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Forsterite adsorbent for sewage treatment and preparation method thereof

A technology for forsterite and sewage treatment, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. Liquid is difficult to separate and other problems, to achieve good recycling effect, good adsorption effect, and stable performance

Inactive Publication Date: 2016-07-20
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Natural non-metallic minerals have high density and limited specific surface area;
[0005] 2. The surface of natural non-metallic minerals is mostly negatively charged, which limits its ability to adsorb heavy metal ions;
[0006] 3. Directly using natural non-metallic powder ore such as clay minerals as an adsorbent will have the problem of difficult separation of solid and liquid after adsorption
A large amount of fine powder cannot be used, and the factory has to use fine powder for trench filling, resulting in a waste of resources
The fine powder produced by the wet production line drifts away with the river water, causing serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A forsterite adsorbent for sewage treatment and a preparation method thereof. 50-60wt% forsterite fine powder, 25-30wt% attapulgite clay and 15-20wt% ferric oxide magnetic powder are used as raw materials, and 50-55wt% of the raw materials are added as a pore-forming agent, mixed evenly, The mixture is obtained; the mixture is placed in a granulator, and 20 to 25 wt% of water is added to the mixture, and granulated to obtain a spherical green body with a particle diameter of 3 to 4 mm; the spherical green body is ground at 80 drying at ~100°C for 18-20 hours, and firing at 950-1000°C for 1-2 hours to obtain a forsterite-based adsorbent for sewage treatment.

[0030] The pore-forming agent described in this example is sawdust.

[0031] The particle compressive strength of the forsterite-based adsorbent for sewage treatment prepared in this example is 105-120N; under the condition that no modification is required: NH 3 -N removal rate is 90~93%, phosphorus removal rate ...

Embodiment 2

[0033]A forsterite adsorbent for sewage treatment and a preparation method thereof. 60-70wt% of forsterite fine powder, 20-25wt% of attapulgite clay and 10-15wt% of ferric oxide magnetic powder are used as raw materials, and 55-60wt% of pore-forming agent of the raw materials is added, and the mixture is uniform. That is, the mixture is obtained; the mixture is placed in a granulator, 25-30wt% water of the mixture is added, and granulated to obtain a spherical green body with a particle size of 4-5 mm; the spherical green body is placed at 100 Drying at ~120℃ for 20 ~ 22h, and firing at 1000 ~ 1050℃ for 2 ~ 3h to obtain forsterite adsorbent for sewage treatment.

[0034] The pore-forming agent described in this example is bran.

[0035] The particle compressive strength of the forsterite adsorbent for sewage treatment prepared in this example is 100-115N; under the condition that no modification is required: NH 3 -N removal rate is 92~95%, phosphorus removal rate is 80~87%, ...

Embodiment 3

[0037] A forsterite adsorbent for sewage treatment and a preparation method thereof. 70-80wt% of forsterite fine powder, 10-15wt% of attapulgite clay and 10-15wt% of ferric oxide magnetic powder are used as raw materials, and 60-65wt% of pore-forming agent of the raw materials is added, and the mixture is uniform. That is, the mixture is obtained; the mixture is placed in a granulator, 20-25wt% water of the mixture is added, and granulated to obtain a spherical green body with a particle size of 3-4 mm; the spherical green body is placed at 80 Drying at ~100℃ for 22 ~ 24h, and firing at 1050 ~ 1100℃ for 3 ~ 4h to obtain forsterite adsorbent for sewage treatment.

[0038] The pore-forming agent described in this example is carbon powder.

[0039] The particle compressive strength of the forsterite adsorbent for sewage treatment prepared in this example is 120-135N; under the condition that no modification is required: NH 3 -N removal rate is 94~98%, phosphorus removal rate is...

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Abstract

The invention relates to a forsterite adsorbent for sewage treatment and a preparation method thereof. According to the technical solution, the preparation method comprises the following steps: by taking 50 to 80 percent by weight of forsterite fine powder, 10 to 30 percent by weight of attapulgite clay and 10 to 20 percent by weight of ferroferric oxide magnetic powder as raw materials, adding 50 to 65 percent by weight of a hole-forming agent to the raw materials, and uniformly mixing to obtain a mixture; putting the mixture in a granulator, adding 20 to 30 percent by weight of water to the mixture, and granulating to obtain spherical blanks having a particle size of 3 to 5mm; drying the spherical blanks at 80 to 120 DEG C for 18 to 24 hours and firing at 950 to 1150 DEG C for 1 to 5 hours to obtain the forsterite adsorbent for sewage treatment. The forsterite adsorbent for sewage treatment is cheap and easily available in raw materials, and has the characteristics of simple preparation process and environmental friendliness. The forsterite adsorbent for sewage treatment is large in specific surface area, high in strength and free of modification, and has a good adsorption effect on heavy metal ions and phosphate.

Description

technical field [0001] The invention belongs to the technical field of adsorbents for sewage treatment. In particular, it relates to a forsterite adsorbent for sewage treatment and a preparation method thereof. Background technique [0002] With the acceleration of urbanization, my country's water resources are seriously polluted, and the situation of water resources is becoming increasingly severe. The excessive discharge of urban sewage not only destroys the ecological environment of the city, but also hinders the sustainable development of the city. Pollutants in urban sewage, such as heavy metal ions and phosphorus-containing compounds, cause serious pollution to water bodies. Heavy metal ions cannot be biodegraded. Heavy metal ions in water enter aquatic organisms, and then enter the human body through the food chain, where they accumulate. People's health is threatened; excessive discharge of phosphorus compounds can lead to eutrophication of water bodies and "red ti...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28
CPCB01J20/12B01J20/06B01J20/28016C02F1/281C02F1/288
Inventor 李淑静李桂娟李远兵徐娜娜
Owner WUHAN UNIV OF SCI & TECH
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