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MgO-loaded activated carbon as well as preparation method and application thereof

A technology of activated carbon and solution, applied in chemical instruments and methods, other chemical processes, special treatment targets, etc., can solve problems such as limited boron ion adsorption capacity, secondary pollution, etc., achieve circular economic benefits and environmental benefits, and adapt to low temperature Strong ability to improve the effect of adsorption and removal rate

Pending Publication Date: 2021-05-07
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of activated carbon loaded with MgO and its preparation method and application in order to overcome the existing activated carbon with limited boron ion adsorption capacity and easy to cause secondary pollution. The activated carbon loaded with MgO can be more Quickly and effectively adsorb boron ions in seawater and / or boron industrial sewage, so as to obtain water bodies with boron content meeting the standard, and at the same time greatly solve the problem of environmental pollution

Method used

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  • MgO-loaded activated carbon as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0039] (a) Set the specific surface area to 1200m 2 / g of coconut shell activated carbon is screened, and after sieving, 10g of coconut shell activated carbon with a particle size of 20-60 meshes is weighed, and vacuum-dried at 105°C for 4h, and the moisture content of the dried material is ≤1%. Add the dried granular activated carbon into the round bottom flask, then add 75mL 0.08mol / L nitric acid solution, ultrasonically shake for 2h, filter and recover the solvent, wash the solid product repeatedly with deionized water several times, and then vacuum dry it at 75°C for 8h. Obtain preoxidized activated carbon.

[0040] (b) Add 100mL of 0.03mol / L magnesium chloride solution to the pre-oxidized activated carbon, stir well, add 20mL of 0.010mol / L polyethylene glycol solution dropwise at a rate of 1mL / min to the resulting mixture, at room temperature supplemented with vigorous Magnetic stirring (speed>800r / min). After the polyethylene glycol solution was added dropwise, ultraso...

Embodiment 2

[0043] (a) Set the specific surface area to 1200m 2 / g of coconut shell activated carbon is screened, and after sieving, 10g of coconut shell activated carbon with a particle size of 20-60 meshes is weighed, and vacuum-dried at 105°C for 4h, and the moisture content of the dried material is ≤1%. Add the dried granular activated carbon into the round bottom flask, then add 75mL 0.08mol / L nitric acid solution, ultrasonically shake for 2h, filter and recover the solvent, wash the solid product repeatedly with deionized water several times, and then vacuum dry it at 75°C for 8h. Obtain preoxidized activated carbon.

[0044] (b) Add 100mL of 0.03mol / L magnesium chloride solution to the pre-oxidized activated carbon, stir evenly, add 20mL of 0.010mol / L polyethylene glycol solution dropwise at a rate of 1mL / min to the resulting mixture, and add Vigorous magnetic stirring (speed>800r / min). After the polyethylene glycol solution was added dropwise, ultrasonically oscillate for 1 h, t...

Embodiment 3

[0047] (a) Set the specific surface area to 1400m 2 / g of bamboo activated carbon was sieved, and after sieving, 10g of bamboo activated carbon with a particle size of 20-60 mesh was weighed, and vacuum-dried at 105°C for 4h, and the moisture content of the dried material was ≤1%. Add the dried granular activated carbon into a round bottom flask, then add 120mL 0.1mol / L hydrogen peroxide solution, ultrasonically shake for 2h, filter and recover the solvent, wash the solid product repeatedly with deionized water several times, and then vacuum dry it at 75°C for 8h. Obtain preoxidized activated carbon.

[0048] (b) Add 120 mL of 0.05 mol / L magnesium chloride solution to the pre-oxidized activated carbon subsequently, stir well, add 30 mL of 0.010 mol / L polyethylene glycol solution dropwise at a rate of 1 mL / min to the resulting mixture, and assist Stir vigorously with magnetic force (speed>800r / min). After the polyethylene glycol solution was added dropwise, ultrasonically osc...

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Abstract

The invention belongs to the technical field of water treatment, and relates to MgO-loaded activated carbon as well as a preparation method and application thereof. The preparation method of the MgO-loaded activated carbon comprises the following steps: (a) impregnating activated carbon with the water content of less than or equal to 1% in a strong oxidant solution, carrying out solid-liquid separation on an obtained impregnated product, and washing and drying an obtained solid product to obtain pre-oxidized activated carbon; and (b) uniformly mixing the pre-oxidized activated carbon and a magnesium salt solution, dropwise adding a polyethylene glycol solution into the obtained mixture, carrying out vigorous stirring reaction at room temperature of 50 DEG C, carrying out solid-liquid separation on the obtained reaction product, drying the obtained solid product, and calcining at high temperature under the protection of inert gas to obtain the MgO-loaded activated carbon. The MgO-loaded activated carbon obtained by the method provided by the invention can more quickly and effectively adsorb boron ions in seawater and / or boron industrial sewage so as to obtain desalinated water with boron content meeting the standard, and meanwhile, the environmental problem is greatly solved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an activated carbon loaded with MgO, a preparation method and application thereof. Background technique [0002] With the continuous growth of population and the deteriorating environment, more than 4 billion people around the world will face severe water shortages for at least one month every year, and the affected population accounts for two-thirds of the total number of people in the world. The issue of water resources has come into the public eye more and more frequently, and it is urgent to increase revenue and reduce expenditure. The rational development and utilization of seawater resources has become an important direction to expand water sources and solve the shortage of fresh water resources. The amount of seawater desalination in the world is increasing year by year, and by 2016, the cumulative production capacity will be 1,600,000m 3 / d, showing a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/32C02F1/28C02F101/10
CPCB01J20/20B01J20/041B01J20/3085B01J20/3078B01J20/32C02F1/288C02F2101/108C02F2303/16
Inventor 邢贞娇汪印李智伟
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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