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Preparation method of carbon quantum dot modified activated carbon heavy metal adsorption material

A technology of carbon quantum dots and adsorption materials, applied in the field of preparation of carbon quantum dots modified activated carbon heavy metal adsorption materials, can solve the problems of high cost, environmental pollution, short life, etc., achieve stable performance, expand the scope of use, and biocompatibility sex high effect

Pending Publication Date: 2021-02-02
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the treatment methods for heavy metal polluted wastewater mainly include: chemical deposition method, electrochemical method, membrane filtration method and adsorption method. Each of these methods has its advantages and disadvantages, and will bring environmental pollution problems.
Adsorption method has the characteristics of simple operation, no secondary pollution and high adsorption efficiency in heavy metal waste treatment technology, but it also has the disadvantages of high cost and short life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) Preparation of carbon quantum dot solution: Mix citric acid and ethylenediamine in a ratio of 1:1, dissolve in 30mL pure water, and mix evenly by ultrasonication for 30min. Take the evenly mixed solution and place it in a reaction kettle at 200°C. 5h, then place the solution after heat preservation in a dialysis bag, and dialyze for 24h to obtain a carbon quantum dot solution;

[0018] 2) Activated carbon pretreatment: Grind the block activated carbon until it passes through a 60-mesh sieve, then soak it in pure water, remove the lower layer of precipitate and dry it in an oven; take 10g of dried activated carbon and add 100mL10% HNO 3 Soak in the solution for 24 hours, then wash it with pure water, and then dry it in an oven at 105°C to obtain pretreated activated carbon;

[0019] 3) Carbon quantum dots modified activated carbon: Add 10% carbon quantum dots solution to 100mL pure water, then take 5g of pretreated activated carbon and put it in 100mL mixed solution ...

Embodiment 2

[0022] 1) Preparation of carbon quantum dot solution: mix citric acid and ethylenediamine in a ratio of 1:1, dissolve in 30mL pure water, and mix well by ultrasonication for 30min. Take the well-mixed solution and place it in a 200°C reactor for 5h. , and then place the solution after heat preservation in a dialysis bag, and dialyze for 24 hours to obtain a carbon quantum dot solution;

[0023] 2) Activated carbon pretreatment: Grind the block activated carbon until it passes through a 60-mesh sieve, then soak it in pure water, remove the lower layer of precipitate and dry it in an oven; take 10g of dried activated carbon and add 100mL10% HNO 3 Soak in the solution for 24 hours, then wash with pure water, and then dry it in an oven at 105°C to obtain pretreated activated carbon.

[0024] 3) Carbon quantum dot-modified activated carbon: add a concentration of 50% carbon quantum dot solution to 100mL pure water, then take 5g of pretreated activated carbon and place it in 100mL ...

Embodiment 3

[0026] 1) Preparation of carbon quantum dot solution: mix citric acid and ethylenediamine in a ratio of 1:1, dissolve in 30mL pure water, and mix evenly by ultrasonication for 30min. Take the evenly mixed solution and place it in a high-temperature reactor to keep different temperature, holding time for 5 hours, and then put the reacted solution in a dialysis bag, and dialyze for 24 hours to obtain a carbon quantum solution.

[0027] 2) Activated carbon pretreatment: Grind the block activated carbon until it passes through a 60-mesh sieve, then soak it in pure water, remove the lower layer of precipitate and dry it in an oven; take 10g of dried activated carbon and add 100mL10% HNO 3 Soak in the solution for 24 hours, then wash with pure water, and then dry it in an oven at 105°C to obtain pretreated activated carbon;

[0028] 3) Carbon quantum dots modified activated carbon: Add a carbon quantum dot solution with a concentration of 100% to 100mL pure water, then take 5g of p...

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Abstract

The invention discloses a preparation method of a carbon quantum dot modified activated carbon heavy metal adsorption material. The method comprises the following steps: step 1, pretreating activatedcarbon; 2, putting the activated carbon pretreated in the step 1 into a carbon quantum dot aqueous solution, carrying out ultrasonic dispersion at normal temperature, and finally, conducting standingfor precipitation; and 3, drying the activated carbon subjected to static settlement in the step 2 to finally obtain the carbon quantum dot modified activated carbon adsorption material. The selectiveadsorption performance of the prepared novel material on heavy metal ions is improved; and the adsorbing material is stable in performance and high in biocompatibility, and the application range of the adsorbent is expanded.

Description

technical field [0001] The invention relates to a preparation method of a carbon quantum dot modified active carbon heavy metal adsorption material. Background technique [0002] At present, the treatment methods for heavy metal polluted wastewater mainly include: chemical deposition method, electrochemical method, membrane filtration method and adsorption method. Each of these methods has its advantages and disadvantages, and will bring environmental pollution problems. Adsorption method has the characteristics of simple operation, no secondary pollution and high adsorption efficiency in heavy metal waste treatment technology, but it also has the disadvantages of high cost and short life. As an adsorbent, activated carbon has poor selective adsorption effect when acting alone, so it is necessary to combine activated carbon with other materials to form a new material to improve performance. Contents of the invention [0003] In order to overcome the shortcomings in the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20C02F1/283C02F2101/20
Inventor 张太亮郑存川袁磊李朝晖张旭
Owner SOUTHWEST PETROLEUM UNIV
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