Method for preparing modified biochar with aquatic plant waste and hematite

A technology of aquatic plants and hematite, which is applied in the field of biochar adsorption materials, can solve the problems of complex and expensive preparation methods, and achieve the effects of high adsorption performance, simple preparation methods, and excellent treatment effects

Inactive Publication Date: 2016-07-20

LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY

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AI-Extracted Technical Summary

Problems solved by technology

However, the existing preparation methods of biochar composi...

Abstract

The invention belongs to the field of biochar adsorbing materials, and relates to a method for preparing modified biochar with aquatic plant waste and hematite. The method includes the following steps: (1) naturally drying aquatic plants prior to crushing to obtain aquatic plant powder; (2) crushing the hematite to obtain hematite powder; (3) weighing the hematite powder prior to putting the hematite powder into deionized water, and performing ultrasonic treatment to obtain suspension; (4) weighing the aquatic plant powder, soaking the aquatic plant powder in the suspension, and stirring and drying to obtain fully mixed aquatic plant and hematite mixture; (5) weighing the fully mixed aquatic plant and hematite mixture, putting the mixture in a batch-type atmosphere furnace, and feeding nitrogen into the furnace; performing temperature programming to the target temperature, and maintaining final-temperature pyrolysis; after the pyrolysis process is finished, obtaining the target product, namely the modified biochar. The modified biochar has strong adsorbability in nitrate and phosphate, high in stability and reusable.

Application Domain

Other chemical processesWater/sewage treatment by sorption

Technology Topic

IonChemistry +9

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Examples

Experimental program(2)

Example Embodiment

[0036] Example Al.

[0037] (1) Air-dry the reeds to make the internal moisture content less than 10%, then pulverize the reeds through a 100-mesh sieve to obtain reed powder.

[0038] (2) After the hematite is pulverized by a pulverizer, the hematite is pulverized by grinding in a mortar, and then passed through a 100-mesh sieve to obtain hematite powder.

[0039] (3) Weigh 4g of hematite powder and put it in 100ml of deionized water. After 1h of post-treatment with an ultrasonic generator, a stable suspension is obtained.

[0040] (4) Weigh 40g of the reed powder described in step (1), soak it in the suspension of step (3), and stir it with a mixer for a certain period of time, then dry it at 80°C to obtain reed and red The iron ore is thoroughly mixed.

[0041] (5) Weigh 100g of reed and hematite in step (4) to fully mix, place the mixed sample in a box atmosphere furnace, and pour nitrogen at a flow rate of 400 mL/min into the furnace to maintain an oxygen-deficient environment in the furnace ; The program controls the heating rate of 10°C/min to continue heating to the target temperature of 500°C, and maintains the final temperature for pyrolysis for 20 minutes; after the pyrolysis process is over, the target product modified biochar is obtained.

Example Embodiment

[0042] Example A2.

[0043] (1) Dry the cattail in the air naturally to make the internal moisture content less than 10%, then pulverize it with a pulverizer and pass it through a 100-mesh sieve to obtain cattail powder.

[0044] (2) After the hematite is pulverized by a pulverizer, the hematite is pulverized by grinding in a mortar, and then passed through a 100-mesh sieve to obtain hematite powder.

[0045] (3) Weigh 4g of hematite powder and put it in 100ml of deionized water. After 1h of post-treatment with an ultrasonic generator, a stable suspension is obtained.

[0046] (4) Weigh 40g of cattail powder described in step (1), soak it in the suspension of step (3), and stir it with a mixer for a certain period of time, then dry it at 80°C to obtain cattail and red The iron ore is thoroughly mixed.

[0047] (5) Weigh the 100g cattails and hematite in step (4) to fully mix, place the mixed sample in a box-type atmosphere furnace, and inject nitrogen at a flow rate of 400 mL/min into the furnace to maintain an oxygen-deficient environment in the furnace ; The program controls the heating rate of 10°C/min to continue heating to the target temperature of 500°C, and maintains the final temperature for pyrolysis for 20 minutes; after the pyrolysis process is over, the target product modified biochar is obtained.

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Method for preparing modified biochar with aquatic plant waste and hematite

A technology of aquatic plants and hematite, which is applied in the field of biochar adsorption materials, can solve the problems of complex and expensive preparation methods, and achieve the effects of high adsorption performance, simple preparation methods, and excellent treatment effects

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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