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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

Inactive Publication Date: 2016-07-20
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation methods of biochar composites loaded with iron are relatively complicated and expensive

Method used

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  • Method for preparing modified biochar with aquatic plant waste and hematite
  • Method for preparing modified biochar with aquatic plant waste and hematite
  • Method for preparing modified biochar with aquatic plant waste and hematite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0037] (1) Naturally air-dry the reeds so that the internal moisture content is lower than 10%, then pulverize them with a pulverizer and pass through a 100-mesh sieve to obtain reed powder.

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

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

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

[0041] (5) Weigh 100g of the reed and hematite mixture in step (4), place the mixed sample in a box-type atmosphere furnace, and feed nitrogen gas with a flow rate of 400mL / min into the furnace to maintai...

Embodiment A2

[0043] (1) Naturally air-dry the cattails so that the internal moisture content is lower than 10%, then pulverize them with a pulverizer and pass through a 100-mesh sieve to obtain cattail powder.

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

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

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

[0047] (5) Weigh the full mixture of 100g of cattail and hematite described in step (4), place the mixed sample in a box-type atmosphere furnace, and feed nitrogen gas with a flow...

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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.

Description

technical field [0001] The invention belongs to the field of biochar adsorption materials, and relates to a method for preparing biochar by utilizing aquatic plant waste and hematite. Background technique [0002] With the rapid development of social economy, a large amount of waste water and farmland runoff are discharged into natural water bodies, resulting in the continuous increase of nutrient content in water bodies, and the problem of eutrophication is becoming more and more serious. Among them, anions such as nitrate and phosphate in water nutrients are the main forms of nutrients in water, so there are many methods for removing nitrate and phosphate in water. [0003] One of the more effective methods recognized at present is aquatic phytoremediation, but aquatic plants will wither and decompose in autumn and winter, causing secondary pollution to water bodies. How to deal with the litter of aquatic plants in the period of decline and improve the utilization rate of...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28
CPCB01J20/06B01J20/20B01J2220/4875C02F1/283
Inventor 王博杨登越李法云范志平陈鑫王迦欣郭仕林
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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