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Biological calcium type phosphate radical adsorption porous material and preparing method thereof

A technology of porous materials and phosphate radicals, applied in the field of environment and materials, to achieve the effect of lasting and effective adsorption capacity, low production cost, and improved adsorption efficiency

Active Publication Date: 2015-12-09
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] After searching, there is no method at home and abroad to use oyster shells, egg shells, cement and silica powder as raw materials, add additives, and prepare biological calcium-type phosphate adsorption porous materials. This project is the first technology researched and invented at home and abroad.

Method used

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preparation example Construction

[0024] The specific steps of the preparation method of the biological calcium phosphate adsorption porous material prepared by utilizing oyster shells, egg shells, silica micropowder and cement are as follows:

[0025] (1) Wash and dry oyster shells and egg shells, crush and grind them, and then calcinate them at 400°C for 2 hours.

[0026] (2) Accurately weigh the pretreated oyster shells, egg shells, cement, and silica powder according to the formula, and dry mix them for 20 minutes, add water and water reducing agent at a water-cement ratio of 0.5, and stir for 15 minutes to make a clean slurry .

[0027] (3) Weigh the foaming agent and foam stabilizer according to the proportion of the formula and mix them to prepare foam, add them to the slurry and stir for 5 minutes.

[0028] (4) The foamed concrete is poured into a test mold with an outer diameter of 5 cm, an inner diameter of 3.5 cm, and a length of 8 cm. The test piece is placed in the laboratory for 2 days, and then...

Embodiment 1

[0030] The weight ratio of the raw material formula is: 30wt% of cement, 5wt% of silica powder, 42.5wt% of oyster shell, 20wt% of egg shell and 2.5wt% of additive.

[0031] The specific steps of the preparation method are:

[0032] (1) Wash and dry oyster shells and egg shells, crush and grind them, and then calcinate them at 400°C for 2 hours.

[0033] (2) Accurately weigh the pretreated oyster shells, egg shells, cement, and silica powder according to the formula, and dry mix them for 20 minutes, add water and water reducing agent at a water-cement ratio of 0.5, and stir for 15 minutes to make a clean slurry .

[0034] (3) Weigh the foaming agent and foam stabilizer according to the proportion of the formula and mix them to prepare foam, add them to the slurry and stir for 5 minutes.

[0035] (4) The foamed concrete is poured into a test mold with an outer diameter of 5 cm, an inner diameter of 3.5 cm, and a length of 8 cm. The test piece is placed in the laboratory for 2 ...

Embodiment 2

[0038] The weight ratio of the raw material formula is: 40wt% of cement, 5wt% of silicon micropowder, 32.5wt% of oyster shell, 20wt% of egg shell and 2.5wt% of admixture.

[0039] The specific steps of the preparation method are:

[0040] (1) Wash and dry oyster shells and egg shells, crush and grind them, and then calcinate them at 400°C for 2 hours.

[0041] (2) Accurately weigh the pretreated oyster shells, egg shells, cement, and silica powder according to the formula, and dry mix them for 20 minutes, add water and water reducing agent at a water-cement ratio of 0.5, and stir for 15 minutes to make a clean slurry .

[0042] (3) Weigh the foaming agent and foam stabilizer according to the proportion of the formula and mix them to prepare foam, add them to the slurry and stir for 5 minutes.

[0043] (4) The foamed concrete is poured into a test mold with an outer diameter of 5 cm, an inner diameter of 3.5 cm, and a length of 8 cm. The test piece is placed in the laboratory...

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Abstract

The invention discloses a biological calcium type phosphate radical adsorption porous material and a preparing method thereof. The preparing method comprises the steps: taking cement, microsilicon powder, oyster shell and egg shell as raw materials, grinding processed oyster shell and egg shell into tiny particles, adding the cement and microsilicon powder to prepare a cement slurry, then preparing foam, finally mixing mortar with the foam, pouring and performing autoclaved curing to obtain the biological calcium type phosphate radical adsorption porous material. According to the method, waste resources of the common Portland cement, the microsilicon powder generated by a ferroalloy smelting plant, the egg shell generated by agricultural products and the oyster shell generated in fishery production are taken as raw materials to develop the biological calcium type phosphate radical adsorption porous material, which has durable and efficient phosphorus adsorption capacity and realizes waste control by waste, due to the porous structure and well biocompatibility, an apposition growth occasion is provided for water organisms, and the preparing method of the material is simple, effective, low in cost and easy to popularize, and has well economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of environment and materials, and in particular relates to a method for preparing a biological calcium-type phosphate adsorption porous material by using cement, silicon micropowder, oyster shells and egg shells. Background technique [0002] Our daily domestic sewage and industrial wastewater often contain a large amount of phosphorus. Discharging into water will cause excessive growth of algae, resulting in eutrophication of water body and deterioration of water quality. The important pollutants in pesticide wastewater are high-concentration organic phosphorus. This type of wastewater has the characteristics of high toxicity, high concentration, and biodegradability. Once it enters the water environment, it will cause extremely serious damage to the ecological environment. Therefore, it is necessary to study low-cost and high-efficiency phosphorus adsorption materials. [0003] Fujian's aquaculture industry is well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/28B01J20/30
Inventor 于岩张复伟凌华金张海峰
Owner FUZHOU UNIV
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