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Soil remediation agent, preparation method and application thereof

A soil remediation agent and related technology, applied in the field of soil remediation agent and its preparation, can solve problems such as health and life safety hazards, and achieve the effects of reducing absorption, reducing mobility, and reducing heavy metal content

Pending Publication Date: 2019-07-26
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, Cd is toxic and highly mobile. Cadmium in soil is easily absorbed by plants and enters organisms through the food chain, which poses a serious hazard to human health and life safety.

Method used

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  • Soil remediation agent, preparation method and application thereof
  • Soil remediation agent, preparation method and application thereof
  • Soil remediation agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Naturally air-dry the rapeseed waste, and dry at 80°C for 3.5 hours to obtain the dried rapeseed waste material; crush and sieve the dried rapeseed waste material to make the raw material particles uniform, and put it evenly into the raw material In the material pyrolysis reaction device, heat up to 500°C, the heating rate is 15°C / min, keep warm for 4h, cool to room temperature for 3h, and take out to obtain rapeseed waste biochar;

[0036] (2) Mix 1 part of rapeseed biochar with 1 part of humic acid, mix the two evenly, and pulverize to obtain a biochar soil remediation agent.

Embodiment 2

[0038] (1) Air-dry the rapeseed waste naturally, and dry at 75°C for 3 hours to obtain the dried rapeseed waste material; crush and sieve the dried rapeseed waste material to make the raw material particles uniform, and put it into the biomass In the pyrolysis reaction device, heat up to 450°C, heat up at a rate of 20°C / min, keep warm for 3 hours, cool to room temperature for 3 hours, and take out to obtain rapeseed waste biochar;

[0039] (2) Mix 2 parts of rapeseed biochar with 1 part of humic acid, mix the two evenly, and pulverize to obtain a biochar soil remediation agent.

Embodiment 3

[0041] (1) Naturally air-dry the rapeseed waste, and dry at 85°C for 4 hours to obtain the dried rapeseed waste material; crush and sieve the dried rapeseed waste material to make the raw material particles uniform, and put it into the biomass evenly In the pyrolysis reaction device, heat to 550°C, the heating rate is 20°C / min, keep warm for 4 hours, cool to room temperature for 4 hours, and take out to obtain rapeseed waste biochar;

[0042] (2) Mix 1 part of rapeseed biochar with 2 parts of humic acid, mix the two evenly, and pulverize to obtain the soil remediation agent.

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Abstract

The invention discloses a soil remediation agent, which is prepared by mixing biochar and humic acid, wherein the biochar is prepared from crop wastes, and the mass ratio of the biochar to the humic acid is 1-2: 1-3. The invention further discloses a soil remediation agent preparation method, which includes, firstly, drying and heating the crop wastes to prepare the biochar; then mixing the biochar and the humic acid; and crushing to obtain the soil remediation agent. The preparation process is simple, and wastes are changed into valuables. The invention further discloses a soil remediation agent application, which can effectively reduce the content of heavy metal Cd in the soil, improve the soil moisture content and promote the growth of plants.

Description

technical field [0001] The invention belongs to the technical field of remediation of soil heavy metal pollution, and in particular relates to a soil remediation agent and its preparation method and application. Background technique [0002] With the acceleration of urbanization, industrialization and other activities, soil heavy metal pollution has become one of the key issues restricting the sustainable development of agriculture. The disorderly discharge of industrial "three wastes" and the extensive use of Cd-containing fertilizers lead to heavy metal pollution in farmland soil has attracted widespread attention. . The survey shows that the national farmland Cd point exceeds the standard rate of 7%, and the area of ​​polluted cultivated land reaches 14,000 mu hm 2 , ranking first in inorganic pollutants, and the agricultural products that exceed the standard due to cadmium pollution reach 1.46 million tons every year. Moreover, Cd is toxic and highly mobile. Cadmium in...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01N61/00A01N59/00A01P21/00B09C1/08C09K109/00C09K101/00
CPCA01N59/00A01N61/00B09C1/08C09K17/40C09K2101/00C09K2109/00Y02A40/22Y02P60/21
Inventor 郭军康赵瑾魏婷张祎任心豪贾红磊花莉刘蓓
Owner SHAANXI UNIV OF SCI & TECH
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