Modified biochar-based soil conditioner for repairing Cd pollution, and preparation method and application thereof

A soil conditioner and biochar technology, which is used in the restoration of polluted soil, soil conditioning materials, applications, etc., can solve the problems of pollution and lack of repair materials, and achieve the effects of promoting crop growth, increasing pH value, and having a wide range of sources.

Active Publication Date: 2020-06-19
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lack of widely sourced, environmentally friendly and efficient remediation materials is one of the important reasons restricting the remediation of heavy metal pollution in soil.

Method used

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  • Modified biochar-based soil conditioner for repairing Cd pollution, and preparation method and application thereof
  • Modified biochar-based soil conditioner for repairing Cd pollution, and preparation method and application thereof
  • Modified biochar-based soil conditioner for repairing Cd pollution, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: A kind of preparation method of modified biochar-based soil conditioner

[0034] Soda industrial waste residue (also known as alkali residue) is rinsed with pure water, filtered with filter paper, dried and crushed to a particle size of less than 5mm to form a coarse alkali residue product; coconut shells are dried and crushed to a particle size of less than 5mm to form coconut shell granular products. Weigh 100g of the crude alkali slag product and 1500g of the coconut shell granular material respectively, mix them well, put them into an atmosphere box furnace, and after evacuating, nitrogen gas is introduced as a protective gas, and the temperature is raised within 60 minutes at a rate of 10°C per minute to 450°C, heat-preserve for 5 hours, and then cool to room temperature to obtain the crude product of the modified coconut shell biochar-based soil conditioner. The crude product of the obtained modified coconut shell biochar-based soil conditioner is gr...

Embodiment 2

[0035] Embodiment 2: A kind of preparation method of modified biochar-based soil conditioner

[0036] Rinse the soda industrial waste slag with pure water, filter it with filter paper, dry and pulverize it until the particle size is less than 5mm to form a coarse alkali slag product; dry and pulverize the rice husk until the particle size is less than 5mm. Weigh 100g of the crude product of alkali slag and 1500g of rice husk granular material and mix them well, put them into the atmosphere box furnace, and then inject nitrogen gas as the protective gas after vacuuming, and raise the temperature to 450°C within 60 minutes at a speed of 10°C per minute. Insulate and react for 5 hours, and then cool to room temperature to obtain the crude product of the modified rice husk biochar-based soil conditioner. The crude product of the modified rice husk biochar-based soil conditioner is ground and passed through an 80-mesh sieve to obtain the modified rice husk biochar-based soil condit...

Embodiment 3

[0037] Embodiment 3: A kind of preparation method of modified biochar-based soil conditioner

[0038]Rinse the soda industrial waste residue with pure water, filter it with filter paper, dry and pulverize it until the particle size is less than 5mm to form a coarse alkali slag product; dry and pulverize the biogas by-product until the particle size is less than 5mm. Weigh 100g of the crude product of alkali slag and 1500g of the by-product granules of biogas, and mix them well, put them into the atmosphere box furnace, and after vacuuming, nitrogen is introduced as the protective gas, and the temperature is raised to 450°C within 60 minutes at a speed of 10°C per minute. , heat preservation reaction for 5 hours, and then cooled to room temperature to obtain the crude product of biochar-based soil conditioner as a by-product of modified biogas. The crude product of the modified biogas by-product biochar-based soil conditioner is ground and passed through an 80-mesh sieve to pre...

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Abstract

The invention discloses a modified biochar-based soil conditioner for repairing Cd pollution and a preparation method and application thereof, belonging to the field of soil treatment. The modified biochar-based soil conditioner provided by the invention is prepared by heating agricultural / industrial waste and an alkaline additive. The soil conditioner obtained after a high-temperature reaction can effectively reduce the content of available Cd in acid soil contaminated by heavy metal, increase the pH value of the soil, promote vegetable growth and reduce the accumulation amount of heavy metalCd in vegetables. Meanwhile, the modified charcoal-based soil conditioner provided by the invention has the advantages of low cost, convenience and easiness in preparation and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of soil heavy metal treatment, and in particular relates to a modified biochar-based soil conditioner for promoting vegetable growth and reducing vegetable Cd accumulation, a preparation method and application thereof. Background technique [0002] With the acceleration of urbanization and industrialization in my country, the impact of human activities on the quality of the soil environment is increasing. The discharge of "three wastes" from industries such as electroplating, steel, and printing and dyeing is increasing. Pesticides and fertilizers containing heavy metals in mining and agricultural production are not Reasonable application, etc., have made the problem of soil heavy metal pollution increasingly prominent. Cadmium (Cd) is currently the most common heavy metal element in farmland soil pollution. It is difficult to migrate, difficult to degrade, and easy to be enriched by plants. The "National Soil Polluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40B09C1/00C05G3/80C09K109/00C09K101/00
CPCB09C1/00C05D1/00C09K17/40C09K2101/00C09K2109/00
Inventor 黄连喜魏岚刘忠珍黄玉芬黄庆李翔
Owner INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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