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Preparation and regeneration method of EDTA-Na2 modified active carbon

A technology of activated carbon and granular activated carbon, which is applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of poor use effect and poor removal effect of heavy metal ions, and achieve the cost of wastewater treatment. The effect of reducing and improving adsorption performance and adsorption efficiency

Inactive Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This technology aims to solve the problem of poor use of existing wastewater catalysts, but the prepared loaded noble metal activated carbon catalyst does not have a good removal effect on heavy metal ions in wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Coal-based activated carbon pretreatment: Mix 1L deionized water with 500g coal-based granular activated carbon and place in a 3L container, soak for 30min and discard the filtrate, then add 1L deionized water to wash the activated carbon for 35min, then place the solid activated carbon in 103 Dry in an oven at ℃ for 12 hours, and store in a desiccator for later use;

[0016] Activated carbon modification treatment: take 30g of pretreated activated carbon, add EDTA-Na 2 solution, put it into a 500mL Erlenmeyer flask, seal the bottle mouth with a rubber stopper, place it in a reactor at 125°C and 0.14MPa, and perform immersion reaction treatment for 35min. The impregnated activated carbon was washed twice with 60 mL of deionized water, and the solid was dried in an oven at 103°C after discarding the washing liquid to obtain EDTA-Na 2 Modified activated carbon.

[0017] Adsorption test: preparation of Zn containing heavy metal ions 2+ , Pb 2+ The simulated wastewater ...

Embodiment 2

[0021] Coal-based activated carbon pretreatment: Mix 0.5L deionized water with 500g coal-based granular activated carbon and place it in a 3L container, soak for 60 minutes, discard the filtrate, add 0.5L deionized water to wash the activated carbon for 15 minutes, and place the solid activated carbon Dry in an oven at 103°C for 10 hours, and store in a desiccator for later use;

[0022] Activated carbon modification treatment: take 36g of pretreated activated carbon, add EDTA-Na 2 solution, put it into a 500mL Erlenmeyer flask, seal the bottle mouth with a rubber stopper, place it in a reactor at 95°C and 0.16MPa, and soak for 50min. The impregnated activated carbon was washed twice with 72 mL of deionized water, and the solid was dried in an oven at 103°C after discarding the washing liquid to obtain EDTA-Na 2 Modified activated carbon.

[0023] Regeneration treatment: EDTA-Na after adsorption 2 The modified activated carbon is impregnated with 0.09mol / L sodium hydroxide ...

Embodiment 3

[0026] Coal-based activated carbon pretreatment: mix 2L deionized water with 500g coal-based granular activated carbon and place it in a 3L container, soak for 50 minutes and discard the filtrate, then add 2L deionized water to wash the activated carbon for 25 minutes, then place the activated carbon solids at 103 Dry in an oven at ℃ for 11 hours, and store in a desiccator for later use;

[0027] Activated carbon modification treatment: take 24g of pretreated activated carbon, add EDTA-Na 2 solution, put it into a 500mL Erlenmeyer flask, seal the mouth of the bottle with a rubber stopper, place it in a reactor at 105°C and 0.15MPa, and perform immersion reaction treatment for 60min. The impregnated activated carbon was washed twice with 48 mL of deionized water, and the solid was dried in an oven at 103°C after discarding the washing liquid to obtain EDTA-Na 2 Modified activated carbon.

[0028] Regeneration treatment: EDTA-Na after adsorption 2 The modified activated carbo...

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Abstract

The invention discloses a preparation and regeneration method of EDTA-Na2 modified active carbon. With the adoption of an EDTA-Na2 solution for carrying out modification treatment on coal-based active carbon, compared with unmodified active carbon, the prepared modified active carbon has obviously higher removal efficiency to heavy metal ions like Zn<2+> and Pb<2+> in waste water, and the EDTA-Na2 modified active carbon after absorption can be recycled through regeneration treatment.

Description

technical field [0001] The present invention relates to a kind of EDTA-Na 2 The invention discloses a preparation and regeneration method of modified activated carbon, belonging to the technical field of preparation of adsorbents for wastewater treatment. Background technique [0002] Processes such as metal smelting, processing, and electroplating will produce a large amount of industrial wastewater containing heavy metals. If this type of wastewater is directly discharged into the surrounding water body, it will not only affect the self-purification of the water body and pollute the environment, but also cause cancer if it is excessively ingested by the human body. Acute heavy metal poisoning can cause vomiting, fatigue, coma and even death, while chronic symptoms can lead to low immunity, various tumors and chronic diseases occur frequently, seriously affecting the safety of humans and other living things. Therefore, the treatment of heavy metal wastewater has attracted...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/223C02F1/288C02F2101/20
Inventor 刘树根王群超关清卿王洁杨希
Owner KUNMING UNIV OF SCI & TECH
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