A transition state iron-based heavy metal immobilization reagent and preparation method thereof

A transition state and heavy metal technology, applied in chemical instruments and methods, agriculture, organic fertilizers, etc., to achieve the effect of easy permanent removal and long-term stable fixation

Active Publication Date: 2020-10-02
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the immobilization of heavy metal ions with zero-valent nano-iron or substrate materials has its disadvantages that cannot be ignored.

Method used

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  • A transition state iron-based heavy metal immobilization reagent and preparation method thereof
  • A transition state iron-based heavy metal immobilization reagent and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of immobilization reagent is as follows:

[0045] 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 to obtain a dispersed powder suspension;

[0046] 2. Add the dispersed powder suspension to the hydrochloric acid solution for acid treatment, wherein the mass percentage concentration of the hydrochloric acid solution is 5%, the stirring temperature is 30°C, and the stirring time is 1h. The mass ratio of the dispersed powder suspension to the hydrochloric acid solution is 1:20;

[0047] 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;

[0048] 4. Disperse the dried powder I in the soluble iron salt solution and keep stirring, wherein the solid-to-liquid mass ratio of powder I to the iron salt solution is 1:20, the pH of the solution ...

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Abstract

The invention discloses a transition state iron-based heavy metal immobilized reagent and a preparation method thereof. The preparation method comprises the following steps of loading nanoscale zero valent iron on the surface of a substrate material; adding the substrate material loading the nanoscale zero valent iron into an acid-deficient solution, and reacting; converting the nanoscale zero valent iron loaded on the surface of the substrate material into transition state iron; washing and drying to obtain the transition state iron-based heavy metal immobilized reagent. According to the immobilized reagent, heavy metals in soil can be stably immobilized for a long time.

Description

technical field [0001] The invention belongs to the field of remediation of soil heavy metal pollution, in particular to a transition state iron-based heavy metal immobilization reagent and a preparation method thereof. Background technique [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 contro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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