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A kind of biological calcium phosphate adsorption porous material and its preparation method

A porous material, biological calcium type technology, applied in the field of environment and materials, to achieve the effect of huge output, good economic benefits and low price

Active Publication Date: 2018-06-15
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 admixture.

[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 silica powder, 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 for 2...

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Abstract

The invention discloses a biological calcium phosphate adsorption porous material and a preparation method thereof. Using cement, silicon micropowder, oyster shells and egg shells as raw materials, the processed oyster shells and egg shells are broken into fine particles, and the cement is added Prepare cement slurry with silicon micropowder, then prepare foam, and finally mix mortar and foam, pour, and autoclave curing to obtain bio-calcium phosphate adsorption porous material. The present invention utilizes ordinary Portland cement, silicon micropowder produced by ferroalloy smelting plants, egg shells produced by agricultural product processing and oyster shells produced by fishery as raw materials to develop a biological calcium phosphate adsorption porous material. It has long-lasting and efficient phosphorus adsorption capacity, and realizes the treatment of waste with waste. At the same time, its porous structure and good biocompatibility provide water organisms with a place to attach and grow. The preparation method of the material is simple and effective, has low cost, is easy to popularize, and has good environmental and economic 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 Patents(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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