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A kind of biomass water treatment agent based on porous coffee grounds and preparation method thereof

A technology of water treatment agent and coffee grounds, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve difficult conditions and control, cumbersome manufacturing process, and large consumption of chemical materials problems such as good adsorption, simple drying equipment, and the realization of the preparation process

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing process of the above patents is cumbersome, the conditions are difficult and controlled, and a large amount of chemical materials are required to be processed. Therefore, the water treatment agents prepared by these methods have certain limitations in actual use.

Method used

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  • A kind of biomass water treatment agent based on porous coffee grounds and preparation method thereof
  • A kind of biomass water treatment agent based on porous coffee grounds and preparation method thereof
  • A kind of biomass water treatment agent based on porous coffee grounds and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The natural coffee grounds were selected and photographed with a scanning electron microscope to obtain Figure 1a , Figure 1a Parts A and B of the figure are the effect pictures observed under different magnifications, respectively.

Embodiment 2

[0047] Weigh 100g of natural coffee grounds and soak in 1000mL of 5wt% sodium hydroxide solution, heat at 90°C for 2 hours, filter and wash with water to remove most of the fatty acids and lignin. 20g sodium chlorite is added in the sodium acetate / acetic acid buffer solution of 100mL again, mix well, obtain sodium chlorite solution, the pH value of described sodium chlorite solution is 4.8; The above-mentioned 100g delignified coffee grounds Add to sodium chlorite solution, mix evenly, heat for decolorization treatment, the temperature of decolorization treatment is 90°C, the time of decolorization treatment is 1.5 hours, filter to collect precipitate, dry in fume hood for 18 hours, put in refrigerator -5°C Freezing, and then freeze-drying to obtain a decolorized product (delignified white coffee grounds). SEM images of delignified white coffee grounds Figure 1b . Figure 1b Parts C and D are the renderings of the delignified white coffee grounds prepared in Example 2 at di...

Embodiment 3

[0049] Add 0.6g of 37% concentrated hydrochloric acid into 100mL of distilled water, then dissolve 0.15g of palladium chloride into the prepared hydrochloric acid solution, and heat at 60°C for 30min. Add 10 g of the delignified white coffee grounds prepared in Example 2 to the palladium chloride hydrochloric acid solution, adjust the heating temperature to 90° C., react for 9 hours, filter to collect the precipitate, and freeze-dry to obtain the porous coffee grounds Biomass water treatment agent (nano palladium modified porous coffee grounds). SEM images of nano-palladium-modified porous coffee grounds Figure 1c . Figure 1c Part E and part F are the effect diagrams of the porous coffee grounds-based biomass water treatment agent prepared in Example 3 at different magnifications.

[0050] Depend on Figure 1a , Figure 1b with Figure 1c It can be found that the surface pores of natural coffee grounds are small and irregular due to the filling of fatty acids and lignin;...

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Abstract

The invention discloses a biomass water treatment agent based on porous coffee grounds and a preparation method thereof. The method comprises: soaking coffee grounds in sodium hydroxide solution, heating and washing with water to obtain coffee grounds from which a large amount of fatty acid and lignin have been removed; adding sodium chlorite into sodium acetate buffer solution and mixing evenly to obtain sodium chlorite solution; add coffee grounds that have removed a large amount of fatty acids and lignin into sodium chlorite solution, heat and decolorize, and dry to obtain a decolorized white mesoporous product; after dissolving palladium chloride in hydrochloric acid solution, the decolorized product Added into hydrochloric acid solution, heated, filtered and dried to obtain a biomass water treatment agent based on porous coffee grounds. The preparation process of the method is simple, and the provided biomass water treatment agent based on porous coffee grounds has a rich nano- and micro-level porous structure, which can increase the contact area between methylene blue and palladium in sewage, and prolong the contact time. , can better absorb methylene blue in water.

Description

technical field [0001] The invention belongs to the field of coffee grounds processing, and mainly relates to a biomass water treatment agent based on porous coffee grounds and a preparation method thereof. Background technique [0002] Coffee is one of the most popular beverages in the world. According to the statistics of the International Coffee Organization (ICO), 650 kg of coffee grounds can be produced per 1 ton of coffee beans, and 2 kg of wet coffee grounds can be produced for every 1 kg of instant coffee prepared. About 2 billion cups of coffee are consumed in the world every day. Faced with the waste of resources that is greater than edible waste, scientific and technical personnel start from the coffee grounds themselves and apply coffee grounds to chemical compost and animal feed, and use coffee grounds oil to produce biodiesel. From the microscopic discovery of the porous structure of coffee grounds to the production of activated carbon, the production of therm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/24B01J20/30C02F101/36C02F101/38
CPCB01J20/24C02F1/286C02F2101/36C02F2101/38C02F2101/40
Inventor 田君飞产慧芳石聪灿陈广学何明辉
Owner SOUTH CHINA UNIV OF TECH
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