Geopolymer adsorption material and preparation method thereof

A technology of geopolymers and adsorption materials, applied in the fields of silicon compounds, chemical instruments and methods, adsorbed water/sewage treatment, etc. Low cost, high cost, good application prospects

Active Publication Date: 2019-07-23
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional adsorption materials include natural adsorption materials (such as zeolite, kaolin, diatomite, montmorillonite, wood fiber, etc.), artificial adsorption materials (such as activated carbon, carbon nanotubes, nanofiber membranes, etc.) and biological adsorption materials (bacteria, fungi, algae, etc.), but these adsorption materials still have problems such as poor adsorption performance and high application cost, so they have not been widely used.

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  • Geopolymer adsorption material and preparation method thereof
  • Geopolymer adsorption material and preparation method thereof
  • Geopolymer adsorption material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] The preparation of embodiment 1 geopolymer adsorption material

[0038] The present embodiment provides a geopolymer adsorption material, including the following raw materials in parts by weight: 33.3 parts of fly ash, 66.7 parts of metakaolin, 65.6 parts of water glass, 14.4 parts of sodium hydroxide and 40 parts of deionized water;

[0039] Among them, metakaolin is obtained by calcining raw kaolin powder at 900°C for 3 hours, and the fly ash and metakaolin are respectively passed through a 100-mesh sieve; the modulus of water glass is 3.3.

[0040] The preparation method of the geopolymer adsorption material of the present embodiment comprises the following steps:

[0041] (1) Mix fly ash and metakaolin evenly to obtain aluminosilicate powder;

[0042] (2) After mixing water glass and sodium hydroxide, carry out ultrasonic treatment for 20 minutes, and then stand at room temperature for 24 hours to obtain an alkali activator;

[0043] (3) mix the aluminosilicate po...

Embodiment 2

[0047] Embodiment 2 Utilizes the geopolymer adsorption material of Embodiment 1 to adsorb heavy metal ions in the solution under different time conditions

[0048] Using Pb(NO 3 ) 2 , Cd(NO 3 ) 2 and Cu(NO 3 ) 2 Reagents prepare a certain concentration of heavy metal solutions, using NaOH and HNO 3 Adjust the pH of the solution. Weigh 0.1 g of geopolymer adsorption material, add it to 25 ml of heavy metal solution, shake at 25°C, and absorb heavy metals under different time conditions. The adsorption solution was filtered through a microporous membrane with a pore size of 0.45 μm, and the concentration of heavy metal ions in the solution was determined by atomic absorption method.

[0049] Among them, the initial concentration and initial pH of heavy metal ions in each solution are: Pb 2+ 300mg / L, pH=3; Cd 2+ 300mg / L, pH=5; Cu 2+ 200mg / L, pH=4. The adsorption time gradient is set as: 0, 5, 10, 20, 40, 80, 120, 180, 240, 300, 400, 600min.

[0050] Effect of geopolym...

Embodiment 3

[0051] Embodiment 3 Utilizes the geopolymer adsorption material of Embodiment 1 to adsorb heavy metals of different concentrations

[0052] Using Pb(NO 3 ) 2 , Cd(NO 3 ) 2 , Cu(NO 3 ) 2 The reagents prepare heavy metal solutions with different concentration gradients, using NaOH and HNO 3 Adjust the pH of the solution. Pb 2+ The initial pH is set to 3, and the initial concentration gradient is set to 100, 200, 300, 500, 800, 1000mg / L; Cd 2+ The initial pH is set to 5, and the initial concentration gradient is set to 50, 100, 200, 300, 500, 800mg / L; Cu 2+ The initial pH was set to 4, and the initial concentration gradient was set to 50, 100, 200, 300, 500mg / L.

[0053] Weigh 0.1 g of geopolymer adsorption material, add it to 25 ml of heavy metal solution, and shake for 300 min at 25 ° C to make the adsorption reach equilibrium. The adsorption solution was filtered through a microporous membrane with a pore size of 0.45 μm, and the concentration of heavy metal ions in ...

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Abstract

The invention provides a geopolymer adsorption material and a preparation method thereof. The geopolymer adsorption material is prepared from the following raw materials in parts by weight: 15-35 parts of fly ash, 65-85 parts of metakaolin, 40-120 parts of water glass, 2-30 parts of sodium hydroxide and 30-90 parts of deionized water. The preparation method comprises the following steps that all the raw materials are uniformly mixed to obtain slurry, the slurry is injected into a mould to be alternately cured at a temperature of 80 DEG C and under a room temperature condition, and therefore, the geopolymer adsorption material is obtained. According to the geopolymer adsorption material and the preparation method thereof provided by the invention, the fly ash, the metakaolin and the like are taken as the raw materials to prepare the geopolymer adsorption material with high adsorption performance and low cost; on one hand, a new material is provided for removing heavy metal ions in sewage; on the other hand, the resource utilization of industrial waste can be realized, and the geopolymer adsorption material has a good application prospect.

Description

technical field [0001] The invention relates to the field of adsorption materials, in particular to a geological polymer adsorption material and a preparation method thereof. Background technique [0002] Untreated industrial wastewater containing heavy metals will pollute soil and water bodies and adversely affect the growth and survival of animals and plants. After heavy metals enter the human body through the food chain, they will eventually endanger human health. Industries such as electroplating, battery manufacturing, printed circuit boards, and metal surface coating treatment are important sources of sewage containing heavy metals. [0003] At present, the methods for purifying heavy metals in water include membrane separation technology, ion exchange technology, biological treatment technology, adsorption method and chemical precipitation. Adsorption is widely used in sewage treatment due to its convenience, high efficiency and low cost. Traditional adsorption mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00B01J20/16B01J20/30C02F1/28C02F101/20
CPCB01J20/12B01J20/16C02F1/281C02F2101/20C04B28/006C04B18/08C04B14/106C04B12/04C04B22/062Y02P40/10
Inventor 郭世文兰天李品芳李响玲
Owner CHINA AGRI UNIV
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