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A kind of composite modified biochar stabilizer and its preparation method and application

A biomass charcoal and composite modification technology, applied in the environmental field, can solve the problems of high preparation cost, complicated construction process, long repair period, etc., and achieve simple and easy modification operation, low construction cost, and short stabilization period. Effect

Active Publication Date: 2021-09-21
浙江博世华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation and modification process of some biochars currently studied is relatively complicated, and the preparation cost is high, which is not conducive to practical engineering applications.
The amount of stabilizer applied is small, which cannot meet the standard requirements, and the amount applied is uneconomical, and there is also the problem that the restoration effect and economic efficiency cannot be considered
Some stabilization repair processes still have problems such as complicated construction process, high construction cost and long repair period.
[0007] The patent specification whose publication number is CN111303905A discloses a passivator suitable for farmland soil heavy metal pollution and a preparation method thereof. The principle is to use sodium lignosulfonate to react with Fe under specific reaction conditions 2+ Chelation, and the raw materials and preparation methods are relatively complicated

Method used

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  • A kind of composite modified biochar stabilizer and its preparation method and application
  • A kind of composite modified biochar stabilizer and its preparation method and application
  • A kind of composite modified biochar stabilizer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In parts by weight: 2 parts of modified biochar; 1 part of lime; 0.5 part of potassium dihydrogen phosphate. Stir the modified biochar, lime and potassium dihydrogen phosphate in a mixing equipment for 2 hours and mix evenly to obtain the composite modified biochar stabilizer FB1. The prepared stabilizer is stored indoors under sealed and dry conditions.

[0042] The preparation method of described modified biochar comprises steps:

[0043](1) Pass the biochar derived from agricultural waste corncobs through a 100-mesh sieve, and put the undersieve into FeSO with a concentration of 0.4mol / L according to the solid-to-liquid ratio of 1g:8mL 4 In the solution, add NaOH solution after mixing to adjust the pH of the mixture to 6, continue to stir for 15 minutes and then soak for 24 hours;

[0044] (2) Solid-liquid separation is carried out after soaking, and the resulting solid product is dried at 100°C to constant weight;

[0045] (3) The obtained dried product was crushe...

Embodiment 2

[0048] In parts by weight: 2 parts of modified biochar; 1.5 parts of lime; 1 part of potassium dihydrogen phosphate. Stir the modified biochar, lime and potassium dihydrogen phosphate in the mixing equipment for 1.5 hours and mix evenly to obtain the composite modified biochar stabilizer FB2. The prepared stabilizer is stored in a sealed and dry room .

[0049] The preparation method of described modified biochar comprises steps:

[0050] (1) The biochar sourced from agricultural waste corncobs is passed through a 100-mesh sieve, and the under-sieve is put into FeSO with a concentration of 0.5mol / L at a solid-to-liquid ratio of 1g:10mL 4 In the solution, add NaOH solution after mixing to adjust the pH of the mixture to 7, continue to stir for 30 minutes and then soak for 24 hours;

[0051] (2) Solid-liquid separation is carried out after soaking, and the obtained solid product is dried to constant weight at 105°C;

[0052] (3) The obtained dried product was crushed and pass...

Embodiment 3

[0055] In parts by weight: 4 parts of modified biochar; 1 part of lime; 0.5 part of potassium dihydrogen phosphate. Stir the modified biochar, lime and potassium dihydrogen phosphate in the mixing equipment for 1.5 hours and mix evenly to obtain the composite modified biochar stabilizer FB3. The prepared stabilizer is stored in a sealed and dry room .

[0056] The preparation method of described modified biochar comprises steps:

[0057] (1) Pass the biochar derived from agricultural waste corncobs through a 100-mesh sieve, and put the undersieve into FeSO with a concentration of 0.9mol / L according to the solid-to-liquid ratio of 1g:15mL 4 In the solution, add NaOH solution after mixing to adjust the pH of the mixture to 7, continue to stir for 30 minutes and then soak for 36 hours;

[0058] (2) Solid-liquid separation is carried out after soaking, and the obtained solid product is dried to constant weight at 105°C;

[0059] (3) The obtained dried product was crushed and pa...

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Abstract

The invention discloses a composite modified biochar stabilizer, a preparation method thereof and an application in repairing heavy metal polluted soil. The composite modified biochar stabilizer is calculated in parts by weight, and the raw material composition includes: 1-4 parts of modified biochar, 0.5-1.5 parts of lime, and 0.5-1 part of potassium dihydrogen phosphate. In the preparation method, the modified biochar, lime and potassium dihydrogen phosphate are stirred and mixed uniformly to obtain the composite modified biochar stabilizer. The invention is economically feasible, easy to construct and short in repair period, and provides ideas for resource utilization of agricultural waste.

Description

technical field [0001] The invention relates to the field of environmental technology, in particular to a composite modified biomass charcoal stabilizer and its preparation method and application. Background technique [0002] A survey announcement shows that the total excess rate of soil pollution in my country is 16%, of which inorganic pollutants account for 83% of the total excess rate. The annual food loss due to heavy metal pollution is about 1.2×10 7 Ton. The situation of soil pollution in my country is severe, especially the problem of soil heavy metal pollution is very prominent. The source of heavy metals in soil is mainly human production activities, including: heavy metals enter the soil with atmospheric deposition; heavy metals enter the soil with sewage irrigation; heavy metals produced by factory production and mining activities enter the soil; heavy metals produced by agricultural activities enter the soil. [0003] At present, the main remediation technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 陈昆柏赵怡阳王燕李芙荣陶祥运张易旻林志
Owner 浙江博世华环保科技有限公司
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