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Preparation method and application of oxygen sustained release and phosphorus absorption material

A mixture and calcium peroxide technology, applied in the field of materials, can solve the problems of fast oxygen release, poor durability, secondary pollution, etc., and achieve the effects of long oxygen release duration, simple and easy method, and good phosphorus absorption effect.

Inactive Publication Date: 2017-07-14
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of aeration for oxygen supply requires high equipment purchase and operating costs, and cannot achieve the effect of removing phosphorus in water; while traditional oxygen-releasing materials release oxygen quickly and have poor durability, and calcium peroxide powder has a negative impact on water quality after the oxygen-releasing reaction. The pH has a great influence, causing secondary pollution, and at the same time, the phosphorus absorption effect is not good

Method used

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  • Preparation method and application of oxygen sustained release and phosphorus absorption material
  • Preparation method and application of oxygen sustained release and phosphorus absorption material
  • Preparation method and application of oxygen sustained release and phosphorus absorption material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A preparation method of an oxygen slow-release, phosphorus-absorbing material, the specific steps are as follows:

[0025] (1) After uniformly mixing iron-carrying granular biochar, calcium peroxide particles, Portland cement, and quartz sand, it is standby to obtain the mixture;

[0026] Preferably, the iron-loaded granular biochar is prepared from walnut shell particles, and the specific preparation method is as follows: the walnut shell particles are placed in Fe 3+ Immerse in the impregnation solution with a concentration of 0.5-1.0mol / L for more than 12 hours, and then carbonize the impregnated walnut shell particles at 480-520°C for 80-100min under anaerobic conditions, and the obtained iron-carrying granular biochar particles diameter is 1-2mm; the particle diameter of the calcium peroxide particles is 90-110 mesh, and the purity is 70-80%; the Portland cement is 425 Portland cement; the particle size of the quartz sand is The diameter is 1-2mm.

[0027] Prefer...

Embodiment 2

[0033] The test of material phosphorus removal effect of the present invention is as follows:

[0034] Through the static adsorption test, when the initial phosphorus concentration is 5mg / L, 50mg / L, the solution volume is 100mL, and the weight of oxygen slow-release and phosphorus-absorbing materials are 0.81g, 0.85g, 1.55g, 1.62g respectively, after 4 hours The equilibrium adsorption capacity is shown in Tables 1 and 2 below.

[0035] Phosphorus removal effect under each example operating condition of table 1

[0036]

[0037] Phosphorus removal effect under each example operating condition of table 2

[0038]

[0039] It can be seen from Tables 1 and 2 that this material has a good adsorption effect on both low and high concentrations of phosphorus in the solution.

Embodiment 3

[0041] Material of the present invention is as follows to the test of simulated river dephosphorization, oxygen release effect:

[0042] 10cm of river sediment was filled in two groups of simulated reactors respectively, and the depth of water covered by the sediment was 40cm. In group 1 (blank group), the upper port of the reactor was immediately closed after nitrogen deoxygenation for 10 minutes to reduce the influence of atmospheric oxygen coverage. Group 2 (experimental group), after 10 minutes of deoxygenation with nitrogen, add 400g, cover 2cm thick oxygen slow-release phosphorus absorbing material, close the upper opening of the reactor to reduce the influence of atmospheric oxygen covering, at 0, 3, 6, 9, On the 12th, 15th, 18th, 21st, 24th, and 27th days, samples were taken to measure the total phosphorus in the overlying water and the dissolved oxygen concentration in the overlying water in the simulated reactor. The result is as follows figure 1 , figure 2 shown....

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Abstract

The invention relates to a preparation method of an oxygen sustained release and phosphorus absorption material. The preparation method comprises the specific steps: (1) uniformly mixing iron-carrying particle biological charcoal, calcium peroxide particles, Portland cement and quartz sand to obtain a mixture for later use; (2) adding water into the mixture and stirring and mixing to carry out a hydration reaction for 8min-12min; (3) granulating materials subjected to the hydration reaction and carrying out air drying, sealing and preserving for later use; and (4) before engineering application, embedding the air-dried particles with calcium alginate and immediately taking out for use. The preparation method is simple and feasible; the oxygen sustained release and phosphorus absorption material prepared by the preparation method has long sustained release lasting time, good phosphorus absorption effect and low cost; and meanwhile, influences on an environment in a material utilization process are avoided. The oxygen sustained release and phosphorus absorption material can be used as a black and odorous water repairing material, an oxygen aeration and phosphorus absorption material of an aquaculture water region, compound ecological floating bed filler and ecological floating bed filler.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method and application of an oxygen slow-release and phosphorus-absorbing material. Background technique [0002] The pollution of black and odorous water bodies is one of the prominent water environment problems in my country. Insufficient dissolved oxygen in water bodies and high concentrations of nitrogen, phosphorus and organic pollutants are typical characteristics of black and odorous water bodies, and they are also important driving factors for the occurrence of black and odorous water bodies. At the same time, hypoxia in some aquaculture waters occurs from time to time, leading to the death of aquaculture fish and causing huge economic losses. In order to effectively contain and control black and odorous water bodies and prevent hypoxia in aquaculture water bodies, it is necessary to use some oxygen-releasing adsorbent materials to increase oxygen in wat...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/68C02F101/10
CPCC02F1/281C02F1/283C02F1/285C02F1/68C02F2101/105
Inventor 邓国志石先阳晋迎兵华夏余维滨
Owner ANHUI UNIVERSITY
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