Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof

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

Active Publication Date: 2016-10-12
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. Lo

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  • Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof
  • Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof
  • Sediment/zeolite nitrogen control material prepared from lake sediment, method and application thereof

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Embodiment 1

[0057] The method for preparing sediment / zeolite nitrogen control material using lake sediment described in this embodiment includes the following steps:

[0058] (1) Collect lake sediment as raw material, freeze-dried, grind through 20 mesh sieve, and obtain sediment powder for use; wherein, the Al in the lake sediment 2 0 3 The content is 30%, Fe 2 O 3 The content is 10%, the CaO content is 20%, the MgO content is 8%, K 2 O content is 1%, others are 31%; the loss on ignition of the lake sediment is 30.43%;

[0059] (2) Take the zeolite and grind it through a 200-mesh sieve to obtain zeolite powder for use;

[0060] (3) Take the sediment powder treated in step (1) and place it in a muffle furnace for constant temperature heating treatment, the heating temperature is 50° C., heating for 0.5 hours, and then cooling to room temperature for use;

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

Embodiment 2

[0064] The method for preparing sediment / zeolite nitrogen control material using lake sediment described in this embodiment includes the following steps:

[0065] (1) Collect lake bottom mud as a raw material, freeze-dry, grind through a 200-mesh sieve, and obtain sediment powder for use; wherein, the SiO in the lake bottom mud 2 The content is 30%, Al 2 0 3 The content is 30%, Fe 2 O 3 The content is 30%, the content of CaO is 1%, and the other is 9%; the loss on ignition of the lake sediment is 30.8%;

[0066] (2) Take the zeolite and grind it through a 20-mesh sieve to obtain zeolite powder for use;

[0067] (3) Take the sediment powder treated in step (1) and place it in a muffle furnace for constant temperature heating treatment, the heating temperature is 900° C., heating for 3.5 hours, and then cooling to room temperature for use;

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

Embodiment 3

[0071] The method described in this embodiment for preparing sediment / zeolite nitrogen control material using lake sediment includes the following steps:

[0072] (1) Collect lake sediment as raw material, freeze-dry, grind through a 50-mesh sieve, and obtain sediment powder for use;

[0073] (2) Take the zeolite and grind it through a 150-mesh sieve to obtain zeolite powder for use;

[0074] (3) Take the sediment powder treated in step (1) and place it in a muffle furnace for constant temperature heating treatment, the heating temperature is 100°C, heating for 1 hour, and then cooling to room temperature for use;

[0075] (4) Add the zeolite powder in proportion to the Dianchi sediment treated in step (3), the zeolite accounts for 90% of the total mass of the mixed raw materials, and the mixture is evenly mixed for use;

[0076] (5) Add water to infiltrate the raw materials mixed in step (4), the added water amount is 10% of the weight of the mixed raw materials, extruded into a spheri...

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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 sediment pollution control, and specifically relates to a sediment / zeolite nitrogen control material prepared by using lake sediment and a method and application. Background technique [0002] Ammonia nitrogen is an important pollutant in water bodies, mainly from various industrial wastewater and urban domestic sewage. Excessive ammonia nitrogen content in the water body can cause eutrophication of the water body, have a toxic effect on aquatic organisms, cause the water body to black and smell, deteriorate the water environment quality, increase the difficulty and cost of water treatment, and 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 it is also an internal source of overlying water pollution. Especially when the external source of pollution is effectively controlled or comp...

Claims

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Application Information

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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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