Method for preparing modified biochar from plant waste and application

A technology of plant waste and biochar, applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., can solve the problem of low P adsorption effect, achieve hydrophilicity and polarity enhancement, The effect of short processing cycle and simple operation

Inactive Publication Date: 2021-04-09
SUN YAT SEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN110756166A discloses a corncob loaded magnesium modified adsorption materi

Method used

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  • Method for preparing modified biochar from plant waste and application
  • Method for preparing modified biochar from plant waste and application

Examples

Experimental program
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Example Embodiment

[0036]Example 1 Modified bioprocarbon having a phosphate absorbent prepared by agricultural waste residue ramie leaves

[0037]The collected residue ramie leaves were washed, dried, pulverized, over 80 mesh sieve, 65 ° C for a constant weight to obtain powder, magnesium chloride solution and ramie lust powder for mixing, wherein the mass ratio of magnesium ions and ramie lunar powder It was 0.12: 1, and the mixed solution was placed in a gas bath constant temperature oscillate, continuously oscillating at 25 ° C for 24 h, followed by steaming the solution to near viscous shape under the magnetic agitator 120 rpm, 80 ° C, transferred to the blast The drying tank was dried at 105 ° C for one night. After the removal of the high-speed multifunctional pulverizer, it was 0.5 mm sieve, and finally placed in the electric thermal tube furnace, and the pyrolysis reaction was carried out in a nitrogen environment. The conditions were a reaction temperature of 500 ° C, and the reaction time was 2...

Example Embodiment

[0038]Example 2 Modified bioprocarbon having a phosphate adaptive prepared by agricultural waste residue ramie leaves

[0039]The collected residue ramie leaves were washed, dried, pulverized, over 80 mesh sieve, 65 ° C for a constant weight to obtain powder, magnesium chloride solution and ramie lust powder for mixing, wherein the mass ratio of magnesium ions and ramie lunar powder It was 0.24: 1, and the mixed solution was placed in a gas bath constant temperature shock tank, continuously oscillated at 25 ° C for 24 h, followed by steaming the solution to the near viscous shape under the conditions of magnetic stirrer 120 rpm, 80 ° C, transferred to the blast The drying tank was dried at 105 ° C for one night. After the removal of the high-speed multifunctional pulverizer, it was 0.5 mm sieve, and finally placed in the electric thermal tube furnace, and the pyrolysis reaction was carried out in a nitrogen environment. The conditions were a reaction temperature of 500 ° C, and the rea...

Example Embodiment

[0040]Example 3 Modified bioprocarbon having a phosphate absorbent prepared by agricultural waste residue ramie leaves

[0041]The collected residue ramie leaves were washed, dried, pulverized, over 80 mesh sieve, 65 ° C for a constant weight to obtain powder, magnesium chloride solution and ramie lust powder for mixing, wherein the mass ratio of magnesium ions and ramie lunar powder It was 0.48: 1, and the mixed solution was placed in a gas bath constant temperature oscillating box, and the solution was continuously turned 24 h at 25 ° C, followed by steaming the solution to the near viscous shape under the conditions of the magnetic agitator 120 rpm, 80 ° C, transferred to the blast The drying tank was dried at 105 ° C for one night. After the removal of the high-speed multifunctional pulverizer, it was 0.5 mm sieve, and finally placed in the electric thermal tube furnace, and the pyrolysis reaction was carried out in a nitrogen environment. The conditions were a reaction temperature...

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Abstract

The invention discloses a method for preparing modified biochar from plant waste and application of the modified biochar. The method comprises the following steps: fully mixing and infiltrating plant dry powder, a magnesium salt and water, performing drying, fully grinding the mixture, and carrying out pyrolytic reaction in a nitrogen atmosphere to obtain the modified biochar. Compared with other carbon-based adsorbents of the same type, the modified biochar prepared through the method has good adsorption performance on phosphate; the technology provided by the invention has the characteristics of low energy consumption, simple operation and short treatment period in plant waste treatment and resource utilization, and can fully realize the goals of reduction, harmlessness and resource utilization of biomass solid wastes.

Description

technical field [0001] The invention relates to the technical field of utilizing biochar to adsorb phosphate, and more specifically relates to a method and application for preparing modified biochar from plant waste. Background technique [0002] With the increase of human industrial and agricultural production activities, a large amount of nutrient elements in closed or semi-closed water bodies such as lakes, reservoirs and bays are enriched, which promotes the vigorous growth of autotrophic organisms, especially algae such as cyanobacteria and red algae. Rapid reproduction and shorter growth cycle, so water eutrophication is another prominent problem currently facing our country. After algae and other plankton die, they are decomposed by aerobic microorganisms, which continuously consume dissolved oxygen in the water, or are decomposed by anaerobic microorganisms, and continuously produce hydrogen sulfide and other gases, which deteriorate the water quality from two aspect...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/10
CPCB01J20/04B01J20/041B01J20/20C02F1/281C02F1/283C02F2101/105
Inventor 何超张悦康黄伟明仇荣亮汤叶涛
Owner SUN YAT SEN UNIV
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