Preparation method and application of adsorbent for adsorbing heavy metal ions

A technology for adsorbing heavy metals and heavy metal ions, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of limited adsorption capacity of three-dimensional solid viscous materials and cannot meet the needs.

Inactive Publication Date: 2020-10-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of viscous materials in thre

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method for an efficient adsorbent for adsorbing heavy metal ions, comprising the steps of:

[0029] S1. Hydrothermal reaction for sodium ion intercalation

[0030] Mix 0.3 g of vermiculite with 100 ml of saturated sodium chloride solution and place it in a hydrothermal reactor, then heat it at 110°C for 100 minutes, after the constant temperature is finished and naturally drop to room temperature, filter the reaction product and rinse with deionized water Wash twice, and then wash once with absolute ethanol to obtain the vermiculite after sodium ion intercalation.

[0031] S2. Hydrothermal reaction for lithium ion intercalation

[0032] The above-mentioned vermiculite after sodium ion intercalation is mixed with a lithium chloride solution with a concentration of 2mol / L and a volume of 100ml, and then placed in a hydrothermal reactor, and then heated at 110°C for 100 minutes, and the constant temperature is naturally lowered to room temperature Afterward...

Embodiment 2

[0039] A preparation method for an efficient adsorbent for adsorbing heavy metal ions, comprising the steps of:

[0040] S1. Hydrothermal reaction for sodium ion intercalation

[0041] Mix 0.3 g of vermiculite with 100 ml of saturated sodium chloride solution and place it in a hydrothermal reactor, then heat it at 120°C for 110 minutes, after the constant temperature is finished and naturally drop to room temperature, filter the reaction product and rinse with deionized water Wash twice, and then wash once with absolute ethanol to obtain the vermiculite after sodium ion intercalation.

[0042] S2. Hydrothermal reaction for lithium ion intercalation

[0043] The above-mentioned vermiculite after sodium ion intercalation is mixed with a lithium chloride solution with a concentration of 2mol / L and a volume of 100ml, then placed in a hydrothermal reactor, and then heated at 120°C for 110 minutes, and the constant temperature is naturally lowered to room temperature Afterwards, t...

Embodiment 3

[0050] A preparation method for an efficient adsorbent for adsorbing heavy metal ions, comprising the steps of:

[0051] S1. Hydrothermal reaction for sodium ion intercalation

[0052] Mix 0.3 g of vermiculite with 100 ml of saturated sodium chloride solution and place it in a hydrothermal reactor, then heat it at 130°C for 120 minutes, after the constant temperature is finished and naturally drop to room temperature, filter the reaction product and rinse with deionized water Wash twice, and then wash once with absolute ethanol to obtain the vermiculite after sodium ion intercalation.

[0053] S2. Hydrothermal reaction for lithium ion intercalation

[0054] The above-mentioned vermiculite after sodium ion intercalation is mixed with a lithium chloride solution with a concentration of 2mol / L and a volume of 100ml, then placed in a hydrothermal reactor, and then heated at 130°C for 120 minutes, and the constant temperature is naturally lowered to room temperature Afterwards, t...

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PUM

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Abstract

The invention discloses a preparation method and application of an adsorbent for adsorbing heavy metal ions. A dispersion of two-dimensional nanosheets is obtained through alkali metal ion intercalation, liquid phase stripping and centrifugal screening of a layered clay material used as a raw material, and is used for efficiently adsorbing the heavy metal ions in sewage. The stripped two-dimensional nanosheets are large in acting area and high in adsorption capacity and are dispersed into water to prepare the adsorbent. The adsorbent has the advantages of large adsorption capacity, good stability, wide adaptive temperature range and the like, and can effectively remove common heavy metal ions (nickel, cobalt and cadmium) in sewage. The preparation method of the adsorbent has the advantagesof environmental friendliness, safety, easiness in operation and the like. In addition, the clay material is low in price in nature and easy to obtain, and the preparation cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation and improvement of adsorbents, and more specifically relates to a preparation method and application of an efficient adsorbent for adsorbing heavy metal ions. Background technique [0002] Industrial wastewater often contains a large amount of heavy metal ions, such as nickel, cobalt, cadmium and so on. If it is discharged directly without treatment, it will cause great harm to the environment and human body. Taking cadmium ions as an example, cadmium poisoning can cause itai-itai disease. Japan has reported many incidents of iti-itai disease caused by ingesting cadmium-contaminated water. It can be seen that the treatment of heavy metal ions in sewage is one of the environmental issues that we should pay attention to. However, the common sewage treatment system has complex pipelines, large floor space and high cost. If materials that can effectively adsorb heavy metal ions can be found, the...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/04B01J20/12C02F1/281C02F2101/20
Inventor 柴丰圆曾卓于金瀛
Owner DALIAN UNIV OF TECH
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