Check patentability & draft patents in minutes with Patsnap Eureka AI!

Manganese modified charcoal for reducing arsenic absorption of rice and application method thereof

A biochar, rice technology, applied in chemical instruments and methods, applications, fertilization devices, etc., can solve the problems of not providing a preparation method, and cannot effectively reduce the arsenic content of rice, so as to enhance the adsorption and fixation capacity, reduce the arsenic content of rice, The effect of high content of oxygen-containing functional groups

Inactive Publication Date: 2021-04-09
广东省农业科学院农业质量标准与监测技术研究所
View PDF12 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the biochar-manganese composite material disclosed in the prior art does not provide a simple and easy preparation method, nor can it effectively reduce the arsenic content in rice and its application technology to meet the rice arsenic qualification.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Manganese modified charcoal for reducing arsenic absorption of rice and application method thereof
  • Manganese modified charcoal for reducing arsenic absorption of rice and application method thereof
  • Manganese modified charcoal for reducing arsenic absorption of rice and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation method of the manganese-modified biochar that reduces rice arsenic absorption that the present embodiment provides, comprises the following steps:

[0040] (1) After crushing the chaff, place it in a vacuum box-type atmosphere furnace, fill it with nitrogen as a protective gas after vacuuming, raise the temperature to 600°C at a rate of 10°C per minute, and then carbonize it at a constant temperature for 2 hours, take it out after cooling, and crush it. Sieve (0.85mm aperture) to make biochar;

[0041] (2) Wash the biochar obtained in step (1) with deionized water to neutrality by suction filtration, and dry at 60° C. to obtain neutral biochar;

[0042] (3) Take 5 parts of neutral biochar prepared in step (2) and 1 part of potassium permanganate, put them in a crucible, add 40 parts of deionized water, mix them with ultrasonic waves for 2 hours, evaporate to dryness in a water bath at 95°C, and put Pyrolyze in a vacuum box-type atmosphere furnace at 600...

Embodiment 2

[0044] The present embodiment reduces the preparation method of the manganese-modified biochar that rice arsenic absorbs, comprises the following steps:

[0045] (1) After crushing the chaff, place it in a vacuum box-type atmosphere furnace, fill it with nitrogen as a protective gas after vacuuming, raise the temperature to 500°C at a rate of 10°C per minute, and then carbonize it at a constant temperature for 3 hours, take it out after cooling, and crush it. Sieve (0.85mm aperture) to make biochar;

[0046] (2) Wash the biochar obtained in step (1) with deionized water to neutrality by suction filtration, and dry at 80° C. to obtain neutral biochar;

[0047](3) Take 10 parts of neutral biochar prepared in step (2) and 1 part of potassium permanganate, put them in a crucible, add 120 parts of deionized water, mix with 40KHz ultrasonic frequency for 2.5h, and evaporate to dryness in a water bath at 80°C After that, put it into a vacuum box-type atmosphere furnace at 500°C unde...

Embodiment 3

[0049] The present embodiment reduces the preparation method of the manganese-modified biochar that rice arsenic absorbs, comprises the following steps:

[0050] (1) After crushing the chaff, put it in a vacuum box-type atmosphere furnace, fill it with nitrogen as a protective gas after vacuuming, carbonize at a constant temperature at 600°C for 3 hours, take it out after cooling, crush and sieve (0.85mm pore size), and obtain biological carbon;

[0051] (2) Wash the biochar obtained in step (1) with clear water to neutrality by suction filtration, and dry naturally to obtain neutral biochar;

[0052] (3) Take 5 parts of neutral biochar prepared in step (2) and 2 parts of potassium permanganate, put them in a crucible, add 40 parts of deionized water, mix with 120KHz ultrasonic frequency for 1.5h, and evaporate to dryness in a water bath at 90°C After that, put it into a vacuum box-type atmosphere furnace at 600°C under the protection of nitrogen for 0.4h of pyrolysis, and co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of manganese modified biochar for reducing arsenic absorption of rice, which comprises the steps of (1) selecting biomass, pyrolyzing under the protection of nitrogen, cooling, taking out, crushing and sieving to obtain biochar powder; (2) washing the biochar powder in the step (1) to be neutral, and drying to obtain neutral biochar ; and (3) carrying out ultrasonic treatment on the neutral biochar obtained in the step (2), manganese and water, carrying out water bath evaporation to dryness, carrying out pyrolysis again under the protection of nitrogen, cooling, and taking out to obtain the manganese modified biochar. The invention also provides the manganese modified biochar prepared by the method and an application method of the manganese modified biochar. The preparation method has the characteristics of mild conditions, simple operation process, easily available raw materials, large-scale production and environmental protection. The manganese modified biochar has high soil arsenic adsorption capacity and can reduce arsenic absorption of rice and reduce arsenic in the rice. The application method can be used for arsenic-polluted farmland remediation, and the rice quality safety level is improved.

Description

technical field [0001] The invention belongs to the technical field of farmland soil conditioners, and in particular relates to a manganese-modified biochar for reducing rice arsenic absorption and an application method thereof. Background technique [0002] Excessive arsenic has become one of the key issues in rice cultivation. The effective arsenic content in paddy soil is higher under flooded anaerobic conditions. Arsenic pollution to a certain level can not only significantly inhibit the growth and development of rice, but also seriously affect the quality of rice in my country. Safety. [0003] Biochar prepared from biomass has the characteristics of no pollution, high adsorption capacity, and wide range of sources, and has become one of the most promising inputs in the agricultural field. As a soil amendment, biochar has shown great potential in remediation of heavy metal pollution, promotion of plant growth, and increase of crop yield. However, the effect of biochar ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J20/20B01J20/30B01J20/32B09C1/00C09K17/02C09K101/00
CPCB01J20/20B01J20/3021B01J20/3078B01J20/3071B01J20/3236B09C1/00C09K17/02B01J2220/4881C09K2101/00
Inventor 黄永东杜应琼陈永坚陈楚国杜瑞英文典吴志超彭立钧李梅霞
Owner 广东省农业科学院农业质量标准与监测技术研究所
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com