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Immobilized reagent for heavy metal pollution of soil and preparing method thereof

A technology for heavy metals and reagents, which is applied in the field of soil heavy metal pollution immobilization reagents and their preparation, can solve the problems of re-release of heavy metals, etc., and achieve the effect of being convenient for permanent removal and long-term stable fixation.

Inactive Publication Date: 2016-08-10
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that current immobilized reagents are easy to re-release heavy metals with environmental changes, and propose an immobilized reagent that can efficiently, permanently and stabilize soil heavy metal pollution

Method used

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  • Immobilized reagent for heavy metal pollution of soil and preparing method thereof
  • Immobilized reagent for heavy metal pollution of soil and preparing method thereof

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Experimental program
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Effect test

Embodiment 1

[0042] The preparation method of immobilization reagent is as follows:

[0043] 1. Disperse the attapulgite powder in deionized water and treat it with ultrasonic waves for 5 minutes, wherein the mass ratio of solid to liquid is 1:20;

[0044] 2. Add the dispersed powder suspension to the hydrochloric acid solution for acid treatment, wherein the mass concentration of the hydrochloric acid solution is 5%, the stirring temperature is 60°C, the stirring time is 4h, and the volume ratio of the powder suspension to the hydrochloric acid solution is 1:2;

[0045]3. The powder after acid treatment was washed twice with deionized water and absolute ethanol respectively, filtered and dried, and the drying temperature was 30°C;

[0046] 4. Disperse the dried powder I in the soluble iron salt solution, and transfer the mixed solution to a high-pressure reactor for reaction, wherein the solid-to-liquid mass ratio of powder I to the iron salt solution is 1:20, and the pH of the solution i...

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Abstract

The invention discloses a soil heavy metal pollution immobilization reagent and a preparation method thereof. Nano zero-valent iron is loaded on the crystal lattice and the surface of the base material, and then the nano-zero-valent iron on the surface of the base material is removed by acid solution treatment, and remains in the crystal lattice of the base material. The nanometer zero-valent iron immobilized in the grid is washed and dried to obtain an immobilized reagent. The immobilization reagent of the invention can efficiently, permanently and stably fix heavy metals in residue state.

Description

technical field [0001] The invention belongs to the field of soil heavy metal pollution restoration, in particular to a soil heavy metal pollution immobilization reagent and a preparation method thereof. technical background [0002] As the world's population continues to grow, food production and security issues are imminent, and China's agriculture is the first to bear the brunt. Farmland pollution is an important restrictive factor for high grain production, resulting in a decline in comprehensive agricultural production capacity, which has affected the sustainability of agricultural production in my country, the quality of agricultural products, and the safety of the national ecological environment, and has aroused widespread concern from the public. Among the many factors of farmland pollution, chemical fertilizers, pesticides, and sewage irrigation are the main causes of farmland pollution. Due to the difficulty and harm of heavy metal pollution control, heavy metal p...

Claims

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Application Information

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IPC IPC(8): C09K17/02C09K17/08
CPCC09K17/02C09K17/08
Inventor 何曦叶明强
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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