Modified biochar and its preparation method and application

A biochar modification technology, applied in chemical instruments and methods, other chemical processes, water/sewage multi-stage treatment, etc., can solve problems such as poor decolorization effect, large consumption of flocculant, difficulty in filtration, etc., and achieve reduction Effect of treatment cost, increase in adsorption stability, and increase in adsorption capacity

Active Publication Date: 2018-11-27
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 biochar and its preparation method and application
  • Modified biochar and its preparation method and application
  • Modified biochar and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Determination of the adsorption capacity of acid-modified biomass charcoal

[0034] The preparation method of acid-modified biomass charcoal includes the following steps:

[0035] (1) Preparation of biomass charcoal

[0036] Rice husks, coconut husks, and wood chips collected from rural areas are crushed and mixed according to the mass ratio of rice husk, coconut husk and wood chips of 100~110:3~5:8~15. This example specifically selects six qualities. The ratios are 100:3:8, 100:5:8, 110:3:8, 110:5:8, 110:3:15 and 110:5:15, respectively, wash, air dry, and place in the vacuum / atmosphere tube Carbonized in an electric furnace at 400°C and nitrogen for 4 hours, and cooled to obtain 6 types of biomass carbon.

[0037] (2) Preparation of acid-modified biomass charcoal

[0038] Weigh 100g of the above 6 kinds of biomass charcoal in a reaction vessel, add 1L of hydrochloric acid solution with a concentration of 1mol / L, and soak in ultrasonic for 1h. Filter and separate, and collect ...

Embodiment 2

[0045] The modified biomass charcoal of the present invention is obtained by impregnating acid-modified biomass charcoal with a micellar system. The micellar system consists of an anionic biological surfactant, a cationic chemical surfactant and a humic acid solution.

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

[0047] In this embodiment, the biomass charcoal is obtained by carbonization after mixing rice husk, coconut husk and wood chips.

[0048] A method for preparing modified biomass charcoal of this embodiment includes the following steps:

[0049] (1) Preparation of biomass charcoal

[0050] The rice husk, coconut husk and sawdust collected from the countryside are crushed and mixed according to the mass ratio of rice husk, coconut husk and sawdust at 110:5:8, washed and air-dried, and heated in a vacuum / atmosphere tube electric furnace at 400℃ I...

Embodiment 3

[0058] The modified biomass charcoal of the present invention is obtained by impregnating acid-modified biomass charcoal with a micellar system. The micellar system consists of an anionic biological surfactant, a cationic chemical surfactant and a humic acid solution.

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

[0060] In this embodiment, the biomass charcoal is obtained by carbonization after mixing rice husk, coconut husk and wood chips.

[0061] A preparation method of the modified biomass charcoal of this embodiment is basically the same as the preparation method of Example 2, except that the volume ratio of the rhamnolipid solution, CTAB solution and humic acid solution in step (3) is 1 :6:20. The prepared modified biomass charcoal 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 specifically relates to a modified biomass charcoal and a preparation method and application thereof. Background technique [0002] Biomass charcoal is a carbon-rich, small-particle porous material produced by the pyrolysis of biomass under anoxic and high-temperature conditions. It has a large amount of electric charge on the surface and can adsorb heavy metals and organic pollutants in the water environment. Rice husk is a huge yield The use of agricultural waste to prepare biomass charcoal has great application potential in the field of wastewater treatment. The prior art mainly uses the characteristics of biomass charcoal with large specific surface area, rich pore structure, and the ability of surface functional groups to perform ion exchange with water pollutants to remove water pollutants. Due to the variety of pollutants in water and high water quality standards, the adju...

Claims

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Application Information

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Patent Type & Authority Patents(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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