Passivant for lowering farmland soil effective state heavy metal content and preparation method and application

A passivating agent, effective state technology, applied in the agricultural field, can solve problems such as changing soil functions, and achieve the effects of improving crop quality, easy application and operation, and simple preparation process

Inactive Publication Date: 2017-08-25
ELION ECOLOGICAL RESTORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, simply adding a passivator will affect the composition and structure of the

Method used

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  • Passivant for lowering farmland soil effective state heavy metal content and preparation method and application
  • Passivant for lowering farmland soil effective state heavy metal content and preparation method and application
  • Passivant for lowering farmland soil effective state heavy metal content and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] The present invention also provides a method for preparing a passivating agent, the method comprising: mixing the raw materials used for preparing the passivating agent according to the ratio of the passivating agent of the present invention to obtain an effective heavy metal content in farmland soil Deactivator.

[0024] According to the present invention, in order to improve the adsorption performance of the passivator, it is preferable to pulverize the raw materials and pass through a 30-40 mesh sieve before mixing.

[0025] The present invention also provides the application of the passivating agent provided by the present invention to reduce the effective heavy metal content of farmland soil.

[0026] According to the present invention, the application method of the passivating agent is well known to those skilled in the art. For example, the application may include: applying the passivating agent to heavy metal contaminated farmland soil after plowing, and plowing again....

Example Embodiment

[0033] Example 1

[0034] In this example, a certain farmland contaminated soil in Changping District, Beijing was selected for the experiment. The experiment set up a blank control group, numbered CK, and set up 6 experimental groups to use the passivation agent of the present invention to repair and reduce the effective heavy metals in the soil. Content, numbered R1, R2, R3, R4, R5 and R6, a total of 7 groups. Each group of experiments was repeated twice, and the experimental results were averaged twice. Therefore, this embodiment sets 14 experimental plots, each with an area of ​​1 mu, repeats a set of experiments for every two plots, and averages the data.

[0035] The application method of the passivation agent is strip application, and the application amount (kg / mu) and application ratio are shown in Table 1.

[0036] After the farmland soil is passivated, soil samples are randomly collected in each plot to detect the content of available heavy metals in the soil. Take the av...

Example Embodiment

[0039] Example 2

[0040] In this example, a certain farmland contaminated soil in Changsha City, Hunan Province was selected for the experiment. The experiment set up a blank control group, numbered CK, and set up 6 experimental groups to use the passivation agent of the present invention to repair and reduce the effective heavy metals in the soil Content, numbered R1, R2, R3, R4, R5 and R6, a total of 7 groups. Each group of experiments was repeated twice. Similarly, in order to avoid the contingency of the experiment, a total of 14 experimental plots were set up, each with an area of ​​1 mu, a set of experiments were repeated for every two plots, and the data were averaged.

[0041] The application method of the passivator is strip application, and the application amount (kg / mu) and application ratio are shown in Table 2.

[0042] After the farmland soil is passivated, soil samples are randomly collected in each plot to detect the content of available heavy metals in the soil. T...

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Abstract

The invention discloses a passivant for lowering the farmland soil effective state heavy metal content and a preparation method and application thereof. The passivant is prepared from, by weight, 100 parts of zeolite, 60-120 parts of red mud, 20-50 parts of cornstalk powder, 0-20 parts or more of garlic bolts and 0-10 parts or more of hydroxyapatite. The passivant can effectively lower the farmland soil effective state heavy metal content.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a passivator for reducing the content of available heavy metals in farmland soil, a preparation method and application thereof. Background technique [0002] With the massive development and utilization of resources, the rapid development of industrialization and the widespread use of various chemical products, pesticides and fertilizers, pollutants containing heavy metals enter the environment through various channels, causing soil, especially farmland soil, to be increasingly polluted by heavy metals. According to the "National Soil Pollution Survey Bulletin", the total rate of soil points exceeding the standard in the country is 16.1%. From the perspective of land type, the rate of point exceeding the standard in cultivated land is 19.4%. It accounted for 82.8% of all over-standard points, among which the over-standard rates of cadmium and lead pollutant points were 7.0% and 1.5% re...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08
CPCC09K17/40B09C1/08C09K2101/00
Inventor 李琼郑子健张海欧董小龙和利钊甘平王宝驹赵晋灵周广福王瑞丰
Owner ELION ECOLOGICAL RESTORATION
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