Sediment/zeolite nitrogen control material prepared from lake bottom mud and its method and application

A sediment and zeolite technology, applied in chemical instruments and methods, water/sludge/sewage treatment, silicon compounds, etc., can solve the problems of high cost, weak ammonia nitrogen adsorption, poor ecological safety, etc., to reduce ammonia nitrogen adsorption - Effect of desorption equilibrium concentration, reduction of adsorption-desorption equilibrium concentration, and improvement of ammonia nitrogen adsorption performance

Active Publication Date: 2019-06-14
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that the ammonia nitrogen controlled-release materials in the prior art are not strong in the adsorption of ammonia nitrogen, especially the application effect in the sediment-water interface nitrogen release resistance control is not obvious, and the cost is high and the ecological security is poor. Low benefit, and then provide a sediment / zeolite controller prepared from lake bottom mud with stronger adsorption capacity for ammonia nitrogen, especially better effect of resistance and control of ammonia nitrogen release at the sediment-water interface, and low cost, green environmental protection and high ecological security. Nitrogen materials, methods and applications

Method used

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  • Sediment/zeolite nitrogen control material prepared from lake bottom mud and its method and application
  • Sediment/zeolite nitrogen control material prepared from lake bottom mud and its method and application
  • Sediment/zeolite nitrogen control material prepared from lake bottom mud and its method and application

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Effect test

Embodiment 1

[0057] A method for preparing sediment / zeolite nitrogen-controlling materials from lake sediment described in this embodiment comprises the following steps:

[0058] (1) Collect lake bottom mud as raw material, freeze-dry, and grind through a 20-mesh sieve to obtain sediment powder for subsequent use; 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%;

[0059] (2) get zeolite, grind through 200 mesh sieves, obtain zeolite powder, for subsequent use;

[0060] (3) Put the sediment powder processed in step (1) into a muffle furnace for constant temperature heating treatment, the heating temperature is 50°C, heat for 0.5 hours, then cool to room temperature, and set aside;

[0061] (4) Add the zeolite powder in proportion to the sediment powder after step (3), the zeolite accounts for 95% of the total...

Embodiment 2

[0064] A method for preparing sediment / zeolite nitrogen-controlling materials from lake sediment described in this embodiment comprises the following steps:

[0065] (1) Collect lake bottom mud as raw material, freeze-dry, and grind through a 200-mesh sieve to obtain sediment powder for subsequent use; 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%;

[0066] (2) get zeolite, grind through 20 mesh sieves, obtain zeolite powder, for subsequent use;

[0067] (3) Place the sediment powder processed in step (1) 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;

[0068] (4) Add the zeolite powder in proportion to the sediment powder processed in step (3), the zeolite accounts for 8% of the total mass of...

Embodiment 3

[0071] A method for preparing sediment / zeolite nitrogen-controlling materials from lake sediment described in this embodiment comprises the following steps:

[0072] (1) collecting lake bottom mud as raw material, freeze-drying, and grinding through a 50-mesh sieve to obtain sediment powder for subsequent use;

[0073] (2) get zeolite, grind through 150 mesh sieves, obtain zeolite powder, for subsequent use;

[0074] (3) Place the sediment powder processed in step (1) in a muffle furnace for constant temperature heating treatment, the heating temperature is 100°C, heat for 1 hour, then cool to room temperature, and set aside;

[0075] (4) Add the zeolite powder in proportion to the Dianchi Lake sediment after the treatment in step (3), the zeolite accounts for 90% of the total mass of the mixed raw materials, mix evenly, and set aside;

[0076] (5) Add water to soak in the raw materials mixed in step (4), the amount of water added is 10% of the weight of the raw materials mix...

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Abstract

The invention relates to a sediment / zeolite nitrogen control material prepared from lake sediment, a method and application thereof. The method includes: collecting lake sediment as the raw material, conducting freeze drying, grinding and sieving to obtain sediment powder for standby use; taking zeolite, conducting grinding and sieving to obtain zeolite powder for standby use; then subjecting the treated sediment powder to constant temperature heating treatment, and then performing cooling for standby use; adding the zeolite powder into the sediment powder in proportion, mixing the substances evenly, then adding water to infiltrate the mixed raw materials, carrying out extrusion molding and roasting so as to obtain the sediment / zeolite nitrogen control material. The method provided by the invention adopts lake sediment as the raw material, and combines zeolite, so that the sediment / zeolite nitrogen control material has significantly improved ammonia nitrogen adsorption performance and significantly decreased ammonia nitrogen desorption capacity. The raw 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 significantly reduce the ammonia nitrogen concentration of sediment interstitial water in the application process to achieve the purpose of impeded control of lake sediment ammonia nitrogen release.

Description

technical field [0001] The invention belongs to the technical field of lake bottom mud pollution control, and in particular relates to a sediment / zeolite nitrogen control material prepared by using lake bottom mud, a method and an application. 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 effectively con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/10B01J20/16B01J20/30C02F101/16
Inventor 焦立新王圣瑞汪淼赵海超
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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