Porous phosphorus removal ceramisites and preparation method thereof

A technology for ceramsite and crop straw, which is applied in the field of porous phosphorus removal ceramsite and its preparation to achieve the effects of shortening adsorption time, increasing mass transfer rate and increasing specific surface area

Inactive Publication Date: 2015-09-02
ANHUI UNIVERSITY OF ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Damment S J P et al. (Nephrol Dial Transplant, 2003,18(4):683) found that lanthanum carbonate has the best phosphorus binding ability when the pH is 3-5, which can reach more than 97%. Disease treatment, but rarely reported for the treatment of phosphorus-containing wastewater

Method used

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  • Porous phosphorus removal ceramisites and preparation method thereof
  • Porous phosphorus removal ceramisites and preparation method thereof
  • Porous phosphorus removal ceramisites and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation method of porous phosphorus-removing ceramsite specifically includes the following steps: (1) Ingredients: Weigh 70 parts of attapulgite, 20 parts of corn stalks, and 10 parts of lanthanum carbonate in parts by weight, and first crush the corn stalks with a pulverizer , and then mix the raw materials, wherein attapulgite is used as the main material, which itself has a certain adsorption capacity, which can realize the reasonable development of attapulgite, granulate into balls and sinter, and absorb phosphorus for easy recovery; (2) Blank making: According to the mass ratio of water to the above mixture of 1:0.45 to make ceramsite blanks; (3) Sintering: Dry and sinter the ceramsite blanks, preferably at 100°C for 25min, then raise the temperature to 700°C, the heating rate 2-4°C / min is appropriate, and sintered at this temperature for 30 minutes to obtain a sintered product; (4) Cooling: cooling the above sintered product to obtain porous phosphorus-remo...

Embodiment 2

[0033]The preparation method of porous phosphorus-removing ceramsite specifically includes the following steps: (1) Ingredients: Weigh 80 parts of attapulgite, 10 parts of rice straw, and 10 parts of lanthanum carbonate in parts by weight, and first crush the corn straw with a pulverizer , and then mix the raw materials. Among them, the rice straw is rich in fibrous tissue, which is transformed into activated carbon during the sintering process, which can endow the ceramsite with a porous structure, improve the mass transfer efficiency, and also enhance the adsorption capacity of phosphorus; (2) Blank making: According to the mass ratio of water and the above mixture to make ceramsite blanks; (3) Sintering: Dry and sinter the ceramsite blanks, preferably at 200°C for 30min, then heat up to 600°C and sinter for 40min to obtain Sintered product; (4) cooling: cooling the above-mentioned sintered product to obtain porous phosphorus-removing ceramsite. The SEM photographs of the pr...

Embodiment 3

[0037] The preparation method of porous phosphorus-removing ceramsite specifically includes the following steps: (1) Ingredients: Weigh 55 parts of attapulgite, 25 parts of rapeseed straw, and 20 parts of lanthanum carbonate in parts by weight, and first crush the rapeseed straw with a pulverizer , and then mix the raw materials; (2) Billet making: according to the mass ratio of water to the above mixture of 1:0.5 to make ceramsite billets; (3) sintering: dry and sinter the ceramsite billets, preferably at 120°C for heat preservation After 45 minutes, heat up to 650°C and sinter for 60 minutes to obtain a sintered product; (4) Cooling: Cool the above sintered product to obtain porous phosphorus-removing ceramsite. The SEM photographs of the prepared porous phosphorus-removing ceramsite are as follows: image 3 As shown, the interior of the ceramsite presents a rough and uneven pore structure, which is conducive to enhancing the adsorption capacity of phosphorus, thereby enhanc...

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Abstract

The invention provides porous phosphorus removal ceramisites and a preparation method thereof. The ceramisites are prepared from the following raw materials in parts by weight: 55-85 parts of attapulgite, 10-30 parts of crop straws and 10-20 parts of lanthanum carbonate. The raw materials are subjected to the steps of blending, preparing a blank, sintering and cooling to prepare the porous phosphorus removal ceramisites. The ceramisites provided by the invention are simple in preparation process and high in adsorption rate, the cylinder pressure strength meets cylinder requirements on high-strength lightweight aggregates in national standards, the phosphorus adsorption capacity of the ceramisites in a wide pH value range of 1-12 is high, and the maximum phosphorus removal rate can reach 98.6%. Because the ceramisites have strong acid and alkali resistance, after adsorbing phosphorus and being eluted by a sodium hydroxide solution, the porous phosphorus removal ceramisites not only can realize recovery of adsorbed phosphorus but also can be obtained again, and are convenient to recycle, so that resources can be effectively saved. The ceramisites can be widely applied to the field of practical engineering to achieve an aim of treatment of wastes with processes of wastes against one another.

Description

technical field [0001] The invention belongs to the technical field of environmental protection treatment, and in particular relates to a porous phosphorus-removing ceramsite and a preparation method thereof. Background technique [0002] With the development of economy and society, the degree of eutrophication of water bodies is gradually serious, which makes water bodies lose their functions such as self-purification and exchange, and poses a serious threat to drinking water safety and ecological systems. The control measures are mainly to control the phosphorus content in the water body, and then achieve the purpose of controlling the eutrophication of the water body. [0003] A lot of research work has been done on the control of phosphorus content in water bodies. For example, Yuan Donghai et al. (Agroecological Environment, 2004, 20(4): 1-5) used several clay minerals and clays to adsorb phosphorus in the solution, and found that the saturated adsorption capacity of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/13
Inventor 谢发之李海斌圣丹丹胡婷婷汪雪春谢志勇
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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