A kind of plant cellulose adsorption sponge, its preparation method and application

A plant cellulose and sponge technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve the problems of difficult to achieve solid-liquid separation, increase the cost of treatment process, loss of adsorption materials, etc. Economic cost and labor effort, easy solid-liquid separation, strong adsorption capacity

Active Publication Date: 2022-05-03
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the grass-modified adsorption materials obtained by the above modification methods are in the form of powders. Although they have a certain removal effect on heavy metal ions such as lead, copper, and cadmium, powdery adsorption materials are not only difficult to achieve solid-liquid separation, but also increase the It reduces the difficulty of subsequent treatment, and when using devices such as fixed beds or packed columns for continuous flow wastewater treatment, powdery materials are likely to cause pressure drop and loss of adsorption materials, increasing the cost of the treatment process

Method used

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  • A kind of plant cellulose adsorption sponge, its preparation method and application

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Embodiment 1

[0030] A kind of embodiment of the preparation method of plant cellulose absorption sponge of the present invention, it comprises the following steps:

[0031] (1) cleaning the collected turfgrass with water to remove impurities, then drying and grinding to obtain grass powder;

[0032] (2) Weigh 1 g of the grass powder obtained by step (1), add 50 mL of sodium hydroxide solution with a mass fraction of 14% and 3 mL of carbon disulfide, and continuously stir and react at room temperature for 6 hours. After the reaction, centrifuge at a speed of 8000 rpm Collect the solid product after the reaction, and repeatedly wash with deionized water until the solid product is neutral;

[0033] (3) Mix the neutral solid product obtained in step (2) and pour it into a container of a certain shape, such as a 50mL, 100mL beaker of different specifications, and then store it at -20°C, -50°C, -80°C Or rapidly freeze at -198° C. until completely agglomerated, and then freeze and vacuum-dry to ...

Embodiment 2

[0035] A kind of embodiment of the preparation method of plant cellulose absorption sponge of the present invention, it comprises the following steps:

[0036] (1) cleaning the collected turfgrass with water to remove impurities, then drying and grinding to obtain grass powder;

[0037](2) Weigh 0.5 g of grass powder obtained through step (1), add 40 mL of sodium hydroxide solution and 0.5 mL of carbon disulfide with a mass fraction of 5%, and continuously stir and react at room temperature for 6 hours. The solid product after the reaction was collected by rotating speed centrifugation, and was repeatedly washed with deionized water until the solid product was neutral;

[0038] (3) Mix the neutral solid product obtained in step (2) and pour it into a container of a certain shape, such as a 50mL, 100mL beaker of different specifications, and then store it at -20°C, -50°C, -80°C Or rapidly freeze at -198° C. until completely agglomerated, and then freeze and vacuum-dry to obtai...

Embodiment 3

[0040] A kind of embodiment of the preparation method of plant cellulose absorption sponge of the present invention, it comprises the following steps:

[0041] (1) cleaning the collected turfgrass with water to remove impurities, then drying and grinding to obtain grass powder;

[0042] (2) Weigh 0.5g of grass powder obtained by step (1), add 70mL of sodium hydroxide solution and 2mL of carbon disulfide with a mass fraction of 15%, and continuously stir and react at room temperature for 12h. The solid product after the reaction was collected by centrifugation, and was repeatedly washed with deionized water until the solid product was neutral;

[0043] (3) Mix the neutral solid product obtained in step (2) and pour it into a container of a certain shape, such as a 50mL, 100mL beaker of different specifications, and then store it at -20°C, -50°C, -80°C Or rapidly freeze at -198° C. until completely agglomerated, and then freeze and vacuum-dry to obtain a turfgrass adsorption sp...

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Abstract

The invention provides a plant cellulose adsorption sponge, its preparation method and application, and belongs to the field of adsorption materials and water treatment. The preparation method of the plant cellulose adsorption sponge of the present invention is through grinding or pulverizing the plant cellulose raw material, reacting with alkali solution and carbon disulfide, collecting the solid product after the reaction and washing it with deionized water to neutrality, and then freezing and freezing Dried to obtain plant cellulose adsorption sponge. The plant cellulose adsorption sponge prepared by the preparation method of the plant cellulose adsorption sponge of the present invention has controllable shape and size, good mechanical properties, is not easy to break, has interconnected rich pore structures, and has strong adsorption capacity, and can be used to remove heavy metals in wastewater Pollutants such as ions.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials and water treatment, and relates to a plant cellulose adsorption sponge, a preparation method and application thereof. Background technique [0002] While the advancement of industrial technology has brought convenience to human life, it has also caused inevitable environmental pollution, especially heavy metal pollution. Heavy metals are non-biodegradable and bioaccumulative. They can enter the human body through water, food chain, breathing, etc., accumulate in the body, and cause serious harm to human health. With the rapid development of advanced technologies such as heavy industry, electronics, and aerospace in my country, social activities such as mining, metal smelting, chemical production, fossil fuel combustion, large-scale application of pesticides and fertilizers, and random disposal of domestic garbage have become increasingly frequent, which has intensified the release of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/24B01J20/28045C02F1/286C02F2101/20
Inventor 王娜娜邱钰茵肖唐付殷茹
Owner GUANGZHOU UNIVERSITY
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