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Nitrogen controlling material prepared based on lake sediment, preparation method and application thereof

A technology for sediments and lakes, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. problem, to achieve the effect of being beneficial to growth and repair, improving ammonia nitrogen adsorption performance, and improving background structure

Inactive 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 ammonia nitrogen release prevention and control materials in the prior art have high cost, poor ecological safety and limited ammonia nitrogen control release effect, and then provide a cheap, green, high ecological safety and ammonia nitrogen control material. Nitrogen control material prepared from lake sediment with strong release effect and its preparation method and application

Method used

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  • Nitrogen controlling material prepared based on lake sediment, preparation method and application thereof
  • Nitrogen controlling material prepared based on lake sediment, preparation method and application thereof
  • Nitrogen controlling material prepared based on lake sediment, preparation method and application thereof

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Embodiment 1

[0050] The method for preparing nitrogen-controlling materials based on lake sediment described in this embodiment includes the following steps:

[0051] (1) Collect lake bottom mud as raw material, freeze-dry, grind through a 20-mesh sieve, and set aside; wherein, the SiO in the lake bottom mud 2 The content is 22.92%, Al 2 0 3 The content is 44.56%, Fe 2 o 3 content of 22.01%, CaO content of 5.13%, MgO content of 2.81%, K 2 O content is 0.46%, TiO 2 The content is 2.11%; the loss on ignition of the lake bottom sediment is 30.43%;

[0052] (2) Take the lake bottom sludge treated in step (1) and place it in a muffle furnace for constant temperature heating treatment. The heating temperature is 50° C., heated for 0.5 hour, and then cooled to room temperature to obtain the final product.

Embodiment 2

[0054] The method for preparing nitrogen-controlling materials based on lake sediment described in this embodiment includes the following steps:

[0055] (1) Collect lake bottom mud as raw material, freeze-dry, grind through a 200-mesh sieve, and set aside; wherein, the SiO in the lake bottom mud 2 Content is 20%, Al 2 0 3 Content is 50%, Fe 2 o 3 content of 20%, CaO content of 8%, MgO content of 1%, K 2 O content is 0.1%, TiO 2 The content is 1.9%; the loss on ignition of the lake bottom sediment is 30.43%;

[0056] (2) Take the lake bottom sludge treated in step (1) and place it in a muffle furnace for constant temperature heating treatment at 900° C. for 3.5 hours, then cool to room temperature to obtain the final product.

Embodiment 3

[0058] The method for preparing nitrogen-controlling materials based on lake sediment described in this embodiment includes the following steps:

[0059] (1) Collect lake bottom mud as raw material, freeze-dry, grind through a 50-mesh sieve, and set aside; wherein, the SiO in the lake bottom mud 2 The content is 23.14%, Al 2 0 3 The content is 45.26%, Fe 2 o 3 content of 22.01%, CaO content of 5.13%, MgO content of 3%, K 2 O content is 0.46%, TiO 2 The content is 1%; the loss on ignition of the lake sediment is 30.43%;

[0060] (2) The lake bottom sludge treated in step (1) is placed in a muffle furnace for constant temperature heating treatment at 100° C. for 1 hour, and then cooled to room temperature to obtain the final product.

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Abstract

The invention relates to a nitrogen controlling material prepared based on lake sediment, a preparation method and application thereof. The preparation method includes: collecting lake sediment as the raw material, conducting freeze drying, grinding and sieving, then carrying out high temperature roasting for certain time, and performing cooling so as to obtain the nitrogen controlling material. According to the invention, lake sediment is adopted as the raw material, and is subjected to heat treatment to prepare the nitrogen controlling material. The nitrogen controlling material comes from lake sediment, not only has low price, but also has high safety, has no ecological risk to lake water, also the high temperature roasted sediment has the characteristics of strong ammonia nitrogen adsorption capacity and weak desorption, thus solving the problems of high cost of ammonia nitrogen controlled release materials, poor ecological safety and limited ammonia nitrogen controlled release effect in the prior art.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of ammonia nitrogen release, and in particular relates to a nitrogen control material prepared based on lake bottom mud, 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30C02F1/28
CPCB01J20/103C02F1/281
Inventor 王圣瑞焦立新汪淼赵海超
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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