Preparation method of biochar material for efficiently removing organic pollutants in water

A technology of organic pollutants and biochar, applied in the field of environmental pollution control engineering, can solve problems such as limited adsorption capacity

Inactive Publication Date: 2020-08-11
江苏智诚达环保科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

However, its adsorption capacity is limited, and the material needs to be activated before use.

Method used

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preparation example Construction

[0019] In the present invention, a biochar material preparation method for efficiently removing organic pollutants in water, the steps are as follows: Step 1: Add a certain amount of dried coconut shells into water, the mass ratio of coconut shells to water is 1:10; Sodium hydroxide and urea (with a mass ratio of 1:1 to 1:5) are added to the aqueous solution with coconut shells, and the mass ratio of sodium hydroxide to coconut shells is 1:5 to 5:1. Stir at room temperature for 24h.

[0020] Step 2: Put the coconut shell treated in step 1 in an oven at 80° C., and ripen it for 24 to 48 hours. Afterwards, put the solid into a quartz dry pot, then place it in a tube furnace, use nitrogen as a protective gas, and heat up at a rate of 2 to 5°C / min. Select a staged heating method, and stay at 350 and 500°C for 1 hour, respectively. ~4h, finally the temperature rises to 700~1000°C, stay for 1~4h, then stop heating, keep the nitrogen atmosphere until the tube furnace drops to room t...

Embodiment 1

[0026] Add 10g of dried coconut shell to 50g of water. Then add 20g of sodium hydroxide and 30g of urea into the aqueous solution with coconut shell, and stir at room temperature for 24h. The solution was placed in an oven at 80°C until the reaction solution was completely dried. Afterwards, put the remaining solid into a quartz dry pot, and then place it in a tube furnace. Under a nitrogen atmosphere, the heating rate is 4°C / min, and the temperature is raised in stages, staying at 350 and 500°C for 2 hours, and finally the temperature is raised to To 800, 900 and 1000 ℃, stay 2h, then stop heating, keep the nitrogen atmosphere, until the tube furnace down to room temperature, three kinds of coconut shell biochar BC800, BC900 and BC1000 were obtained. Pour the BC800, BC900 and BC1000 materials obtained after step calcination into a beaker, and adjust the pH with 10% hydrochloric acid aqueous solution until the pH value reaches 7. Suction filtration, and then drying at 60 ° C...

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Abstract

The invention provides a preparation method of a biochar material for efficiently removing organic pollutants in water, and belongs to the technical field of environmental pollution control engineering. The preparation method of a biochar material for efficiently removing organic pollutants in water comprises the following steps: 1, adding a certain amount of dry coconut shells into water, addinga proper amount of sodium hydroxide and urea into the aqueous solution with coconut shells, and stirring for 24 hours at room temperature; 2, curing the coconut shells treated in the step 1 in a drying oven for 24-48h, putting the solid into a quartz dry pot, putting the quartz dry pot into a tubular furnace, heating at a heating rate of 2-5 DEG C/min by taking an inert gas as a protective gas, and heating in a sectional heating manner; and 3, pouring the material calcined in the step 2 into a beaker filled with deionized water, adjusting the pH value with a hydrochloric acid aqueous solutionuntil the pH value reaches 7, carrying out suction filtration, and drying at 60 DEG C to obtain a black biochar solid.

Description

technical field [0001] The invention provides a preparation method of a biochar material for efficiently removing organic pollutants in water, and belongs to the technical field of environmental pollution control engineering. Background technique [0002] Biochar is a kind of solid material obtained by pyrolysis and carbonization of biomass materials under oxygen-limited conditions. Its surface contains various functional functional groups such as carboxyl, hydroxyl, aromatic, and saturated fatty chains. In the process of high-temperature pyrolysis and carbonization, biochar will retain the pore structure and some functional groups of the original biomass to a certain extent, and a large number of macropores, mesopores and micropores will be formed after calcination. Large specific surface area and porosity. Biochar materials have the advantages of wide sources of raw materials and low prices. Such materials generally have strong adsorption properties and have been success...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/14C02F101/30
CPCB01J20/20B01J20/28054B01J2220/4825B01J2220/4837C02F1/281C02F2101/14C02F2101/30
Inventor 牛连勇
Owner 江苏智诚达环保科技有限公司
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