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Phosphonic acid terminal hyperbranched dendritic polymer for heavy metal treatment and preparation method thereof

A dendritic and polymer technology, which is applied in the field of phosphonic acid-terminated hyperbranched dendritic polymers for heavy metal treatment and its preparation, can solve the problems of poor acid and alkali washing resistance, large dosage, and poor stability, and meet the requirements of Long-term safety requirements, low cost, and good stability

Active Publication Date: 2018-04-13
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the shortcomings of the existing traditional passivation repair agent, such as large dosage, poor stability, and poor acid and alkali washing resistance, it is designed to have 30 phosphonate groups by using the characteristics of strong chelation ability of phosphonic acid groups on heavy metal ions. The phosphonic acid end group hyperbranched dendritic polymer, which should be used in soil restoration, has good stability to heavy metals in soil, strong ability to resist acid and alkali, and satisfies the long-term safety requirements of soil. Soil heavy metal passivation restoration agent and preparation method thereof It has broad prospects for application in industrial and mining heavy metal soils, rice field restoration and other fields

Method used

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  • Phosphonic acid terminal hyperbranched dendritic polymer for heavy metal treatment and preparation method thereof
  • Phosphonic acid terminal hyperbranched dendritic polymer for heavy metal treatment and preparation method thereof
  • Phosphonic acid terminal hyperbranched dendritic polymer for heavy metal treatment and preparation method thereof

Examples

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Effect test

Embodiment 1

[0041] A kind of heavy metal treatment uses its chemical structural formula of phosphonic acid terminal hyperbranched dendrimers as follows:

[0042]

[0043] A kind of preparation method of heavy metal treatment with phosphonic acid terminal hyperbranched dendritic polymer soil remediation passivation agent, its specific steps are as follows:

[0044] (1) Preparation of terminal double bond star polymer

[0045] Using pentaerythritol tetraacrylate and aminotriphenylamine as raw materials, methanol as a solvent, 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, and the aminotriphenylamine is first The methanol solution is divided into three equal parts, then in the methanol solution of pentaerythritol tetraacrylate, drop the methanol solution of aminotriphenylamine in batches, when the methanol solution of aminotriphenylamine is added dropwise for the first time, th...

Embodiment 2

[0061] A kind of heavy metal treatment uses its chemical structural formula of phosphonic acid terminal hyperbranched dendrimers as follows:

[0062]

[0063] A kind of preparation method of heavy metal treatment with phosphonic acid terminal hyperbranched dendrimers, its concrete steps are as follows:

[0064] (1) Preparation of terminal double bond star polymer

[0065] Using pentaerythritol tetraacrylate and aminotriphenylamine as raw materials, methanol as a solvent, 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, and the aminotriphenylamine is first The methanol solution is divided into three equal parts, then in the methanol solution of pentaerythritol tetraacrylate, drop the methanol solution of aminotriphenylamine in batches, when the methanol solution of aminotriphenylamine is added dropwise for the first time, the temperature of the control dropwise proc...

Embodiment 3

[0077] The application of the phosphonic acid terminal hyperbranched dendrimers for heavy metal treatment is mainly applied to the passivation treatment of heavy metal ions in soil;

[0078] The heavy metal ions in the soil samples are mainly Pb(II), Cr(VI), Cd(II), Cu(II), and the Pb(II), Cr(VI), Cd(II), Cu(II) in the soil The concentration is 0.2g / L;

[0079] The passivation treatment of heavy metal ions in the soil with phosphonic acid terminal hyperbranched dendrimers for heavy metal treatment adopts the method of spraying powder. During the treatment process, the heavy metal treatment is dissolved with phosphonic acid terminal hyperbranched dendrimer In the aqueous solution, its mass concentration is controlled to be 2.5%, then carry out spraying operation, and in the heavy metal ion soil of high content, the spraying quality of phosphonic acid terminal hyperbranched dendrimers for heavy metal treatment is 0.1g / kg, described The spraying temperature is 60°C, and the trea...

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Abstract

The invention relates to a phosphonic acid-terminated hyperbranched dendritic polymer for heavy metal treatment and a preparation method for the phosphonic acid-terminated hyperbranched dendritic polymer. Aminotriphenylamine is adopted as a hyperbranched structural raw material, and the phosphonic acid-terminated hyperbranched dendritic polymer with 30 phosphonic acid radicals, far more than phosphonic acid radicals in an existing soil passivator molecule, is designed by virtue of the characteristic of strong chelating action of a phosphonic acid radical over heavy metal ions, so that the phosphonic acid-terminated hyperbranched dendritic polymer is strong in chelating action, large in molecule space volume, low in migration rate, mild in reaction condition and favorable for large-scale preparation, and has high stabilization performance for heavy metals in soil and high acid and alkali resistance, a long-term safety requirement of the soil is met, and the preparation method has broad application prospect in the fields of soil with industrial and mining heavy metals, paddy field remediation and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection materials, especially has 30 phosphonic acid end groups and has excellent passivation effect on lead, chromium, cadmium and copper heavy metals in soil, and specifically relates to A phosphonic acid terminal hyperbranched dendritic polymer for heavy metal treatment and its preparation method and application have broad prospects in the fields of industrial and mining heavy metal soils, rice field restoration, and the like. Background technique [0002] With the continuous expansion of my country's industrial production scale and the rapid development of urbanization, the soil is suffering from heavy metal pollution in varying degrees, and soil heavy metal pollution has become one of the most important ways to threaten the quality of the environment. Due to its hidden, irreversible and long-term characteristics, soil heavy metal pollution poses a huge potential threat to the ecosyst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00B09C1/08
CPCB09C1/08B09C2101/00C08G83/003C08G83/005
Inventor 戴友芝唐文清曾荣英方淑英
Owner XIANGTAN UNIV
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