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Biomass charcoal soil heavy metal repair agent and preparation method and application thereof

A technology of biomass charcoal and heavy metals, which is applied to fertilizers, applications and land preparation methods made of biological waste, can solve the problems of less preparation and application of biomass charcoal, improve soil water and fertilizer retention capacity, and improve fertilizer utilization rate. , the effect of improving and fertilizing soil

Active Publication Date: 2016-06-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in my country, there are many researches on the preparation and application of biochar using crop straw as raw material, but less research on the preparation and application of biochar.

Method used

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  • Biomass charcoal soil heavy metal repair agent and preparation method and application thereof
  • Biomass charcoal soil heavy metal repair agent and preparation method and application thereof
  • Biomass charcoal soil heavy metal repair agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Dry chicken manure or camellia oleifera shell at 65°C for 24 hours to obtain dried chicken manure or camellia oleifera shell; the moisture content of dried chicken manure is 4.05%; the moisture content of dried camellia oleifera shell is 7.54%;

[0056] (2) Pulverize the larger raw materials of chicken manure or camellia oleifera shell after step (1), so that the raw material particles participating in the pyrolysis reaction are uniform, and the particles after crushing are not more than 4 mm long; then put them evenly Put it into the biomass pyrolysis reaction device, heat to 500 °C, the heating rate is 17 °C / min; keep warm for 1 hour; then take it out when it is cooled to room temperature, and obtain the biochar soil heavy metal restoration agent, that is, the chicken manure charcoal soil heavy metal restoration agent Or camellia shell charcoal soil heavy metal remediation agent;

[0057] (3) The biochar soil heavy metal remediation agent prepared in step (2) was ...

Embodiment 2

[0077] (1) Dry chicken manure or camellia oleifera shell at 40°C for 28 hours to obtain dried chicken manure or camellia oleifera shell; the moisture content of dried chicken manure is 6.25%; the moisture content of dried camellia oleifera shell is 8.05%;

[0078] (2) Pulverize the larger raw materials of chicken manure or camellia oleifera shell after step (1), so that the raw material particles participating in the pyrolysis reaction are uniform, and the particles after crushing are not more than 4 mm long; then put them evenly Put it into the biomass pyrolysis reaction device, heat to 450°C, the heating rate is 16°C / min; keep warm for 1 hour; then take it out when it is cooled to room temperature, and obtain the biochar soil heavy metal remediation agent, that is, chicken manure charcoal soil heavy metal remediation agent Or camellia shell charcoal soil heavy metal remediation agent;

[0079] (3) The biochar soil heavy metal remediation agent prepared in step (2) was subjec...

Embodiment 3

[0087] (1) Dry chicken manure or camellia oleifera shell at 60°C for 20 hours to obtain dried chicken manure or camellia oleifera shell; the moisture content of dried chicken manure is 4.80%; the moisture content of dried camellia oleifera shell is 7.85%;

[0088] (2) Pulverize the larger raw materials of chicken manure or camellia oleifera shell after step (1), so that the raw material particles participating in the pyrolysis reaction are uniform, and the particles after crushing are not more than 4 mm long; then put them evenly Put it into the biomass pyrolysis reaction device, heat it to 550 ° C, and the heating rate is 18 ° C / min; keep it warm for 1 hour; then take it out when it is cooled to room temperature, and obtain the biochar soil heavy metal restoration agent, that is, the chicken manure charcoal soil heavy metal restoration agent Or camellia shell charcoal soil heavy metal remediation agent;

[0089] (3) The biochar soil heavy metal remediation agent prepared in...

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Abstract

The invention belongs to the technical field of heavy-metal-polluted soil improvement agents, and particularly relates to a biomass charcoal soil heavy metal repair agent and a preparation method and application thereof. The method includes the following steps of firstly, drying material chicken manure or oil tea hulls respectively to obtain dried chicken manure or oil tea hulls; secondly, smashing the dried chicken manure or oil tea hulls in the first step, heating the dried chicken manure or oil tea hulls to 450-550 DEG C, conducting heat preservation for 1h+ / -5min, and conducting cooling to obtain the biomass charcoal soil heavy metal repair agent. The repair agent can restrain the bio-availability of heavy metal in soil and decrease the absorptive amount of crops for heavy metal in soil, and is abundant in nutrient substance, coordinated and lasting in nutrient element release, high in fertilizer nutrient utilization efficiency, and capable of effectively improving and fertilizing soil, increasing the fertilizer utilization rate, increasing the soil organic matter content and improving the water and nutrient retention capacity of soil.

Description

technical field [0001] The invention belongs to the technical field of heavy metal-polluted soil modifiers, and in particular relates to a biochar soil heavy metal repairing agent and its preparation method and application. Background technique [0002] In recent years, biomass carbonization is one of the research hotspots of biomass utilization and conversion technology. Biomass carbonization refers to the technology of biomass (such as agricultural and forestry waste, livestock and poultry manure, etc.) under the condition of anoxic and certain temperature, with biochar as the target product. Biochar is mainly composed of aromatic hydrocarbons and elemental carbon or carbon with graphite structure, containing more than 60% carbon, and also includes H, O, N, S and a small amount of trace elements. Biochar has well-developed pore structure, large specific surface area, many negative charges, high aromatization, strong adsorption characteristics and high stability. [0003]...

Claims

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Application Information

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IPC IPC(8): C05G3/04A01B79/02C05G3/80
CPCA01B79/02C05F3/00C05G3/80C05F5/002
Inventor 简秀梅蒋恩臣王明峰许细薇李治宇陈晓堃吴宇健徐强宋艳培
Owner SOUTH CHINA AGRI UNIV