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A kind of walnut branch biochar-based fertilizer soil repair agent and its preparation method and application

A biochar-based fertilizer and soil repair agent technology, applied in the field of fertilizers, can solve the problems of little effect, long treatment time, poor treatment effect, etc., and achieve the effect of improving adsorption capacity, large specific surface area, and firm combination

Active Publication Date: 2021-12-21
YANGLING VOCATIONAL & TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The biochar-based fertilizer soil remediation agent in the prior art only achieves soil remediation by adjusting the soil structure by mixing the biochar-based fertilizer with water-retaining agents, inorganic salts or organic nutrients, or by decomposing the biochar-based fertilizer and biomass. , for the treatment of heavy metal-contaminated soil, this kind of soil remediation agent obviously has little effect. For the treatment of heavy metal-contaminated soil, the treatment time is often long and the treatment effect is poor. Therefore, a new type of biochar-based fertilizer soil remediation agent is needed. To control soil heavy metal pollution

Method used

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  • A kind of walnut branch biochar-based fertilizer soil repair agent and its preparation method and application
  • A kind of walnut branch biochar-based fertilizer soil repair agent and its preparation method and application
  • A kind of walnut branch biochar-based fertilizer soil repair agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of walnut branch biochar-based fertilizer soil repair agent, comprising the steps of:

[0036] (1) Preparation of biochar:

[0037] a. Wash the walnut branches with water to remove surface dirt, air-dry them, then dry them at 70°C for 12 hours, and then pass them through a 60-mesh sieve to obtain pretreated biochar;

[0038] b. Under a nitrogen atmosphere, heat the pretreated biochar in a tubular furnace from room temperature to 600 °C at a heating rate of 15 °C / min, keep it warm for 3 hours, cool down to room temperature, ball mill and pass through a 200-mesh sieve to obtain biological carbon;

[0039] (2) Modification of biochar:

[0040] a. Weighing nano-Fe 3 o 4 , the nano-Fe 3 o 4 Add chloroform and sonicate until a transparent and clear solution A is obtained;

[0041] b. Weigh the biochar prepared in step (1), add the biochar to chloroform and sonicate until a stable solution B is formed;

[0042] c. Add solution A to solution B, mix ...

Embodiment 2

[0048] A preparation method of walnut branch biochar-based fertilizer soil repair agent, comprising the steps of:

[0049] (1) Preparation of biochar:

[0050] a. Wash the walnut branches with water to remove surface dirt, air-dry them, then dry them at 80°C for 10 hours, and then pass them through a 80-mesh sieve to obtain pretreated biochar;

[0051] b. Under a nitrogen atmosphere, the pretreated biochar was raised from room temperature to 650 °C at a heating rate of 15 °C / min in a tube furnace, kept for 2.5 hours, cooled to room temperature, ball milled and passed through a 160-mesh sieve to obtain bio-charcoal;

[0052] (2) Modification of biochar:

[0053] a. Weighing nano-Fe 3 o 4 , the nano-Fe 3 o 4 Add chloroform and sonicate until a transparent and clear solution A is obtained;

[0054] b. Weigh the biochar prepared in step (1), add the biochar to chloroform and sonicate until a stable solution B is formed;

[0055] c. Add solution A to solution B, mix evenly,...

Embodiment 3

[0061] A preparation method of walnut branch biochar-based fertilizer soil repair agent, comprising the steps of:

[0062] (1) Preparation of biochar:

[0063] a. Wash the walnut branches with water to remove surface dirt, air-dry them, then dry them at 100°C for 8 hours, and then pass them through a 100-mesh sieve to obtain pretreated biochar;

[0064] b. Under a nitrogen atmosphere, heat the pretreated biochar in a tube furnace from room temperature to 700 °C at a heating rate of 15 °C / min, keep it warm for 2 hours, cool down to room temperature, ball mill and pass through a 120-mesh sieve to obtain biological carbon;

[0065] (2) Modification of biochar:

[0066] a. Weighing nano-Fe 3 o 4 , the nano-Fe 3 o 4 Add chloroform and sonicate until a transparent and clear solution A is obtained;

[0067] b. Weigh the biochar prepared in step (1), add the biochar to chloroform and sonicate until a stable solution B is formed;

[0068] c. Add solution A to solution B, mix ev...

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Abstract

The invention relates to the technical field of fertilizers, in particular to a walnut branch biochar-based fertilizer soil repair agent and its preparation method and application. The preparation method of a walnut branch biochar-based fertilizer soil repair agent is as follows: conditional carbonization to obtain walnut branch biochar, and then the dispersed biochar and dispersed nano-Fe 3 o 4 Mixed crystallization, making Fe 3 o 4 @biochar's modified biochar, and finally attached to the modified biochar are microbial colonies for the treatment of soil heavy metal pollution. At this time, through biochar and Fe 3 o 4 Adsorb heavy metal ions in the soil, and transform and degrade pollutants through the metabolism of microorganisms. Not only the waste utilization of walnut branches is realized, but also biochar, Fe 3 o 4 It forms a system for degrading pollutants with microorganisms, and controls soil heavy metal pollution through the joint action of the three.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a walnut branch biochar-based fertilizer soil repair agent and its preparation method and application. Background technique [0002] The soil is originally a natural shelter and purification treatment site for various wastes, and the pollutants are received through the soil. When the pollutants contained in the soil exceed the self-purification capacity of the soil, it will cause serious problems in hygiene and epidemiology. Harmful effects have been produced indicating contamination of the soil. In recent years, with the continuous acceleration of the industrialization process, the mining of mineral resources and their smelting discharge, sewage irrigation and sludge application to the soil, and the random discarding of solid waste have caused soil heavy metal pollution to increase year by year. Therefore, soil heavy metal pollution has been eliminated. has received widespr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40B09C1/00B09C1/08B09C1/10C05G3/80C09K101/00
CPCC09K17/40B09C1/00B09C1/08B09C1/10C05D9/00C05G3/80C09K2101/00B09C2101/00C05D9/02C05F11/08
Inventor 杜璨杜璇范学科郑爱泉周济铭王锋冯帆
Owner YANGLING VOCATIONAL & TECHN COLLEGE
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