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Preparation method of magnetic charcoal for efficiently removing tetracycline

A biochar, tetracycline technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as adverse health effects, enhancement, etc., to promote sustainable development, important environmental protection, Simple preparation method

Active Publication Date: 2012-12-12
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that after the residual antibiotics enter the soil environment, they can induce the enhancement of microbial resistance in the soil, and can enter surface water and groundwater through various channels such as surface runoff and leaching, which may have potential adverse effects on human health. influences

Method used

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  • Preparation method of magnetic charcoal for efficiently removing tetracycline
  • Preparation method of magnetic charcoal for efficiently removing tetracycline
  • Preparation method of magnetic charcoal for efficiently removing tetracycline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Salvage and harvest the natural algal blooms, dry them in the sun, crush them, and pass them through a 100-mesh sieve;

[0018] 2. Preparation of magnetic biochar: Add 3 mmol of ferrous ammonium sulfate and 3 g of cyanobacteria with a dry weight of 3 g to each 100 ml of aqueous solution, mix evenly, and then sonicate for 1 h, then transfer to a 100 ml high-pressure reactor and react at 170 ° C for 12 h, then pass Centrifuge, wash, and dry to obtain magnetic biochar;

[0019] 3. The process of removing tetracycline: Add magnetic biochar to the tetracycline-containing wastewater according to the standard of adding 0.4 g magnetic biochar to the tetracycline-containing wastewater by adding the above-mentioned magnetic biochar with a concentration of 50 ppm to 50 ppm of the magnetic biochar, and at room temperature with The frequency of 140 rpm was oscillated for 5 hours for adsorption, and the removal efficiency was 87.1%.

Embodiment 2

[0021] 1. Salvage and harvest the natural algal blooms, dry them in the sun, crush them, and pass them through a 100-mesh sieve;

[0022] 2. Preparation of magnetic biochar: Add 3 mmol of ferrous ammonium sulfate and 3 g of cyanobacteria with dry weight to 100 ml of aqueous solution, mix evenly, then sonicate for 1 h, then transfer to 100 ml of high-pressure reaction axe, react at 190 ° C for 12 h, and then centrifuge , washing and drying to obtain magnetic biochar;

[0023] 3. The process of removing tetracycline: Add magnetic biochar to the tetracycline-containing wastewater according to the standard of adding 0.4 g magnetic biochar to the tetracycline-containing wastewater by adding the above-mentioned magnetic biochar with a concentration of 50 ppm to 50 ppm of the magnetic biochar, and at room temperature with Oscillating at a frequency of 140 rpm for 5 hours, the removal efficiency was 83.8%.

Embodiment 3

[0025] 1. Salvage and harvest the natural algal blooms, dry them in the sun, crush them, and pass them through a 100-mesh sieve;

[0026] 2. Preparation of magnetic biochar: Add 3 mmol of ferrous ammonium sulfate and 3 g of cyanobacteria with a dry weight to each 100 ml of aqueous solution, mix evenly, and sonicate for 1 h, then transfer to a high-pressure reaction ax and react at 210 ° C for 12 h, then centrifuge, Washing and drying to obtain magnetic biochar;

[0027] 3. The process of removing tetracycline: Add magnetic biochar to the tetracycline-containing wastewater according to the standard of adding 0.4 g magnetic biochar to the tetracycline-containing wastewater by adding the above-mentioned magnetic biochar with a concentration of 50 ppm to 50 ppm of the magnetic biochar, and at room temperature with Oscillating at a frequency of 140 rpm for 5 hours, the removal efficiency was 51.6%.

[0028] figure 1 Infrared spectra of magnetic biochar at different hydrothermal t...

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Abstract

The invention discloses a preparation method of magnetic charcoal for efficiently removing tetracycline. The preparation method comprises adding 1.5-9mmol ferrous sulfate ammonia and water bloom blue-green algae with dry weight of 3g in 100ml aqueous solution, evenly mixing to conduct ultrasound for 1h, transferring the solution to a high pressure reaction still to react 12h at the temperature of 170-210DEG C, and then obtaining the magnetic charcoal through centrifugation, washing and drying. The water bloom blue-green algae is prepared by salving and collecting natural water bloom blue-green algae, airing under the sun, smashing, and screening through a 100-mesh sieve. The preparation method combines iron and the charcoal, enables the charcoal to have magnetism, is apt to conduct magnetic separation after adsorption and greatly improves adsorption capacity of the charcoal on the tetracycline. The preparation method is simple and practical, uses waste to treat waste and has good application value.

Description

technical field [0001] The invention relates to a preparation method of magnetic biochar, in particular to a preparation method of magnetic biochar capable of efficiently removing tetracycline. Background technique [0002] Since the 1990s, the eutrophication of fresh water in my country has become more and more serious. More than 66% of the lakes and reservoirs are at the level of eutrophication. Some large lakes have successively broken out serious cyanobacteria blooms, such as Taihu Lake in Jiangsu, Chaohu Lake in Anhui, Dianchi Lake in Yunnan, etc. The biomass of cyanobacteria blooms is huge, and only Taihu Lake produces more than 200,000 tons of cyanobacteria pulp every year. The resource utilization of algal blooms has become an urgent problem to be solved in our country. In the preparation process of general magnetic carbon, substances such as glucose and starch are used as carbon sources, and the cost is relatively high. This patent uses algal blooms as a carbon so...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28
Inventor 彭亮曾清如秦普丰邵继海顾继东任艳清
Owner HUNAN AGRICULTURAL UNIV
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