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Preparation method and application of Fe/C composite carrier nitrogen and phosphorus removal material based on limonite

A composite carrier, denitrification and phosphorus removal technology, applied in chemical instruments and methods, alkali metal compounds, water/sewage treatment, etc., can solve problems such as high price and limited adsorption capacity, achieve high porosity, reduce preparation cost, The effect of reducing production costs

Pending Publication Date: 2020-11-17
安徽久吾天虹环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A lot of research has been done on the methods of phosphorus removal at home and abroad, and the adsorption method is widely used. The commonly used adsorbents include calcite, modified bentonite, attapulgite clay, red mud, fly ash, etc. Although the adsorption of phosphorus has certain effect, but the adsorption capacity is limited; in order to improve the adsorption capacity of the phosphorus removal adsorbent, many scholars load some rare earth elements on the above-mentioned carrier to improve its adsorption capacity, although the adsorption material modified by rare earth elements has the best effect, but it is expensive

Method used

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  • Preparation method and application of Fe/C composite carrier nitrogen and phosphorus removal material based on limonite
  • Preparation method and application of Fe/C composite carrier nitrogen and phosphorus removal material based on limonite

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Limonite, straw and attapulgite clay were crushed and sieved to obtain powder with an aperture of 0.1-2mm, and the limonite powder, straw powder and attapulgite clay powder were mixed in a mass ratio of 2:2 : 1 mixed to get the mixture powder, add water to adjust the water content to 12%, put it in the ball forming plate, rotate at a speed of 400r / min for 2.5 hours to get the wet mixture granules, dry at 105°C for 5 hours to get the dry mixture granules, put them in a high temperature tube In a type furnace, calcined at 700°C for 20 hours under a nitrogen atmosphere to obtain a limonite-based Fe / C composite carrier denitrification and phosphorus removal material 1, such as figure 1 As shown, the material prepared by the present invention has a porous structure with a large pore size, such as figure 2 As shown, the porosity can be as high as 64%, and the grain strength can reach 58N,.

Embodiment 2

[0018] Example 2: Limonite, straw and attapulgite clay were crushed and sieved to obtain powder with an aperture of 0.1-2mm, and the limonite powder, straw powder and attapulgite clay powder were mixed in a mass ratio of 1:1 : 0.5 mixed to get the mixture powder, add water to adjust the water content to 12%, place it in a ball forming plate, rotate at a speed of 500r / min for 2.5 hours to obtain wet mixture particles, dry at 105°C for 5 hours to obtain dry mixture particles, place in a high temperature tube In a type furnace, calcined at 800°C for 20 hours under a nitrogen atmosphere to obtain a limonite-based Fe / C composite carrier denitrification and phosphorus removal material 2, such as figure 2 As shown, the porosity of the material prepared by the present invention can reach 40%, and the particle strength can reach 90N.

Embodiment 3

[0019] Example 3: Limonite, straw and attapulgite clay were crushed and sieved to obtain powder with an aperture of 0.1-2 mm, and the limonite powder, straw powder and attapulgite clay powder were mixed in a mass ratio of 1.5:1 : 0.5 mixed to get the mixture powder, add water to adjust the water content to 12%, put it in the ball forming plate, rotate at a speed of 450r / min for 2.5 hours to get the wet mixture granules, dry at 105°C for 5 hours to get the dry mixture granules, put them in a high temperature tube In a type furnace, calcined at 600°C for 20 hours under a nitrogen atmosphere to obtain a limonite-based Fe / C composite carrier denitrification and phosphorus removal material 3, such as figure 2 As shown, the material prepared by the present invention has a high porosity up to 78%, and a grain strength up to 54N.

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Abstract

The invention relates to a preparation method and application of a Fe / C composite carrier nitrogen and phosphorus removal material based on limonite. The Fe / C composite carrier nitrogen and phosphorusremoval material based on limonite is composed of limonite, straw and attapulgite clay. The limonite, the straw and the attapulgite clay are crushed to obtain limonite powder, straw powder and attapulgite clay powder respectively; the limonite powder. The straw powder and the attapulgite clay powder are mixed according to the mass ratio of (0.5-3): (0.5-2.5): (0.5-1) to obtain mixture powder; water is added to adjust the water content of the mixture powder to 10-25%; the mixture is placed in a balling disc; wet mixture particles are obtained after rotation at a speed of 400-700 r / min for 2-4h, and are dried at 105 DEG C to obtain dry mixture particles; the dry mixture particles are put into a high-temperature tubular furnace, and calcined for 18-24 hours at 500-1000 DEG C under the protective gas atmosphere to obtain the Fe / C composite carrier nitrogen and phosphorus removal material based on limonite, the material having a low preparation cost and good adsorption effect.

Description

technical field [0001] The invention relates to the field of environmental materials, in particular to a preparation method and application of a limonite-based Fe / C composite carrier denitrification and dephosphorization material. Background technique [0002] Due to my country's rapid economic development and accelerated urbanization, a large amount of nutrients nitrogen and phosphorus have entered lakes and other water bodies, resulting in serious eutrophication of lakes such as Chaohu Lake, Taihu Lake, Dianchi Lake and urban landscape water bodies. The country and society have invested huge sums of money in urban sewage Construction of treatment facilities to improve the treatment rate and effluent quality of urban domestic sewage. A lot of research has been done on the methods of phosphorus removal at home and abroad, and the adsorption method is widely used. The commonly used adsorbents include calcite, modified bentonite, attapulgite clay, red mud, fly ash, etc. Althoug...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/16
CPCB01J20/20B01J20/28016B01J20/3021B01J20/3028B01J20/3078C02F1/281B01J2220/4825B01J2220/4806C02F2101/105C02F2101/16
Inventor 李申何新张翔葛峰卢凯路怡涵
Owner 安徽久吾天虹环保科技有限公司
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