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Modified bio-carbon and preparation method thereof

A biochar, modified technology, applied in chemical instruments and methods, other chemical processes, and the restoration of polluted soil, to achieve the effect of reducing content, increasing yield, and simple components

Active Publication Date: 2018-07-10
IRONMAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, studies have reported that adding biochar can improve the microenvironment of rice rhizosphere and promote the formation of iron film on the root surface, and the concentrations of Cd, Zn and Pb in rice roots can be reduced by 98%, 83% and 72%, respectively. However, the concentration of arsenic Concentration increased by 327%

Method used

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  • Modified bio-carbon and preparation method thereof
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  • Modified bio-carbon and preparation method thereof

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preparation example Construction

[0026] The invention provides a kind of preparation method of modified biochar, is characterized in that, comprises the following steps:

[0027] S1: drying and pulverizing the bagasse to a particle size of less than 0.2mm to obtain sugarcane powder;

[0028] S2: adding the sugarcane powder in step S1 into the iron solution, and stirring with a mixer to obtain a sugarcane mixture;

[0029] S3: Dry the sugarcane mixture in step S2, and place the dried sugarcane mixture in an atmosphere furnace for carbonization, wherein a protective gas is introduced into the atmosphere furnace to raise the temperature by 15°C-30°C per minute, so that The temperature is raised to 300°C-500°C and kept for 1h-3h to obtain the primary product of biochar;

[0030] S4: Add the primary product of biochar in step S3 to the mixed solution of nitrogen, phosphorus, potassium and silicon, and shake for 1-3 hours to obtain a biochar mixture;

[0031] S5: adding chitosan and biological starch into the bio...

Embodiment 1

[0044] A preparation method of modified biochar, comprising the following steps:

[0045] S1: drying and pulverizing the bagasse to a particle size of less than 0.2mm to obtain sugarcane powder;

[0046] S2: Add 100 grams of sugarcane powder in step S1 to a concentration of 1 liter of iron solution, and stir with a mixer to obtain a sugarcane mixture, wherein the iron solution contains 12.08 grams of FeCl 3 ·H 2 O;

[0047] S3: drying the sugarcane mixture in step S2, and placing the dried sugarcane mixture in an atmosphere furnace for carbonization, wherein protective nitrogen and oxygen are introduced into the atmosphere furnace, wherein the volume ratio of nitrogen and oxygen is 30:1, the temperature is increased by 15°C per minute, so that the temperature is raised to 300°C and kept for 3 hours to obtain the primary product of biochar;

[0048] S4: Add the primary product of biochar in step S3 to 5 liters of nitrogen, phosphorus, potassium and silicon mixed solution, an...

Embodiment 2

[0051] A preparation method of modified biochar, comprising the following steps:

[0052] S1: drying and pulverizing the bagasse to a particle size of less than 0.2mm to obtain sugarcane powder;

[0053] S2: Add 100 grams of sugarcane powder in step S1 to a concentration of 1 liter of iron solution, and stir with a mixer to obtain a sugarcane mixture, wherein the iron solution contains 24.15 grams of FeCl 3 ·H 2 O;

[0054] S3: drying the sugarcane mixture in step S2, and placing the dried sugarcane mixture in an atmosphere furnace for carbonization, wherein protective nitrogen and oxygen are introduced into the atmosphere furnace, wherein the volume ratio of nitrogen and oxygen is 25:1, the temperature was increased by 15°C per minute, so that the temperature was raised to 300°C and kept for 2.7 hours to obtain the primary product of biochar;

[0055] S4: Add the primary product of biochar in step S3 to 5 liters of nitrogen, phosphorus, potassium and silicon mixed solution...

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Abstract

The invention discloses a modified bio-carbon preparation method thereof. The preparation method takes bagasse as a raw material, bagasse is subjected to resource utilization, the bagasse is used forpreparing the modified bio-carbon with characteristics of small particle size, large specific surface area, and prominent micropore structure, more nutrition ions such as iron, nitrogen, phosphor, potassium and silicon are absorbed in micropore, the nutrition ions in the micropore can be displaced to cadmium and arsenic ions, and the cadmium and arsenic content in soil can be reduced. The modifiedbio-carbon has the advantages of simple component and low cost, contains nutrient elements required by plant, contains components for solidifying cadmium and arsenic, can reduces absorption of cadmium and arsenic by the plant, and increases the plant output.

Description

technical field [0001] The invention relates to the technical field of environmental protection engineering, in particular to a modified biochar and a preparation method thereof. Background technique [0002] In heavy metal-polluted soil, arsenic-cadmium complex pollution is a prominent problem. About one-sixth of the paddy fields are subject to varying degrees of arsenic-cadmium complex pollution, and the polluted area is increasing year by year. Mine mining and smelting are the main ways of combined soil arsenic and cadmium pollution. Waste slag and tailing sand usually contain high concentrations of arsenic and cadmium waste ore or tailings. After natural weathering and rain erosion, arsenic and cadmium will be released into the soil. As a result, the soil is severely polluted by arsenic and cadmium compounds. Excessive cadmium and arsenic will cause gradual variation of soil biological characteristics, resulting in a decline in soil quality. Moreover, the biomobility a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B09C1/00
CPCB01J20/20B01J20/24B01J2220/4825B09C1/00
Inventor 杨启豪李芳柏黄石光刘传平李清秀
Owner IRONMAN ENVIRONMENTAL TECH CO LTD
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