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Method for treating radioactive wastewater by utilizing konjac glucomannan-reduced graphene oxide (KGM-rGO) sponge

A technology of radioactive waste water and sponge, applied in radioactive purification, nuclear engineering, etc., can solve the problems that carbon materials are difficult to be widely used, carbon nanostructures are easy to aggregate, and the influence of volume change stress, etc., achieve rapid heat preservation, simple preparation process, The effect of efficient processing

Active Publication Date: 2020-05-22
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon nanostructures aggregate easily in water and are susceptible to volume changes and stresses from dynamic fluids
Due to the limitation of the service life and reusability of carbon materials, it is difficult for carbon materials to be widely used in various environmental governance
In addition, solar absorbing materials often have a membrane structure, which causes huge heat loss through thermal diffusion due to their continuous light-to-heat conversion surface and direct contact with bulk water.

Method used

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  • Method for treating radioactive wastewater by utilizing konjac glucomannan-reduced graphene oxide (KGM-rGO) sponge
  • Method for treating radioactive wastewater by utilizing konjac glucomannan-reduced graphene oxide (KGM-rGO) sponge
  • Method for treating radioactive wastewater by utilizing konjac glucomannan-reduced graphene oxide (KGM-rGO) sponge

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A kind of method utilizing KGM-rGO sponge to process radioactive waste water, comprises the following steps:

[0045] Step 1. Disperse 0.1g of graphene oxide in 100mL of deionized water, ultrasonicate for 4 hours to obtain a graphene oxide solution; then add 1g of konjac glucomannan to the graphene oxide solution, mix and stir at room temperature for 24 hours, and freeze into blocks After that, vacuum freeze-drying; put the dried solid sample into the reaction kettle, add 100mL 0.3mol / L KOH solution and 100mL absolute ethanol at the same time, put the reaction kettle in an oven and keep it warm at 80°C for 8h to realize deacetylation and oxidation Reduction of graphene; vacuum freeze-drying after taking out to obtain konjac glucomannan-reduced graphene oxide sponge (KGS); the power of ultrasonic is 300W, and the ultrasonic frequency is 35kHz; the temperature of vacuum freeze-drying is -50 ℃; Degree 1.8 Pa; figure 1 The SEM figure of the konjac glucomannan-reduced graph...

Embodiment 2

[0055] A kind of method utilizing KGM-rGO sponge to process radioactive waste water, comprises the following steps:

[0056]Step 1. Disperse 0.2g of graphene oxide in 200mL of deionized water and ultrasonicate for 5 hours to obtain a graphene oxide solution; then add 2g of konjac glucomannan to the graphene oxide solution, mix and stir at room temperature for 24 hours, and freeze into blocks Afterwards, vacuum freeze-drying; put the dried solid sample into the reaction kettle, add 200mL 0.4mol / L KOH solution and 200mL absolute ethanol at the same time, put the reaction kettle in an oven at 80°C for 10h to realize deacetylation and oxidation Reduction of graphene; vacuum freeze-drying after taking out to obtain konjac glucomannan-reduced graphene oxide sponge (KGS); the power of ultrasonic is 300W, and the ultrasonic frequency is 35kHz; the temperature of vacuum freeze-drying is -50 ℃; Degree 1.8 Pa;

[0057] Step 2, set up a holding tank on the upper surface of the polystyren...

Embodiment 3

[0059] A kind of method utilizing KGM-rGO sponge to process radioactive waste water, comprises the following steps:

[0060] Step 1. Disperse 0.1g of modified graphene oxide in 100mL of deionized water, and ultrasonicate for 4 hours to obtain a graphene oxide solution; then add 1g of konjac glucomannan to the graphene oxide solution, mix and stir at room temperature for 24 hours, and freeze After forming a block, vacuum freeze-dry; put the dried solid sample into the reaction kettle, add 100mL 0.3mol / L KOH solution and 100mL absolute ethanol at the same time, put the reaction kettle in an oven at 80°C for 8h to realize deacetylation and reduction of modified graphene oxide; vacuum freeze-drying after taking out to obtain konjac glucomannan-reduced graphene oxide sponge; ultrasonic power is 300W, ultrasonic frequency is 35kHz; vacuum freeze-drying temperature is -50°C; The vacuum degree is 1.8 Pa; the preparation method of the modified graphene oxide is: adding 1 g of graphene ...

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Abstract

The invention discloses a method for treating radioactive wastewater by utilizing a KGM-rGO sponge. The method comprises the following steps: preparing the KGM-rGO sponge; forming an accommodating groove in the upper surface of polystyrene foam; embedding the KGM-rGO sponge into the accommodating groove in the polystyrene foam; then adding the polystyrene foam embedded with the KGM-rGO sponge intothe radioactive wastewater; illuminating the part, exposed out of the radioactive wastewater, of the KGM-rGO sponge by using a xenon lamp so as to realize evaporation treatment of the radioactive wastewater, wherein radioactive ions in the radioactive wastewater are adsorbed by the KGM-rGO sponge at the same time. The preparation process of the KGM-rGO sponge is simple, radioactive wastewater driven by solar energy can be efficiently treated, the KGM-rGO sponge has good water absorption, photothermal property, heat preservation property and rapid transport property, the evaporation efficiencyof water is improved, and the concentration of radioactive elements in the evaporated radioactive wastewater is obviously reduced.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a method for treating radioactive waste water with KGM-rGO sponge. Background technique [0002] With the application of nuclear technology, radioactive wastewater is increasingly generated in various ways, including the operation of nuclear power plants, uranium mining and radiomedical research. In order to protect human health and deal with seriously harmful radioactive wastewater, people have developed biological methods, electrochemical methods, chemical precipitation methods, photocatalysis, adsorption methods, etc. However, these methods only focus on the enrichment of radionuclides. The volume reduction treatment of wastewater is also of great significance to the treatment of radioactive wastewater. Therefore, it is urgent to meet the high-quality requirements of volume reduction of radioactive wastewater and enrichment of radionuclides, which are the two most import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/12G21F9/04G21F9/06
CPCG21F9/04G21F9/06G21F9/12
Inventor 竹文坤何嵘段涛杨帆周建陈涛俞开福
Owner SOUTHWEAT UNIV OF SCI & TECH
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