Macadamia nut shell/pecan nut shell biocarbon and preparation method thereof

A technology of pecan shells and macadamia nuts, which is applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve problems such as shortages, achieve the goals of ensuring adsorption performance, promoting resource utilization, and improving purification effects Effect

Inactive Publication Date: 2014-08-27
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing biochar preparation, biochar is mostly prepared from a single raw material, and there are few studies on the preparation of biochar from mixed materials, especially the lack of research on the purposeful combination of biomass to prepare biochar with high adsorption performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] One, a kind of macadamia husk / pecan husk biochar, is prepared according to the following steps:

[0021] 1. Biomass raw material pretreatment

[0022] The collected macadamia husks and pecan husks are pulverized and sieved with an 80-mesh sieve.

[0023] 2. Preparation method

[0024] (1) Mix the crushed macadamia husks and pecan husks in a mass ratio of 1:1, add 1.5mol / L hydrochloric acid solution and stir evenly, seal and let stand for 24 hours, then add 0.1mol / L cesium nitrate solution Mix 5ml, seal and let stand for 12h, and air dry naturally.

[0025] (2) Put the above-mentioned treated biomass raw material in a porcelain crucible for compaction, cover it, and pyrolyze it at 600°C for 180min, and the heating rate of pyrolysis is 10°C / min. After the pyrolysis reaction is over, take out the crucible after cooling to room temperature.

[0026] (3) Mix the biochar prepared above with H at a concentration of 1.0mol / L 2 o 2 Mix evenly, shake in a shaker at a spe...

Embodiment 2

[0039] One, a kind of macadamia husk / pecan husk biochar, is prepared according to the following steps:

[0040] 1. Pretreatment of biomass raw materials: crush the collected macadamia husks and pecan husks and sieve through an 80-mesh sieve.

[0041] 2. Preparation method

[0042] (1) Mix the crushed macadamia husks and pecan husks at a mass ratio of 3:1, add 1.5mol / L hydrochloric acid solution and stir evenly, seal and let stand for 24 hours, then add 0.1mol / L cesium nitrate Mix 5ml of the solution, seal it and let it stand for 12h, and let it air dry naturally.

[0043] (2) Put the above-mentioned treated biomass raw material in a porcelain crucible for compaction, cover it, and pyrolyze it at 600°C for 180min, and the heating rate of pyrolysis is 10°C / min. After the pyrolysis reaction is over, take out the crucible after cooling to room temperature.

[0044] (3) Mix the biochar prepared above with H at a concentration of 1.0mol / L 2 o 2 Mix evenly, shake in a shaker ...

Embodiment 3

[0057] One, a kind of macadamia husk / pecan husk biochar, is prepared according to the following steps:

[0058] 1. Pretreatment of biomass raw materials: crush the collected macadamia husks and pecan husks and sieve through an 80-mesh sieve.

[0059] 2. Preparation method

[0060] (1) Mix the crushed macadamia husks and pecan husks at a mass ratio of 5:1, add 1.5mol / L hydrochloric acid solution and stir evenly, seal and let stand for 24 hours, then add 0.1mol / L cesium nitrate solution Mix 5ml, seal and let stand for 12h, and air dry naturally.

[0061] (2) Put the above-mentioned treated biomass raw material in a porcelain crucible for compaction, cover it, and pyrolyze it at 600°C for 180min, and the heating rate of pyrolysis is 10°C / min. After the pyrolysis reaction is over, take out the crucible after cooling to room temperature.

[0062] (3) Mix the biochar prepared above with H at a concentration of 1.0mol / L 2 o 2 Mix evenly, shake in a shaker at a speed of 400r / m...

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Abstract

A macadamia nut shell/pecan nut shell biocarbon is a high-adsorption-performance biocarbon prepared through anaerobic pyrolysis of raw materials comprising macadamia nut shells and pecan nut shells; the macadamia nut shells and the pecan nut shells are crushed and sieved, and are uniformly mixed according to a certain mass ratio, a dilute hydrochloric acid solution is added to immerse the obtained mixture, the mixture is immersed for 24h, a cesium nitrate solution is added, the obtained mixture is uniformly stirred, is sealed, and stands for 12h, and then the mixture is naturally air-dried. The naturally-dried biomass undergoes high-temperature anaerobic pyrolysis to prepare the biocarbon. The biocarbon can effectively reduce the content of Pb, Cr, Zn and Cu in water, and makes the highest removal rates of Pb, Cr, Zn and Cu in water reach 86.8%, 89.3%, 87.1% and 83.9% respectively.

Description

technical field [0001] The invention relates to the field of resource utilization of agricultural organic waste and the field of pollution environment treatment, in particular to a biochar with high adsorption performance for heavy metal ions and a preparation method thereof. Background technique [0002] Biochar is a solid substance left after biomass material is pyrolyzed under anoxic or oxygen-limited conditions to remove oil and gas from the biomass. Biochar has excellent adsorption properties and can directly adsorb pollutants in wastewater; after soil application, it can also improve soil physical and chemical properties, reduce nutrient loss, promote crop growth, adsorb and fix soil pollutants, and increase soil carbon pools The role of emission reduction. Therefore, biochar has become one of the research hotspots in the field of environmental and agricultural sciences in recent years. In the existing biochar preparation, biochar is mostly prepared from a single raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F1/62
Inventor 夏红霞其他发明人请求不公开姓名
Owner CHONGQING UNIV OF ARTS & SCI
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