A kind of biomass waste activated carbon and preparation method thereof and application of nitrophenol compounds in the treatment of wastewater

A technology of biomass waste and activated carbon, which is applied in the field of activated carbon, can solve the problems of low carbon production rate of activated carbon, utilization rate of no more than 50%, and low adsorption capacity of activated carbon, and achieve stable performance, more recycling times, and increased adsorption capacity Effect

Active Publication Date: 2022-02-01
GANSU AGRI UNIV
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Problems solved by technology

Among them, there are many studies on the preparation of activated carbon by using biomass straw, but there are the following problems: first, the carbon production rate of activated carbon prepared by biomass straw is too low, and it is very rare to exceed 40% reported in the literature at present; The quality of activated carbon is not as good as that of coconut shells or other wood materials, resulting in low adsorption capacity of activated carbon; third, the high ash content in biomass straw is also the main factor that makes it difficult to meet the quality of activated carbon prepared by it
In 2017, the output of corn stalks in my country was 259.2 million tons, which is very huge, but the real effective utilization rate does not exceed 50%.
[0008] At present, the treatment of phenolic wastewater is mainly by catalytic oxidation. This method cannot completely remove phenol pollution, and it is very difficult to treat comprehensive wastewater.

Method used

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  • A kind of biomass waste activated carbon and preparation method thereof and application of nitrophenol compounds in the treatment of wastewater
  • A kind of biomass waste activated carbon and preparation method thereof and application of nitrophenol compounds in the treatment of wastewater
  • A kind of biomass waste activated carbon and preparation method thereof and application of nitrophenol compounds in the treatment of wastewater

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Experimental program
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Embodiment 1

[0040] Preparation of porous activated carbon material: Superfinely pulverize corn stalks until the D90 is greater than 2500 mesh, weigh 100g and put it into a 500ml flask, add 300g of distilled water, heat activate at 150°C for 15h, then cool to room temperature, add initiators successively Potassium sulfate 0.5g and 125g 2-acrylamido-2-methyl-1-propanesulfonic acid were pre-reacted under nitrogen atmosphere at 80°C for 1h, the reaction mixture was frozen in liquid nitrogen, and then 0.05g N,N-methylenebis Acrylamide is used as a cross-linking agent, degassed more than 10 times, slowly heated to 70°C under nitrogen protection, and kept at this temperature for more than 10 hours. After the reaction, the obtained polymer sample was pulverized to 2-3 mm particles and dried. Take 100g of the dried sample, place it in 500mL of 10% sodium bicarbonate solution and let it stand for more than 24h, filter the product, ventilate and dry, put the dried sample treated with sodium bicarbon...

Embodiment 2

[0052] Preparation of porous activated carbon material: Superfinely pulverize corn stalks until the D90 is greater than 2500 mesh, weigh 100 g and put it into a 500 ml flask, add 300 g of distilled water, heat activate at 100 ° C for 20 h, then cool to room temperature, add initiators in sequence Potassium sulfate 0.1g and 50g 2-acrylamido-2-methyl-1-propanesulfonic acid were pre-reacted under nitrogen atmosphere at 70°C for 1.5h, the reaction mixture was frozen in liquid nitrogen, and then 0.01g N,N-methylene was added Bisacrylamide was used as a cross-linking agent, degassed more than 10 times, under the protection of nitrogen, slowly heated to 80°C, and kept at this temperature for 15h. After the reaction, the obtained polymer sample was pulverized to 2-3 mm particles and dried. Take the dried sample 100g, place it in 500mL 5% sodium bicarbonate solution and let it stand for 30h, filter the product, ventilate and dry, put the dried sample treated with sodium bicarbonate in ...

Embodiment 3

[0054] Preparation of porous activated carbon material: Superfinely pulverize corn stalks until the D90 is greater than 2500 mesh, weigh 100 g and put it into a 500 ml flask, add 300 g of distilled water, heat activate at 170 °C for 10 h, then cool to room temperature, add initiators successively Potassium sulfate 1g and 250g 2-acrylamido-2-methyl-1-propanesulfonic acid were pre-reacted under a nitrogen atmosphere at 90°C for 0.5h, the reaction mixture was frozen in liquid nitrogen, and then 0.1g N,N-methylenebis Acrylamide was used as a cross-linking agent, degassed more than 10 times, under the protection of nitrogen, slowly heated to 50 ° C, and kept at this temperature for 8 hours. After the reaction, the obtained polymer sample was pulverized to 2-3 mm particles and dried. Take the dried sample 100g, place it in 500mL 20% sodium bicarbonate solution and let it stand for 15h, filter the product, ventilate and dry, put the dried sample treated by sodium bicarbonate into a r...

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Abstract

The invention discloses a method for preparing activated carbon from biomass waste. The preparation method comprises the following steps: (a) grafting 2-acrylamido-2-methyl-1-propanesulfonic acid onto the surface of biomass waste (b) a step of carbonizing the biomass waste treated in step (a) to obtain activated carbon. Compared with the existing technology, the biomass activated carbon prepared by this method not only has a good adsorption capacity for p-nitrophenol, which can reach more than 480 mg / g, but also can almost completely remove lead ions, chromium ions, nickel ions in water at the same time ions and arsenic ions, good cycle stability, more than 5 cycles, the adsorption capacity is still above 98%, it is a multi-functional comprehensive wastewater adsorbent.

Description

technical field [0001] The invention belongs to the field of activated carbon, and in particular relates to an activated carbon with excellent adsorption effect on p-nitrophenol compounds prepared from biomass waste. Background technique [0002] Biomass waste mainly includes microorganisms, plants and animals, as well as their excreta, garbage and organic waste water and other organic substances derived from living organisms. Biomass waste is the waste produced and consumed by humans in the process of utilizing biomass. It still belongs to the macroscopic category of biomass, but its energy density and availability have decreased significantly. [0003] At present, there is a large amount of biomass waste in rural areas of our country, such as various plant straws, corn cob cores, potato starch residues, wine residues, animal manure, etc. Just taking plant straw as an example, my country produces a total of one trillion kilograms of biomass waste every year, which consists...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20C02F101/22C02F101/34C02F101/38C02F103/16
CPCB01J20/20C02F1/281C02F2101/38C02F2101/345C02F2101/20C02F2101/22C02F2103/16
Inventor 刘雅妮秦丽娟薛华丽
Owner GANSU AGRI UNIV
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