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Modified vermiculite mercury removal adsorbent, preparation method and application thereof

A technology of adsorbent and vermiculite, which is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problem of high price of activated carbon mercury removal adsorbents, achieve low price, increase adsorption performance, high efficiency effect

Inactive Publication Date: 2015-09-09
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a modified vermiculite mercury-removing product with low price, simple preparation process and excellent adsorption performance in view of the disadvantages that mercury-containing wastewater will cause great harm to the human body and the environment, and the activated carbon-based mercury-removing adsorbent is expensive. The preparation method of adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Screen the original vermiculite to get a vermiculite sample with a thickness of 0.6-1mm and a particle size of 7-8mm, wash with distilled water, dry it, and set aside.

[0023] 2. Soak the vermiculite in 1 with 25% hydrogen peroxide with a solid-to-liquid ratio of 1:10, stir and mix well, heat and keep warm at 80°C until there is no liquid residue, take it out, heat it with microwave on high heat for 1min, and then grind it until fine Less than 100 mesh spare.

[0024] 3. dissolving chitosan in an acetic acid solution with a volume fraction of 1% at a solid-to-liquid ratio of 1:1000-1:200, making it dissolve slowly and fully to prepare a chitosan solution. Add the vermiculite in 2 into the chitosan solution at a solid-to-liquid ratio of 1:10, fully infiltrate, heat at 50°C for 2 hours, and keep stirring during the process. After the reaction is completed, the mixture is dried and ground to prepare a chitosan-modified vermiculite adsorbent with a chitosan load of 0.0...

Embodiment 2

[0027] 1. Screen the original vermiculite to get a vermiculite sample with a thickness of 0.6-1mm and a particle size of 7-8mm, wash with distilled water, dry it, and set aside.

[0028] 2. Soak the vermiculite in 1 with 25% hydrogen peroxide with a solid-to-liquid ratio of 1:10, stir and mix well, heat and keep warm at 80°C until there is no liquid residue, take it out, heat it with microwave on high heat for min, and grind it until fine Less than 100 mesh spare.

[0029] 3. dissolving chitosan in a 1% acetic acid solution with a solid-to-liquid ratio of 1:200 by volume fraction, making it dissolve slowly and fully to obtain a chitosan solution. Add the vermiculite in 2 into the chitosan solution at a solid-to-liquid ratio of 1:10, fully infiltrate, heat at 50°C for 2 hours, and keep stirring during the process. After the reaction is completed, the mixture is dried and then ground to prepare a chitosan-modified vermiculite adsorbent with a chitosan load of 0.05 g / g.

[0030...

Embodiment 3

[0032] 1. Screen the original vermiculite to get a vermiculite sample with a thickness of 0.6-1mm and a particle size of 7-8mm, wash with distilled water, dry it, and set aside.

[0033] 2. Soak the vermiculite in 1 with 25% hydrogen peroxide with a solid-to-liquid ratio of 1:10, stir and mix well, heat and keep warm at 80°C until there is no liquid residue, take it out, heat it with microwave on high heat for 1min, and then grind it until fine Less than 100 mesh spare.

[0034]3. dissolving chitosan in a 1% acetic acid solution with a solid-to-liquid ratio of 1:200 by volume fraction, making it dissolve slowly and fully to obtain a chitosan solution. Add the vermiculite in 2 into the chitosan solution at a solid-to-liquid ratio of 1:10, fully infiltrate, heat at 50°C for 2 hours, and keep stirring during the process. After the reaction is completed, the mixture is dried and then ground to prepare a chitosan-modified vermiculite adsorbent with a chitosan load of 0.05 g / g.

...

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Abstract

Belonging to the technical field of wastewater treatment, the invention in particular relates to a modified vermiculite mercury removal adsorbent, a preparation method and application thereof. The method includes: taking vermiculite as the main raw material, soaking vermiculite with thickness of 0.6-1mm and a particle size of 7-8mm with 25% hydrogen peroxide, performing heating, then placing the vermiculite in certain power microwave to perform heating, thus obtaining expanded vermiculite, grinding the expanded vermiculite to less than 100 meshes, then conducting further modification with a certain amount of chitosan to obtain the modified vermiculite adsorbent with a chitosan loading capacity of 0.01g / g-0.05g / g, and applying the adsorbent for treatment of mercury-containing wastewater. The modified vermiculite mercury removal adsorbent prepared by the method provided by the invention has the advantages of low price, simple operation and the like, and mercury removal examples prove that the adsorbent has fast adsorption speed and strong adsorption capacity to mercury ions, and can be used for treatment of mercury-containing wastewater with a wide concentration range.

Description

[0001] Invention name [0002] A modified vermiculite mercury-removing adsorbent and its preparation method and application 1 technical field [0003] The invention belongs to the technical field of waste water treatment, and in particular relates to a modified vermiculite mercury-removing adsorbent and a preparation method and application thereof. 2 background technology [0004] China is a big country of mercury consumption and production. There are many sources of mercury pollution. Among them, coal burning, chlor-alkali manufacturing, non-ferrous metal smelting, electronic waste treatment, cement production, batteries, electrolysis and other industries will discharge a large amount of mercury pollution into the environment. Mercury pollution is becoming more and more serious, which poses a major threat to the environment and human beings. Mercury and its derivatives, organic mercury, have attracted global attention as a very serious toxic pollutant because of their char...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 但建明安向静洪成林李洪玲
Owner SHIHEZI UNIVERSITY
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