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Method for extracting black carbon absorption material using plant ash as raw material

An adsorption material, a technology of plant ash, which is applied in the field of extracting and preparing black carbon adsorption materials with plant ash as raw materials, achieving the effect of high specific surface area, high carbon content and low cost

Inactive Publication Date: 2009-01-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no report on the preparation of black carbon adsorption materials by extracting plant ash as raw materials

Method used

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  • Method for extracting black carbon absorption material using plant ash as raw material
  • Method for extracting black carbon absorption material using plant ash as raw material
  • Method for extracting black carbon absorption material using plant ash as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Commercial concentrated hydrochloric acid is diluted with deionized water to obtain solution A (hydrofluoric acid concentration is 2mol / L); commercial hydrofluoric acid is diluted with deionized water to obtain solution B (hydrofluoric acid concentration is 2mol / L); solution A Mix with solution B in a ratio of 1:1 to obtain solution C (the concentration of hydrochloric acid and hydrofluoric acid in the mixed solution is 1mol / L);

[0025] Add 2Kg rice straw plant ash in 10L plastic barrel (infrared spectrogram sees figure 2 ), add solution A under slow mechanical stirring, adjust the solid-liquid volume ratio to 1:4, and mechanically stir for 4 hours at room temperature; Repeat this step for a batch of A solution for 4 times, and finally wash with deionized water 5 times to remove most of the metal ions such as iron, aluminum, calcium, etc. in plant ash;

[0026] Put the solid sample obtained in the previous step into another 10L plastic bucket, add solution C, adjust ...

Embodiment 2

[0030] Industrial waste hydrochloric acid is diluted with deionized water to obtain solution A (hydrofluoric acid concentration is 1mol / L); commercial hydrofluoric acid is diluted with deionized water to obtain solution B (hydrofluoric acid concentration is 1mol / L); solution A Mix with solution B in a ratio of 1:1 to obtain solution C (the concentration of hydrochloric acid and hydrofluoric acid in the mixed solution is 0.5mol / L);

[0031] Add 1.5Kg wheat straw ash into a 10L plastic bucket, add solution A under slow mechanical stirring, adjust the solid-liquid volume ratio to 1:3, and mechanically stir for 6 hours at room temperature; Subsequent steps are dealt with together. The resulting solid is repeated with the next batch of A solution and this step is processed 4 times, and finally washed 4 times with deionized water to remove most of the metal ions such as iron, aluminum, calcium, etc. in the plant ash;

[0032] Put the solid sample obtained in the previous step into ...

Embodiment 3

[0036] Dilute industrial waste hydrochloric acid with deionized water to obtain solution A (hydrofluoric acid concentration is 0.5mol / L); dilute industrial waste hydrofluoric acid with deionized water to obtain solution B (hydrofluoric acid concentration is 0.5mol / L); Mix solution A and solution B in a ratio of 1:1 to obtain solution C (the concentration of hydrochloric acid and hydrofluoric acid in the mixed solution is 0.25mol / L);

[0037] Add 2Kg corn stalk plant ash into a 10L plastic bucket, add solution A under slow mechanical stirring, adjust the solid-liquid volume ratio to 1:5, and mechanically stir for 5 hours at room temperature; after standing still, the solid-liquid separation is separated by suction filtration, and the obtained liquid is collected for subsequent follow-up steps together. The resulting solid is repeated with the next batch of A solution and this step is reprocessed 4 times, and finally washed 5 times with deionized water to remove most of the meta...

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Abstract

The invention provides a method which is used for extracting and preparing a black carbon adsorption material by taking plant ash as the raw material. The method comprises the following steps: firstly, a hydrochloric acid solution, the concentration of which is 0.5-2.0 mol / L, is used for processing the plant ash for 3-8 times, each time lasts for 2-6 hours, deionized water is used for fully washing after solid masses are obtained, and then the next step is carried out; secondly, the solid masses obtained in the step one are processed by a mixed acid solution containing 0.25-1.0 mol / L of hydrochloric acid and 0.25-1.0 mol / L of hydrofluoric acid for 3-8 times, each time lasts for 2-6 hours, and the deionized water is used for washing the obtained solid masses until the pH of a flushing fluid is neutral; thirdly, the solid masses obtained in the step two are dried, ground and screened, so as to obtain the more uniform black carbon adsorption material. The method of the invention provides a way for treating a great deal of surplus plant ash in rural districts; at the same time, the black carbon adsorption material obtained by the method of the invention has the advantages of fine particles, high carbon content, large specific surface area and low cost, and can be widely applicable to the adsorption removal of pollutants in various polluted waters.

Description

(1) Technical field [0001] The invention relates to a method for extracting and preparing a black carbon adsorption material by using plant ash as a raw material. (2) Background technology [0002] Black carbon (English name: Black Carbon) is a carbon-containing aromatic high-polymerization product generated by incomplete combustion of biomass, petroleum, and coal in the environment. It is included in plant ash, coke, and soot (Cornelissen, G., Gustafsson, Bucheli, T.D., Jonker, M.T.O., Koelmans, A.A., Noort, P.C.M.V., Extensive Sorption of Organic Compounds to BlackCarbon, Coal, and Kerogen in Sediments and Soils: Mechanisms and Consequences for Distribution, Bioaccumulation, and Biodegradation, Technol. Sci. 2005, 39:6881-6895). It is estimated that there are 0.5-260 million tons of BC produced by combustion in the world every year (Masiello, C.A., Druffel, E.R.M., Black carbon indeep-sea sediments, Science, 1998, 280: 1911-1913), most of which will enter the soil and ...

Claims

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Application Information

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IPC IPC(8): B01J20/30
Inventor 邱宇平肖小雨郑珍芝盛光遥
Owner ZHEJIANG UNIV OF TECH
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