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A kind of soil passivation remediation agent and preparation method thereof

A soil remediation and passivating agent technology, applied in chemical instruments and methods, soil conditioning materials, agricultural machinery and implements, etc., can solve the problems of poor acid and alkali resistance, large dosage, poor stability, etc., and achieve high cost Advantages, low cost, good stability and performance

Active Publication Date: 2018-11-23
衡南县满堂红生态农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the shortcomings of the existing traditional passivation repair agent, such as large dosage, poor stability, and poor acid and alkali washing resistance, and utilize the characteristics of strong chelating effect of phosphonic acid groups on heavy metal ions to design a 30 A soil passivation restoration agent with a phosphonate group provides a soil heavy metal passivation restoration agent with good stability to heavy metals in soil, strong resistance to acid and alkali, and a soil heavy metal passivation restoration agent that meets the long-term safety requirements of the soil and a preparation method thereof. Industrial and mining heavy metal soils, rice field restoration and other fields have broad prospects

Method used

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  • A kind of soil passivation remediation agent and preparation method thereof
  • A kind of soil passivation remediation agent and preparation method thereof
  • A kind of soil passivation remediation agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A kind of passivator for soil restoration, its chemical structural formula is:

[0044]

[0045] A preparation method of soil remediation passivator, its concrete steps are as follows:

[0046] (1) Preparation of star-end double bond dendrimers

[0047] Using trimethylolpropane triacrylate TMPTA and melamine Ma as raw materials, and low-molecular-weight alcohols as solvents, in a reaction device with stirring and condensing reflux, under the protection of nitrogen, the temperature of the reaction system is controlled at -10 ~ 5 ° C First, the alcohol solution of melamine is divided into three equal parts, then the alcohol solution of melamine is added dropwise in batches to the alcohol solution of trimethylolpropane triacrylate TMPTA, when the alcohol solution of melamine is added dropwise for the first time, the control The temperature of the dropping process is -10~-5°C, and the dropping time is 30~60 minutes. When adding the alcohol solution of melamine for the s...

Embodiment 2

[0063] A kind of passivator for soil restoration, its chemical structural formula is:

[0064]

[0065] A preparation method of soil remediation passivator, its concrete steps are as follows:

[0066] (1) Preparation of star-end double bond dendrimers

[0067]Using trimethylolpropane triacrylate TMPTA and melamine Ma as raw materials, and low-molecular-weight alcohols as solvents, in a reaction device with stirring and condensing reflux, under the protection of nitrogen, the temperature of the reaction system is controlled at -10 ~ 5 ° C First, the alcohol solution of melamine is divided into three equal parts, then the alcohol solution of melamine is added dropwise in batches to the alcohol solution of trimethylolpropane triacrylate TMPTA, when the alcohol solution of melamine is added dropwise for the first time, the control The temperature of the dropping process is -10~-5°C, and the dropping time is 30~60 minutes. When adding the alcohol solution of melamine for the se...

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Abstract

The invention relates to a soil passivation restoration agent and a preparation method thereof. Melamine wide in source is used as a core, the cost is low, the characteristic that phosphonyl groups have strong heavy metal ion chelating effect is utilized to design the soil passivation restoration agent provided with 30 phosphonyl radical groups, the phosphonic acid radical groups in the soil passivation restoration agent are far greater than that in existing soil passivation agent molecules in number, and the soil passivation restoration agent is strong in chelating effect, big in molecular space volume and difficult to migrate, has the good performance of stabilizing heavy metals in soil and good acid and alkali resistance capability, meets the long-term safety requirement of the soil, meanwhile is mild in reaction condition, facilitates a large-scale preparation method, is applied to the fields of restoration of industrial and mining heavy metal soil and paddy field and the like and has wide prospect.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, in particular to the remediation of lead, chromium, cadmium and copper heavy metal contaminated soil, and specifically relates to a soil passivation remediation agent and a preparation method thereof. Background technique [0002] Soil is the main material basis for human survival and the foundation of life; however, with the continuous expansion of industrial production scale and the rapid development of urbanization in our country, soil is suffering from heavy metal pollution to varying degrees. , causing many heavy metals such as lead, cadmium, copper, mercury and other heavy metals to enter the atmosphere, water and soil, causing serious environmental pollution. Due to its hidden, irreversible and long-term characteristics, soil heavy metal pollution poses a huge potential threat to the ecosystem and affects the health of humans and animals through the food chain. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09K17/18C09K101/00
CPCC08G83/003C08G83/004C09K17/18C09K2101/00
Inventor 曾荣英唐文清方淑英
Owner 衡南县满堂红生态农业有限公司
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