Modified nitrogen control material prepared from lake sediments, preparation method and application thereof

A sediment and modification technology, which is applied in the field of modified nitrogen control materials and its preparation, can solve the problems of weak ammonia nitrogen adsorption effect, poor ecological safety, and high cost, and achieve the solution of weak ammonia nitrogen adsorption effect, high safety, The effect of increasing the total pore volume

Active Publication Date: 2016-10-12
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] For this reason, the technical problem to be solved by the present invention is that the adsorption effect of ammonia nitrogen in the ammonia nitrogen controlled release material in the prior art is not strong, the cost is high and the ecological safety is poor, and then a kind of ammonia nitrogen adsorption and controlled release effect is provided, which is cheap and green Modified nitrogen-controlling materials prepared from lake sediments with high ecological safety and its preparation method and application

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  • Modified nitrogen control material prepared from lake sediments, preparation method and application thereof
  • Modified nitrogen control material prepared from lake sediments, preparation method and application thereof
  • Modified nitrogen control material prepared from lake sediments, preparation method and application thereof

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Embodiment 1

[0058] The method for preparing modified nitrogen-controlling materials using lake sediments described in this embodiment comprises the following steps:

[0059] (1) Collect lake sediments, freeze-dry, grind through a 20-mesh sieve, and set aside; wherein, the Al in the lake bottom mud 2 0 3 Content is 30%, Fe 2 o 3 content of 10%, CaO content of 20%, MgO content of 8%, K 2 The O content is 1%, and the others are 31%; the loss on ignition of the lake bottom mud is 30.43%;

[0060] (2) Take the lake sediment treated in step (1) and place it in a muffle furnace for constant temperature heating treatment, the heating temperature is 50°C, heat for 0.5 hour, then cool to room temperature, and set aside;

[0061] (3) Add zeolite in proportion to the lake sediment after step (2), the sediment accounts for 5% of the total mass of the sediment and zeolite mixture, mix well, then add sodium chloride solution and a mixed solution of magnesium hydroxide solution, the amount of the mi...

Embodiment 2

[0063] The method for using the modified nitrogen-controlling material prepared from lake sediments described in this embodiment comprises the following steps:

[0064] (1) Collect lake sediments, freeze-dry, grind through a 200-mesh sieve, and set aside; wherein, the SiO in the lake bottom mud 2 Content is 30%, Al 2 0 3 Content is 30%, Fe 2 o 3 The CaO content is 30%, the CaO content is 1%, and the others are 9%; the loss on ignition of the lake bottom mud is 30.8%;

[0065] (2) Take the lake sediment treated in step (1) and place it in a muffle furnace for constant temperature heating treatment, the heating temperature is 900°C, heat for 3.5 hours, then cool to room temperature, and set aside;

[0066](3) Add zeolite in proportion to the lake sediment after step (2), the sediment accounts for 90% of the total mass of the sediment and zeolite mixture, mix well, then add magnesium chloride solution and hydrogen The mixed solution of sodium oxide solution, the added amount...

Embodiment 3

[0068] The method for using the modified nitrogen-controlling material prepared from lake sediments described in this embodiment comprises the following steps:

[0069] (1) collect lake sediment, through freeze-drying, grind through 50 mesh sieves, for subsequent use;

[0070] (2) Take the lake sediment treated in step (1) and place it in a muffle furnace for constant temperature heating treatment. The heating temperature is 100° C., heated for 1 hour, then cooled to room temperature, and set aside;

[0071] (3) Add zeolite in proportion to the lake sediment after step (2), the sediment accounts for 80% of the total mass of the sediment and zeolite mixture, mix well, then add calcium chloride solution and a mixed solution of potassium hydroxide solution, the amount of the mixed solution added is 20 times the volume of the sediment after the step (2) is processed, and the concentration of calcium chloride in the mixed solution is 0.5mg / L , adjust the pH value of the mixed solu...

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Abstract

The invention relates to a modified nitrogen control material prepared from lake sediments, a preparation method and application thereof. The method includes: collecting lake sediments, conducting freeze drying, grinding and sieving for standby use; then subjecting the treated lake sediments to constant temperature heating treatment, then performing cooling, and adding zeolite into the sediments in proportion, mixing the materials evenly, then adding a mixed solution of a salt solution and an alkaline solution, carrying out oscillation impregnation modification, then conducting filtering and cooling to obtain residue, i.e. the sediment modified nitrogen control material. The method provided by the invention adopts lake sediments as the raw materials, the prepared modified nitrogen control material has significantly enhanced ammonia nitrogen adsorption performance, especially has good ammonia nitrogen removal effect on lake sediment interstitial water, the materials are cheap, the safety is high, the social and economical benefits are good, also the material has no ecological risk to lake water, is energy saving and environment-friendly, and can be applied to the lake sediment-water interface nitrogen pollution control field.

Description

technical field [0001] The invention belongs to the technical field of ammonia nitrogen release resistance control, and in particular relates to a modified nitrogen control material prepared from lake sediments, a preparation method and application thereof. Background technique [0002] Ammonia nitrogen is an important pollutant in water bodies, mainly from various industrial wastewater and urban domestic wastewater. Excessive ammonia nitrogen content in the water body can cause eutrophication of the water body, have a toxic effect on aquatic organisms, cause black and odorous water bodies, deteriorate the quality of the water environment, increase the difficulty and cost of water supply treatment, and thus affect human health. Sediment, also known as bottom mud, is an important destination and reservoir for pollutants entering rivers, lakes and other surface water bodies, and is also the internal source of overlying water pollution. Especially when exogenous pollution is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28C02F101/16
CPCB01J20/0248B01J20/041B01J20/06B01J20/103C02F1/281C02F2101/16C02F2103/007
Inventor 焦立新王圣瑞汪淼赵海超
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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