Preparation process of long-lasting composite preparation for treating soil cadmium pollution

A preparation process and soil technology, which is applied in the field of preparation of long-acting compound preparations, can solve the problems of large amount of use, and achieve the effect of increasing crop yield and improving crop quality

Inactive Publication Date: 2019-01-18
四川省冶勘设计集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But now silicate is generally prepared as an aqueous solution for application, the effect is basically "one-time", and the amount of use is too large

Method used

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  • Preparation process of long-lasting composite preparation for treating soil cadmium pollution
  • Preparation process of long-lasting composite preparation for treating soil cadmium pollution
  • Preparation process of long-lasting composite preparation for treating soil cadmium pollution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] 1. Using the above formula and preparation method, prepare 18 groups of slow-release compound passivators. Wherein, the effect of using self-made and commercially available fruit shell activated carbons is equivalent, and for the convenience of operation, the fruit shell activated carbons used in the examples are all commercially available.

[0046] The specific preparation parameters of each embodiment are shown in Table 1.

[0047] The concrete preparation parameter of each embodiment of table 1

[0048]

[0049]

[0050]

[0051] 2. The same amount of clear water was used as the blank control group, and the same amount of heavy metal passivator purchased from the market was used as the positive control group 1 (purchased from: Beijing North Yongbang Technology Co., Ltd. Zhengzhou Branch), and the above-mentioned 18 groups of slow-release compound The passivation agent was used for cadmium passivation experiment on soil. The soil used in the experiment is wea...

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Abstract

The invention belongs to the field of soil improvers and in particular relates to a preparation process of a long-lasting composite preparation for treating soil cadmium pollution. According to the specific technical scheme, a passivator comprises the following components in parts by weight: 45-50 parts of fruit shell activated carbon, 35-40 parts of an alkali phosphate chelating agent, 10-20 parts of water-soluble resin and 10-20 parts of water-soluble silicate. The passivator is natural in material and free of secondary pollution to soil, has super strong adsorption and precipitation capabilities for heavy metal cation pollutants such as Cd<2+> and the like in soil, is capable of effectively alleviating or relieving 'cadmium poisoning' of plants, is long lasting in effect and does not need to be repeatedly used within a short time.

Description

technical field [0001] The invention belongs to the field of soil improvers, and in particular relates to a preparation process of a long-acting compound preparation for controlling soil cadmium pollution. Background technique [0002] my country is a large agricultural country. With the continuous development of agricultural production, soil heavy metal pollution, especially cadmium pollution, has become increasingly serious. It is estimated that 12 million tons of grains are polluted by heavy metals every year in my country, causing direct economic losses of more than 20 billion yuan. Moreover, the problem of soil heavy metal pollution is directly related to food safety issues. [0003] Passivation technology is considered to be one of the most effective measures to control soil heavy metal pollution. By changing the form of heavy metals in the soil, especially the form of cadmium, passivating heavy metals in the soil, reducing or avoiding the absorption of heavy metals ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/08
CPCB09C1/08C09K17/40
Inventor 曾冀川孙敏辉张衡廖爽刘轲唐泽德
Owner 四川省冶勘设计集团有限公司
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