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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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] CN110756166A discloses a corncob loaded magnesium modified adsorption material and its preparation method and application, but the adsorption effect on P is low

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
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Modified biochar with phosphate adsorbent prepared from agricultural waste residue ramie leaves

[0037] The collected residual ramie leaves are washed, dried, crushed, passed through a 80-mesh sieve, and dried at 65°C to a constant weight to prepare a powder. The magnesium chloride solution is mixed with the ramie leaf powder. The mass ratio of magnesium ions to ramie leaf powder is 0.12:1, the mixed solution was placed in an air bath constant temperature shaking box, and was continuously shaken at 160rpm at 25°C for 24h, and then the solution was evaporated to a nearly viscous state under the conditions of 120rpm and 80°C with a magnetic stirrer, and then transferred to a blower Dry in a drying oven overnight at 105°C, take it out, crush it with a high-speed multifunctional pulverizer for 2 minutes, pass through a 0.5mm sieve, and finally place it in an electric heating tube furnace for pyrolysis, and carry out pyrolysis reaction in a nitrogen environment. T...

Embodiment 2

[0038] Example 2 Modified biochar with phosphate adsorbent prepared from agricultural waste residue ramie leaves

[0039] The collected residual ramie leaves are washed, dried, crushed, passed through a 80-mesh sieve, and dried at 65°C to a constant weight to prepare a powder. The magnesium chloride solution is mixed with the ramie leaf powder. The mass ratio of magnesium ions to ramie leaf powder is 0.24:1, the mixed solution was placed in an air bath constant temperature shaking box, and was continuously shaken at 160rpm at 25°C for 24h, and then the solution was evaporated to a nearly viscous state under the conditions of a magnetic stirrer at 120rpm and 80°C, and then transferred to a blower Dry in a drying oven overnight at 105°C, take it out, crush it with a high-speed multifunctional pulverizer for 2 minutes, pass through a 0.5mm sieve, and finally place it in an electric heating tube furnace for pyrolysis, and carry out pyrolysis reaction in a nitrogen environment. The...

Embodiment 3

[0040] Example 3 Modified biochar with phosphate adsorbent prepared from agricultural waste residue ramie leaves

[0041]The collected residual ramie leaves are washed, dried, crushed, passed through a 80-mesh sieve, and dried at 65°C to a constant weight to prepare a powder. The magnesium chloride solution is mixed with the ramie leaf powder. The mass ratio of magnesium ions to ramie leaf powder is 0.48:1, put the mixed solution in an air bath constant temperature shaking box, and continuously shake it at 160rpm at 25°C for 24h, then evaporate the solution to a nearly viscous state under the conditions of 120rpm and 80°C on a magnetic stirrer, and transfer it to a blower Dry in a drying oven overnight at 105°C, take it out, crush it with a high-speed multifunctional pulverizer for 2 minutes, pass through a 0.5mm sieve, and finally place it in an electric heating tube furnace for pyrolysis, and carry out pyrolysis reaction in a nitrogen environment. The conditions are as follo...

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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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