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Preparation method and application of adsorbent

An adsorbent and pretreatment technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve problems such as patents for antibiotic adsorbents that have not yet been seen, and achieve cost reduction, migration control, Reduce the effect of processing

Inactive Publication Date: 2013-09-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there have been no reports of invention patents, research literature, etc. using abandoned bauxite tailings and diatomite as raw materials to prepare antibiotic adsorbents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) The bauxite tailings (Al: 37%, Si: 25%, Fe: 7.2%, Ti: 2.6%) from Zhongzhou Branch of Aluminum Corporation of China, Jiaozuo, Henan were crushed through a 180-mesh sieve to obtain pretreated bauxite tailings;

[0021] (2) Immerse commercially available diatomite with nitric acid for 6 hours at 40°C, filter it with suction, dry it in an oven at 70°C for 6 hours, and then calcinate it in a muffle furnace at 800°C for 4 hours to obtain pretreated silicon algae earth;

[0022] (3) Add 5g of pretreated bauxite tailings to 5g of pretreated bauxite tailings, mix with water in a mortar, mix and grind evenly, dry in an oven at 70°C for 12h, and roast at 600°C for 8h to obtain Adsorbent powder;

[0023] (4) Weigh 0.025g of the prepared adsorbent powder and add it to 25mL of four antibiotic solutions containing amoxicillin, tetracycline, sulfadiazine and oxytetracycline, stir for 30min, centrifuge and precipitate at 3500r / min, and take the supernatant The adsorption rate was...

Embodiment 2

[0025] (1) The bauxite tailings (Al: 37%, Si: 25%, Fe: 7.2%, Ti: 2.6%) from Zhongzhou Branch of Aluminum Corporation of China, Jiaozuo, Henan were crushed through a 190-mesh sieve to obtain pretreated bauxite tailings;

[0026] (2) Immerse the commercially available diatomite with nitric acid for 5 hours at 50°C, filter it with suction, dry it in an oven at 85°C for 5.5 hours, and then calcinate it in a muffle furnace at 850°C for 3 hours to obtain the pretreated diatomite;

[0027] (3) Add 1.25 g of pretreated diatomite to 5 g of pretreated bauxite tailings and mix evenly, put it in an oven for 11 hours at 75°C, and then roast at 700°C for 6 hours to obtain adsorbent powder;

[0028] (4) Weigh 0.1g of the prepared adsorbent powder and add it to 25mL aqueous solution containing four antibiotics: amoxicillin, tetracycline, sulfadiazine and oxytetracycline, stir for 60min, centrifuge and precipitate at 3500r / min, and take the upper layer The adsorption rate of the supernatant ...

Embodiment 3

[0030] (1) The bauxite tailings (Al: 37%, Si: 25%, Fe: 7.2%, Ti: 2.6%) from Zhongzhou Branch of Aluminum Corporation of China, Jiaozuo, Henan were crushed through a 195-mesh sieve to obtain pretreated bauxite tailings;

[0031] (2) The commercially available diatomite was impregnated with nitric acid for 4 hours at 55°C, filtered with suction, dried in an oven at 80°C for 5 hours, and then calcined in a muffle furnace at 1000°C for 2 hours to obtain pretreated diatomite diatomite;

[0032] (3) Add 0.625 g of pretreated diatomaceous earth to 5 g of pretreated bauxite tailings and mix evenly, put it in an oven for 12 hours at 80°C, and then roast at 800°C for 8 hours to obtain adsorbent powder;

[0033] (4) Weigh 0.2g of the prepared adsorbent powder and add it to 25mL aqueous solution containing four antibiotics: amoxicillin, tetracycline, sulfadiazine and oxytetracycline, stir for 100min, centrifuge and precipitate at 3500r / min, and take the upper layer The adsorption rate o...

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Abstract

The invention discloses a preparation method and an application of an adsorbent. Raw materials of the adsorbent are derived from monohydrallite tailings and diatomite, the raw materials are rich, the cost is low, and a good absorption effect of the obtained adsorbent is achieved. Monohydrallite and preprocessed diatomite in different proportions are uniformly mixed and roasted to obtain a composite adsorbent; prepared absorption materials can be used for absorbing multiple antibiotics in pharmaceutical wastewater. The preparation method and the application are proposed for solving the problem that a large quantity of antibiotics exist in the pharmaceutical wastewater, the antibiotics can be recovered and enriched, and the migration of the antibiotics in the natural world is inhibited. According to the preparation method and the application, the monohydrallite tailings serving as wastes and the diatomite serving as cheap natural minerals are used as raw materials, and the composite adsorbent is synthetized by using a high-temperature solid-phase method. Compared with an existing technology, the preparation method and the application have the advantages that the monohydrallite raw material is a solid waste, the diatomite raw material is low in cost and easily-available, the preparation process is simple, the industrial production is easily realized, and the aim of treating wastes by using wastes is fulfilled.

Description

technical field [0001] The invention relates to a preparation method and application of an adsorbent, which belongs to the environmental water pollution treatment technology. Background technique [0002] At present, the comprehensive utilization of bauxite tailings in my country cannot be applied to industrial production. This not only wastes bauxite resources, but also occupies a large amount of land resources. Therefore, the comprehensive utilization of bauxite tailings is extremely important. The main component is Al 2 o 3 , due to Al 2 o 3 It has the characteristics of fineness, looseness, porosity, water absorption and strong permeability, so it can remove solid particles, suspended particles, colloidal particles and bacteria in the liquid, and plays the role of filtering and purifying the liquid. But Al 2 o 3 When used alone as an adsorbent, the adsorption is unstable, so it is of great significance to study its modification as a stable adsorbent. [0003] The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28
Inventor 陕绍云李三妹贾庆明蒋丽红王亚明
Owner KUNMING UNIV OF SCI & TECH
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