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Preparation method of amino modified biochar

An amino-modified, biochar technology, applied in the field of environmental functional materials and water treatment, can solve the problems of low adsorption capacity and weak adsorption selectivity, achieve large adsorption capacity, improve adsorption capacity and adsorption selectivity, and prepare simple craftsmanship

Pending Publication Date: 2019-03-29
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing biochar still has problems such as low adsorption capacity and low adsorption selectivity in the adsorption process of heavy metals. Therefore, changing the chemical composition of the surface of biochar to improve its adsorption capacity and adsorption selectivity is an efficient application of biochar. key issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Use strange willow, reed and cotton straw as biomass raw materials, among which the quality of strange willow accounts for 40% of the total mass of biomass raw materials, and the quality of cotton straw accounts for 7% of the total mass of biomass raw materials;

[0024] Mix all the biomass raw materials and cut them to a length of 1 cm, dry them under hot air at 65°C for 24 hours, and crush them into 2mm-3mm granules;

[0025] Put the granular biomass raw material into a muffle furnace filled with nitrogen, heat it to 550°C, keep it for 4 hours, and generate biochar after cooling;

[0026] Take 1.5g of biochar and add 100mL of deionized water to mix, fully stir for 40min, then pour into the hydrothermal reactor, add 0.4g of triethylenediamine, heat to 60°C, keep it for 18h, take it out after cooling to get the amino-modified organism charcoal solution;

[0027] Take the aqueous solution of amino-modified biochar for suction filtration, add 35mL of deionized water to w...

Embodiment 2

[0031] Use strange willow, reed and cotton straw as biomass raw materials, among which the quality of strange willow accounts for 30% of the total mass of biomass raw materials, and the quality of cotton straw accounts for 5% of the total mass of biomass raw materials;

[0032] Mix all the biomass raw materials and cut them to a length of 1.5cm, dry them under hot air at 40°C for 24 hours, and crush them into 3mm-4mm granules;

[0033] Put the granular biomass raw material into a muffle furnace filled with nitrogen, heat it to 480°C, keep it for 4.5h, and generate biochar after cooling;

[0034] Take 1g of biochar and add 100mL of deionized water to mix, stir thoroughly for 30min, then pour it into a hydrothermal reactor, add 0.3g of triethylenediamine, heat it to 40°C, keep it for 16h, and take it out after cooling to get amino-modified biochar aqueous solution;

[0035] Take the aqueous solution of amino-modified biochar for suction filtration, add 30 mL of deionized water ...

Embodiment 3

[0039] Use strange willow, reed and cotton straw as biomass raw materials, among which the quality of strange willow accounts for 35% of the total mass of biomass raw materials, and the quality of cotton straw accounts for 8% of the total mass of biomass raw materials;

[0040] Mix all the biomass raw materials and cut them to a length of 2 cm, dry them under hot air at 70°C for 24 hours, and then crush them into granules of 2 mm to 4 mm;

[0041] Put the granular biomass raw material into a muffle furnace filled with nitrogen, heat it to 600°C, keep it for 5 hours, and generate biochar after cooling;

[0042] Take 5g of biochar and add 100mL of deionized water to mix, stir well for 60min, then pour into a hydrothermal reactor, add 2.0g of triethylenediamine, heat to 80°C, keep for 12h, take it out after cooling to get amino-modified biochar aqueous solution;

[0043]Take the aqueous solution of amino-modified biochar for suction filtration, add 50mL of deionized water to was...

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Abstract

The invention provides a preparation method of amino modified biochar. The method comprises the following steps of selecting biomass raw materials; drying the crushed biomass raw materials into a granular shape; charging the granular biomass raw materials into a muffle furnace fully filled with nitrogen gas; after thermal cracking reaction, generating the biochar; adding 100mL of deionized water into 1g to 5g of biochar for mixing; after the full stirring is performed for 30min to 60min; adding triethylene diamine; after heating is performed to 40 to 80 DEG C, maintaining the state for 12h to18h; performing cooling; generating an amino modified biochar water solution; sequentially performing suction filtration, washing, drying and cooling on the amino modified biochar water solution; preparing the amino modified biochar. Through the technical scheme, the prepared amino modified biochar has great adsorption capacity on heavy metal cadmium and lead; the separation coefficient is high; the preparation materials can be easily obtained; the preparation process is simple; the production cost is low.

Description

technical field [0001] The invention relates to the technical fields of environmental functional materials and water treatment, in particular to a method for preparing amino-modified biochar. Background technique [0002] The main principle of water heavy metal pollution remediation technology is to reduce the bioavailability and migration ability of heavy metals in water bodies, and to completely remove heavy metals from polluted water bodies. At present, there are various methods for treating heavy metal wastewater, which can be roughly summarized as physical methods (precipitation method, flotation method, filtration method, dilution method and water exchange method), chemical methods (neutralization method, chemical coagulation method, chemical precipitation method) and redox method), physical chemical method (adsorption ion exchange method, extraction method and membrane suction method) and biological method (phytoremediation, animal remediation, microbial remediation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/22C02F1/288C02F2101/20
Inventor 贾冬梅姚海波李晶夏江宝李长海
Owner BINZHOU UNIV
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