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Modified bio-char as well as preparation method and application thereof

A biochar modification technology, applied in chemical instruments and methods, other chemical processes, multi-stage water treatment, etc., can solve the problems of difficult filtration, large consumption of flocculant, poor decolorization effect, etc., and increase the adsorption capacity , reduce processing costs, increase the effect of dispersion

Active Publication Date: 2017-02-15
HUNAN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of treating wastewater with flocculants, there are often problems such as large consumption of flocculants, difficulty in filtration, poor decolorization effect, and a large amount of new waste residues.

Method used

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  • Modified bio-char as well as preparation method and application thereof
  • Modified bio-char as well as preparation method and application thereof
  • Modified bio-char as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Determination of Adsorption Capacity of Acid-Modified Biochar

[0034] The preparation method of the biochar of acid modification comprises the following steps:

[0035] (1) Preparation of biochar

[0036] The rice husks, coconut shells and wood chips collected from the countryside are crushed, and mixed according to the mass ratio of rice husks, coconut shells and wood chips of 100 to 110: 3 to 5: 8 to 15. In this embodiment, six mass Ratio, respectively 100:3:8, 100:5:8, 110:3:8, 110:5:8, 110:3:15 and 110:5:15, washed, air-dried, in vacuum / atmosphere tube Carbonization was carried out in an electric furnace at 400 °C for 4 h under the protection of nitrogen, and six kinds of biochars were obtained after cooling.

[0037] (2) Preparation of acid-modified biochar

[0038] Weigh 100 g of the above 6 kinds of biochars respectively and place them in a reaction vessel, add 1 L of hydrochloric acid solution with a concentration of 1 mol / L, and ultrasonically soak for 1 h....

Embodiment 2

[0045] A modified biochar of the present invention is obtained by impregnating acid-modified biochar through a micelle system, and the micelle system is composed of anionic biosurfactant, cationic chemical surfactant and humic acid solution.

[0046] In this embodiment, the anionic biosurfactant is rhamnolipid; the cationic chemical surfactant is cetyltrimethylammonium bromide, a quaternary ammonium salt surfactant.

[0047] In this example, the biochar is obtained by carbonization after mixing rice husk, coconut shell and sawdust.

[0048] A preparation method of the modified biochar of the present embodiment, comprising the following steps:

[0049] (1) Preparation of biochar

[0050] The rice husks, coconut shells, and sawdust collected from the countryside were crushed, mixed according to the mass ratio of rice husks, coconut shells, and wood chips at 110:5:8, washed, air-dried, and heated at 400°C in a vacuum / atmosphere tube-type electric furnace. Carbonize under the pr...

Embodiment 3

[0058] A modified biochar of the present invention is obtained by impregnating acid-modified biochar through a micelle system, and the micelle system is composed of anionic biosurfactant, cationic chemical surfactant and humic acid solution.

[0059] In this embodiment, the anionic biosurfactant is rhamnolipid; the cationic chemical surfactant is cetyltrimethylammonium bromide, a quaternary ammonium salt surfactant.

[0060] In this example, the biochar is obtained by carbonization after mixing rice husk, coconut shell and sawdust.

[0061] A preparation method of the modified biochar of the present embodiment is basically the same as the preparation method of embodiment 2, the difference is that the volume ratio of rhamnolipid solution, CTAB solution and humic acid solution in step (3) is 1 :6:20. The prepared modified biochar is numbered II.

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Abstract

The invention discloses modified bio-char as well as a preparation method and an application thereof. The modified bio-char is obtained by impregnating acid modified bio-char with a micellar system, wherein the micellar system comprises an anionic biosurfactant, a cationic chemical surfactant and a humic acid solution. The preparation method comprises the following steps: (1) preparing bio-char; (2) preparing the acid modified bio-char; (3) preparing the micelle modified bio-char. The modified bio-char has the advantages of high adsorption capacity, high adsorption stability, good dispersibility in water and the like; the modified bio-char and a ferric salt flocculant are combined to be applied to removal of phenol from industrial wastewater, can realize integration of adsorption and flocculation, improve the flocculation effect of a water treatment agent, shorten time of a treatment process and reduce waste residues.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a modified biomass charcoal and its preparation method and application. Background technique [0002] Biochar is a carbon-rich, small-particle porous material produced by pyrolysis of biomass under anoxic and high-temperature conditions. It has a large amount of charge on the surface and can absorb heavy metals and organic pollutants in the water environment. The use of agricultural waste to prepare biochar has great application potential in the field of wastewater treatment. The existing technology mainly utilizes the characteristics of large specific surface area, rich pore structure, and the ability of surface functional groups to perform ion exchange with water pollutants to remove pollutants in water. Due to the variety of pollutants in water and high water quality standards, the adjustment range of general biochar surface groups is narrow, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F9/04
CPCB01J20/20B01J20/22B01J20/24B01J2220/46B01J2220/4812B01J2220/4825C02F1/001C02F1/28C02F1/283C02F1/285C02F1/286C02F1/5236C02F1/66C02F9/00C02F2301/08
Inventor 刘欢刘凌波邱德跃张燕陈灿马林
Owner HUNAN CHEM RES INST
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