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Macadamia nut shell/Chinese torreya fruit shell bio-char and preparation method thereof

A technology of macadamia nuts and torreya nuts, applied in the field of biochar with high adsorption performance for heavy metal ions and its preparation, can solve problems such as lack, achieve the effect of improving purification effect and promoting resource utilization

Inactive Publication Date: 2014-08-20
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 / torreya husk biochar, prepared according to the following steps:

[0021] 1. Biomass raw material pretreatment

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

[0023] 2. Preparation method

[0024] (1) Mix the crushed macadamia husks and torreya husks at a mass ratio of 1:1, add 1.5mol / L hydrochloric acid solution, stir evenly, seal and let stand for 24 hours, then add 5ml of 0.1mol / L cesium nitrate solution Mix well, seal and let stand for 12 hours, 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 120min, and the pyrolysis heating rate 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 shake...

Embodiment 2

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

[0040] 1. Biomass raw material pretreatment: crush the collected macadamia husks and torreya husks and sieve through an 80-mesh sieve.

[0041] 2. Preparation method

[0042] (1) Mix the crushed macadamia husks and torreya husks at a mass ratio of 2:1, add 1.5mol / L hydrochloric acid solution, 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.

[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 120min, and the pyrolysis heating rate 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 at a speed of 400r / min for ...

Embodiment 3

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

[0058] 1. Biomass raw material pretreatment: crush the collected macadamia husks and torreya husks and sieve through an 80-mesh sieve.

[0059] 2. Preparation method

[0060] (1) Mix the crushed macadamia husks and torreya husks at a mass ratio of 5:1, add 1.5mol / L hydrochloric acid solution, stir evenly, seal and let stand for 24 hours, then add 5ml of 0.1mol / L cesium nitrate solution Mix well, seal and let stand for 12 hours, 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 120min, and the pyrolysis heating rate 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 ...

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Abstract

The invention provides a macadamia nut shell / Chinese torreya fruit shell bio-char which is high-adsorptivity bio-char prepared from macadamia nut shells and Chinese torreya fruit shells through anaerobic pyrolysis. A preparation method for the bio-char comprises the following steps: crushing the macadamia nut shells and the Chinese torreya fruit shells, carrying out sieving, uniformly mixing the sieved macadamia nut shells and the sieved Chinese torreya fruit shells according to a certain mass ratio, adding a dilute hydrochloric acid solution for soaking for 24 h, then adding a cesium nitrate solution, carrying out uniform mixing, sealing and standing for 12 h and then carrying out natural air drying; and subjecting naturally air-dried biomass to high temperature anaerobic pyrolysis so as to prepare the bio-char. With the bio-char prepared in the invention, the contents of lead, chromium, zinc and copper in water can be effectively reduced, and maximum removal rates of lead, chromium, zinc and copper in water can reach 81.8%, 82.9%, 86.3% and 85.1%, 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): B01J20/20B01J20/30
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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