conditioner is between 7-10.
Embodiment 3
[0027] The invention provides a cadmium soil conditioner, which comprises the following components:
[0028] Measured in mass percent: SiO 2 >9%, CaO>28%, MgO>9%, Zn+Mn+Fe>1.5%, organic matter>5%.
[0029] The SiO 2 , CaO, and MgO are all calcined twice to improve the adsorption activity of micropores, so as to ensure the adsorption effect of calcium ions, silicon ions, and magnesium ions on cadmium ions.
[0030] The conditioner was ground to a fineness of 150 mesh.
[0031] The overall pH of the conditioner is between 7-10.
[0032] With reference to the above-mentioned Example 1, when using this soil conditioner to apply 100kg / mu in early rice, the control effect is the best, the cadmium reduction effect in early rice reaches 52%, and the cadmium reduction effect in late rice reaches 56.3%, and the control effect can reach 300kg / mu on the market. Restorative governance effects of other similar products.
[0033] In summary, the present invention combines the technical ...
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Abstract
The invention discloses a cadmiumsoil conditioner, and belongs to the field of soil conditioners. The cadmiumsoil conditioner comprises, in percentage by mass, larger than 9% of SiO2, larger than 28% of CaO, larger than 9% of MgO, larger than 1.5% of Zn+Mn+Fe and larger than 5% of organic matters. According to the cadmiumsoil conditioner, by combining the technical mechanisms of ion competition, CaO acid content adjustment, micropore adsorption and the like and adding the organic matters to a formula at the same time, the purpose of remediation is achieved, the soil structure can be improved at the same time, and long residual action of a remediation effect of the soil conditioner is improved. By applying the formula, the soil conditioner can be suitable for more soil types, and has a more stable effect, the application amount is reduced, and operation is convenient.
Description
technical field [0001] The invention belongs to the technical field of soil conditioners, in particular to a cadmium soil conditioner. Background technique [0002] At present, domestic heavy metal contaminated soil remediation technologies mainly include phytoremediation, electrodynamic remediation, leaching, guest soil, adsorption fixation, complexation extraction, etc. Although these improved methods have the advantages of thoroughness and stability, they are often The cost is high, the amount of engineering is huge, the treatment period is long, and the original physical and chemical structure of the soil will be broken, with many side effects. Therefore, it is not suitable for treating heavy metalpollution in large-scale rice fields. [0003] In the field of remediation of heavy metalpollution in paddy fields, the current main treatment method is the application of soil conditioners. Popularize and apply more widely used soil conditioners, some of which are CaO to ad...
Claims
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Application Information
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