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A preparation method based on biomass iron-based porous carbon composite adsorption material

A composite adsorption material, porous carbon technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc. problem, to achieve the effect of simple method, stable performance and large pH range

Active Publication Date: 2020-04-03
洛阳巴库生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although constructed wetlands can separate molybdenum from water bodies, there are uncontrollable risks such as pollution transfer in substrates and functional plants containing molybdenum; the chemical precipitation method has a good effect on the removal of medium and low concentration sewage, but the remaining sludge is difficult to treat and cannot be treated. Recycling; the ion exchange method can effectively separate the polluted molybdenum from the water body, and realize the multiple utilization of the resin through desorption, but the adaptability of the resin is poor, and the requirements for reaction control conditions such as pH value are high; the adsorption method mainly uses traditional materials Cheap materials enrich pollutants, but there is a problem of secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method based on biomass iron-based porous carbon composite adsorption material:

[0019] 1. Cut the palm fiber from the palm tree, wash 100 grams of palm fiber with water at room temperature for 5 times until no dust and other impurities are attached to the surface, dry it at 60°C, and cut it into 0.5 cm for later use.

[0020] 2. Put the short palm fibers in a sodium hydroxide solution with a concentration of 2 mol / L, stir for 60 minutes at a temperature of 80°C, filter, wash until the pH is about 7, dry and set aside.

[0021] 3. Pre-oxidize the alkali-treated palm silk at a temperature of 300°C for 2 hours in an air atmosphere, and then cool it to room temperature; 10°C / min until it is taken out at room temperature to obtain a porous carbon material. Soak the porous carbon material in a solution containing ferric chloride with a concentration of 1mol / L for 120 minutes, filter to wash away the ferric chloride on the surface, and again under the protecti...

Embodiment 2

[0024] A preparation method based on biomass iron-based porous carbon composite adsorption material:

[0025] 1. Cut the palm fiber from the palm tree, wash 50 grams of palm fiber with water at room temperature for 3 times until no dust and other impurities are attached to the surface, dry it at 50°C, and cut it into 1 cm for later use.

[0026] 2. Put the short palm fibers in a sodium hydroxide solution with a concentration of 1mol / L, stir for 120 minutes at a temperature of 120°C, filter, wash until the pH is about 7, dry and set aside.

[0027] 3. Pre-oxidize the alkali-treated palm fiber in an air atmosphere at a temperature of 400°C for 2 hours, and then cool it to room temperature; 10°C / min until it is taken out at room temperature to obtain a porous carbon material. Soak the porous carbon material in a solution containing ferric chloride and ferric sulfate with a concentration of 0.5mol / L for 90 minutes, filter, wash away the ferric chloride and ferric sulfate on the s...

Embodiment 3

[0030] A preparation method based on biomass iron-based porous carbon composite adsorption material:

[0031] 1. Cut the palm fiber from the palm tree, wash 200 grams of palm fiber with water at room temperature 4 times until no dust and other impurities are attached to the surface, dry it at 80°C, and cut it into 1.5 cm for later use.

[0032] 2. Put the short palm filaments in a sodium hydroxide solution with a concentration of 5 mol / L, stir for 90 minutes at a temperature of 60°C, filter, wash until the pH is about 7, dry and set aside.

[0033] 3. Pre-oxidize the alkali-treated palm fiber in an air atmosphere at a temperature of 200°C for 4 hours, then cool to room temperature; then under the protection of nitrogen, the heating rate is 5°C / min, and the temperature is raised to 800°C. 10°C / min until it is taken out at room temperature to obtain a porous carbon material. Soak the porous carbon material in a solution containing 3mol / L ferric sulfate for 100 minutes, filter t...

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Abstract

The invention relates to a preparation method of biomass Fe-based porous carbon composite adsorption material. Palm fibers are used as raw materials, and the method comprises the following steps: 1, palm fibers are washed, and dried at 50-80 DEG C and cut up; 2. palm fibers are placed in a sodium hydroxide solution, stirring and filtering are carried out, washing is carried out till pH value is neutral, and then drying is carried out; 3. preoxidation treatment of the palm fibers are carried out 200-400 DEG C under air atmosphere for 1-5 hours, cooling is carried out till the temperature is ata room temperature, heating rate is 1-5 DEG C / min, heating is carried out till the temperature is at 600-1200 DEG C, constant temperature treatment is carried out at 60-240 minutes, finally cooling rate is controlled at 2-10 DEG C / min and the materials are cooled to a room temperature and taken out, and the materials are immersed in a solution of ferric salt; after the immersion ends, filtering iscarried out, and then under protection of nitrogen, heating rate is 1-5 DEG C / min, heating is carried out till the temperature is at 500-800 DEG C, constant temperature treatment is carried out at 30-240 minutes, and finally the cooling rate is controlled at 2-10 DEG C / min, cooling is carried out till the temperature is at room temperature, and the composite adsorption material is obtained. The removal rate of adsorption materials for molybdate ions reaches 95% or above in a wider pH value range.

Description

technical field [0001] The invention relates to the technical field of heavy metal ion adsorption materials, in particular to a preparation method of a biomass-based iron-based porous carbon composite adsorption material. Background technique [0002] Environmental protection is a strategic task in my country's modernization drive and an inevitable requirement for sustainable development. In recent years, due to the continuous improvement of people's production and living standards, the circulation of heavy metals in nature has continued to increase, destroying the original biogeochemical balance, and the heavy metal content in some areas or regions has exceeded its environmental capacity. Industrial wastewater and urban life Sewage pollution and heavy metal pollution from mining and metallurgical industries have led to a sharp decline in the water quality of rivers and lakes. Water pollution is deepening day by day, leading to "water quality" water shortage, seriously affe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/0229B01J20/20C02F1/281C02F2101/10
Inventor 刘献明黄逸清刘向东
Owner 洛阳巴库生物科技有限公司
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