Biomass functional material for antibiotic adsorption and preparation method thereof

A functional material and biomass technology, which is applied in the deep processing of agricultural and forestry solid waste resources and environmental governance, can solve the problems of narrow application range of adsorption materials, long adsorption time, and production of other by-products, and achieve good adsorption effect of antibiotics and high adsorption capacity. Enhanced, convenient and efficient separation effect

Active Publication Date: 2022-05-24
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In water bodies of various matrices, antibiotics such as tetracycline are often found in sediments and silts, which lead to pollution of the surrounding environment, thereby disrupting the balance of the ecosystem
At present, the most common method is photocatalytic technology to treat antibiotic pollution, but conventional photocatalytic technology is not very effective in practical application, and may even produce other by-products during the removal process
The patent publication number is CN 110756168 A, which discloses a modified biochar adsorption material, which has low cost and is convenient to obtain, but the adsorption efficiency is low, and there are many residues that cannot be removed; Sodium alginate adsorption material, although the material is natural and pollution-free, has a wide range of uses, but the adsorption efficiency is low and the adsorption time is too long; the patent publication number is CN 111389374 A, and the patent publication number is CN112604643 A, which discloses a nanometer double metal oxide adsorbent , at a pH of 2-3, the removal rate of tetracycline in high-concentration tetracycline-containing wastewater reaches 85%.
However, there are still shortcomings such as narrow application range and low removal rate of adsorbent materials.

Method used

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  • Biomass functional material for antibiotic adsorption and preparation method thereof
  • Biomass functional material for antibiotic adsorption and preparation method thereof
  • Biomass functional material for antibiotic adsorption and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for preparing a basic biomass functional material for antibiotic adsorption, comprising the following steps:

[0048] (1) Dissolve 3.0 g of 15.0% persimmon tannin extract powder and 1.50 g of biochar in 100 mL of water, filter out insoluble impurities, and prepare 2.5 mL of glutaraldehyde aqueous solution with a mass fraction of 25.0% as cross-linking agent;

[0049] (2) Turn on the stirrer, vigorously stir the mixed solution of persimmon tannin extract and biochar at 25°C for 8 hours, and then adjust to 40°C and add 25% glutaraldehyde aqueous solution for cross-linking and curing for 8 hours; the preparation speed ranges from 300 to 1200 between rpm;

[0050] (3) Wash the cross-linked solidification with distilled water, filter, and vacuum dry at 50 °C for 20 h. Pulverize the material and sieve it to fine particles to obtain basic biomass functional materials for further use;

[0051] (4) Select oxytetracycline discharge wastewater with oxytetracycline conc...

Embodiment 2

[0056] A method for preparing basic biomass functional materials for antibiotic adsorption, comprising the following steps:

[0057] (1) Dissolve 3.0 g of persimmon tannin extract with 15.0% persimmon tannin and nitrogen-doped graphene in 100 mL of water, filter out insoluble impurities, and prepare 2.5 mL of 25.0% glutaraldehyde aqueous solution as cross-linking agent;

[0058] (2) Turn on the stirrer, stir the mixed solution of persimmon tannin extract and nitrogen-doped graphene at 25°C for 20h, then adjust to 40°C, add glutaraldehyde aqueous solution for cross-linking and curing for 20h; the stirring speed range is in Between 300 and 1200 rpm;

[0059] (3) Wash the cross-linked and solidified samples with distilled water and filter them, and vacuum dry them at 50°C for 20 hours; pulverize and sieve the materials to obtain basic biomass functional materials for further use;

[0060] (4) Select wastewater discharged from hospitals, pharmaceutical factories and other places...

Embodiment 3

[0065] A preparation method of a gel state biomass functional material for antibiotic adsorption, comprising the following steps:

[0066] (1) Preparation of water phase: Dissolve 3.0 g of the basic biomass functional material obtained in Example 2 in 100 mL of water, filter out insoluble impurities, and prepare 2.5 mL of N,N-methylenebisacrylamide with a concentration of 20%. Aqueous amide solution as crosslinking agent;

[0067] (2) Preparation of oil phase: 10ml of cyclohexane, 5ml of glycerol and 5ml of gluconolactone each were mixed into an oil phase system;

[0068] (3) Turn on the stirrer at 300-1200 rpm and stir the water phase system for 8h, then add 2.5ml, 25.0% glutaraldehyde for crosslinking and curing for 8h, wash away impurities with distilled water, and add the oil phase system of step (2) to mix at the same time uniform;

[0069] (4) Mix the water phase and the oil phase, add 100 ml of calcium carbonate solution with a concentration of 1 mol / L, and mix by ult...

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Abstract

The invention discloses a biomass functional material for antibiotic adsorption and a preparation method of the biomass functional material. The biomass functional material is prepared through A / B / C component synergism and function optimization combination. A component A persimmon tannin material with a polyphenol structure and a component B material with a large specific surface area and a porous structure characteristic are crosslinked to form a basic biomass functional material. The basic biomass functional material and different C component materials are subjected to chemical reaction through different chemical reagents, so that the basic biomass functional material has different functions, such as magnetic or gel state physical properties, and different environmental requirements are met. According to the biomass functional material prepared by the method, the removal rate of high-concentration antibiotic sewage reaches 91.5% in the pH range of 4-10. The material adopts various agricultural and forestry solid wastes as main materials, and is low in cost, green, environment-friendly, good in adsorption stability, free of secondary pollution and wide in application prospect in the field of ecological environment treatment and protection.

Description

technical field [0001] The invention relates to the technical field of deep processing and environmental treatment of agricultural and forestry solid waste resources, in particular to a biomass functional material for absorbing antibiotics and a preparation method thereof. Background technique [0002] There are many kinds of plant polyphenols, which are complex phenolic secondary metabolites in plants. They have a polyphenol structure and are mainly found in the bark, roots, leaves, and fruits of plants. The content in plants is second only to cellulose and hemifiber. and lignin. At present, the widely used plant polyphenol is persimmon tannin, which is used in medicinal and material environmental protection fields. Some agricultural and forestry solid waste resources have high tannin content, such as green persimmon fruit drop, persimmon residue, tea residue, grape seed (skin), apple peel, etc. Taking persimmon solid waste resources as an example, my country is a big pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/38C02F101/34
CPCB01J20/24B01J20/28009C02F1/286C02F2101/38C02F2101/34Y02E50/10
Inventor 王仲民刘松林王亚军周治德李桂银乔涛黄志民
Owner GUANGXI ACAD OF SCI
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