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Preparation method and application of composite modified straw active granule carbon adsorption material

A technology of composite modification and active particles, which is applied in the field of agricultural and forestry waste recycling and water treatment, can solve the problems of poor adsorption effect, easy slag drop, and difficult wave of modified straw biochar, so as to reduce eutrophication Phenomenon, the effect of improving the adsorption capacity

Active Publication Date: 2018-06-29
JIANGSU ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to develop a method for preparing a surface-loaded uniform nano-scale metal oxide, and at the same time, a composite modified straw active particle carbon adsorption material with large-scale porous channels. Technical problems such as waving hands, easy slag falling, and poor adsorption effect

Method used

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  • Preparation method and application of composite modified straw active granule carbon adsorption material
  • Preparation method and application of composite modified straw active granule carbon adsorption material
  • Preparation method and application of composite modified straw active granule carbon adsorption material

Examples

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Effect test

Embodiment 1

[0036] Example 1 Preparation of composite modified straw activated granular carbon adsorption material

[0037] A) Preparation of straw granular carbon

[0038] 1) Straw composite particles: Premix 1000g rice straw powder with a particle size of 40~60 mesh, 1500g distilled water, 100g methylcellulose, 125g nano-montmorillonite and 125g negative ion powder in a high-speed mixer for 30 minutes, and then transfer the materials To the turntable granulator, the inclination angle of the turntable is set to 30°, and the rotation speed is 20rpm for granulation to obtain straw composite granules with a particle size range of 0.5-6mm.

[0039] 2) Preparation of straw granular carbon: put the straw granular carbon in a tube furnace for pyrolysis at a heating rate of 5°C / min, and pyrolyze at 350°C for 6h;

[0040] B) Preparation of composite modified straw activated granular carbon

[0041] 1) Put 200mL magnesium chloride solution with a molar concentration of 0.85mol / L and 100mL ferric...

Embodiment 2

[0046] A) Preparation of straw granular carbon

[0047] 1) Straw composite granules: Premix 1000g coconut shell powder, 500g distilled water, 800g methyl cellulose and 200g methyl hydroxyethyl cellulose with a particle size of 40~60 mesh in a high-speed mixer for 5 minutes, and then transfer the materials to Turntable granulator, the inclination angle of the turntable is set to 60°, and the rotating speed is 60rpm for granulation to obtain straw composite granules with a particle size range of 0.5-6mm.

[0048] 2) Preparation of straw granular carbon: put the straw granular carbon in a tube furnace for pyrolysis at a heating rate of 10°C / min, and pyrolyze at 750°C for 1 hour;

[0049] B) Preparation of composite modified straw activated granular carbon

[0050] 1) Put 200mL magnesium chloride solution with a molar concentration of 0.55mol / L, 50mL ferric chloride solution with a molar concentration of 0.45mol / L, and 50mL aluminum chloride solution with a molar concentration of...

Embodiment 3

[0053] A) Preparation of straw granular carbon

[0054] 1) Straw composite particles: 1000g wheat straw powder with a particle size of 40~60 mesh, 800g distilled water, 400g methyl cellulose and 600g methyl hydroxyethyl cellulose, 150g nano-montmorillonite and 100g negative ion powder in a high-speed mixer The mixture was premixed for 15 minutes, and then the material was transferred to a turntable granulator. The inclination angle of the turntable was set at 45°, and the rotation speed was 40rpm for granulation to obtain straw composite granules with a particle size range of 0.5-6mm.

[0055] 2) Preparation of straw granular carbon: put the straw granular carbon in a tube furnace for pyrolysis at a heating rate of 8°C / min, and pyrolyze at 450°C for 4h;

[0056] B) Preparation of composite modified straw activated granular carbon

[0057] 1) Put 200mL magnesium chloride solution with a molar concentration of 0.55mol / L, 50mL ferric chloride solution with a molar concentration ...

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Abstract

The invention discloses a preparation method and application of a composite modified straw active granule carbon adsorption material. The preparation method of the composite modified straw active granule carbon adsorption material comprises the following steps: 1) mixing straw powder, distilled water, an adhesive and composite minerals, granulating the mixture, and then, putting the granules intoa tube furnace to be pyrolyzed to prepare straw granule carbon; 2) introducing inert gas into a modified reagent, adjusting the pH value of a solution to be 8-11, adding a ferric nitrate solution, andperforming reaction to obtain a composite modified solution; and 3) soaking the straw granule carbon in the composite modified solution for 30min, performing ultrasonic treatment for 1-12h at 1-8MPa,performing centrifugation and drying, putting the dried straw granule carbon into a muffle furnace to be fired for 2-8h at 200 DEG C, and performing cleaning and then drying to obtain the composite modified straw active granule carbon adsorption material. The composite modified straw active granule carbon has a good absorption effect on phosphate radicals in low-pollution water. The adsorption material is convenient to recover, is favorable for recycling of phosphorus resources, and has wide market application prospects.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and water treatment of agricultural and forestry waste, and in particular relates to a preparation method and application of a composite modified straw activated granular carbon adsorption material. Background technique [0002] Total phosphorus concentration (ρ(TP)), total nitrogen concentration (ρ(TN)) or COD Cr (COD Cr ) concentrations are often much higher than the Class V water quality standards of surface water environmental quality, and people call this type of water "low pollution water". These low-pollution waters are an important reason for the eutrophication of lakes, and the treatment of low-pollution waters has become a major environmental issue facing the world. Among the many pollution factors that cause water eutrophication, phosphorus is the most important controlling factor, that is, when ρ(TP)>0.02mg / L, the water body can start the process of eutrophication. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C01B32/348C05G3/00C05G3/08C02F101/10C05G3/90
CPCB01J20/12B01J20/20C02F1/283C05D5/00C05G3/00C02F2101/105C05G3/90C05F7/00B01J20/3078B01J20/3085B01J20/3042B01J20/305C05B17/00C02F1/286C02F1/288C05D9/02C05G5/40C05G3/40B01J2220/46C02F1/281C01B32/318
Inventor 孙恩惠靳红梅黄红英武国峰瞿清鲁智愚叶小梅常志州徐跃定
Owner JIANGSU ACAD OF AGRI SCI
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