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Light rare earth magnetic composite activated charcoal as well as preparation method and application thereof

A composite activation and biochar technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of limited treatment effect of quinolone antibiotics, difficult separation and recovery of groundwater remediation materials, and specific surface area Low-level problems, to achieve significant adsorption effect, simple preparation method, and high specific surface area

Active Publication Date: 2018-12-11
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biochar prepared by the traditional pyrolysis carbonization method has problems such as low yield, low specific surface area, limited treatment effect on quinolone antibiotics, and difficult separation and recovery of groundwater remediation materials, resulting in limited practical application.

Method used

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  • Light rare earth magnetic composite activated charcoal as well as preparation method and application thereof
  • Light rare earth magnetic composite activated charcoal as well as preparation method and application thereof
  • Light rare earth magnetic composite activated charcoal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] according to figure 1 The flow chart shown prepares light rare earth magnetic composite activated biochar:

[0035] Step 1: After removing impurities from corn stalks, fully wash them with deionized water, put them in an oven and dry them at 60-80°C for 24 hours, and then crush them through a 100-mesh sieve with a plant grinder to obtain straw powder;

[0036] Step 2: mix the straw powder obtained in step 1 with zinc chloride according to the mass ratio of 4:1, place in a tube furnace, feed nitrogen into the tube furnace at a flow rate of 400mL / min, and then flow at 4°C / min Heat up to 700°C, pyrolyze for 4 hours, cool down to room temperature naturally, take out, wash with ethanol first, then wash with deionized water until neutral, and dry at 60-80°C to obtain activated biochar;

[0037] Step 3: fully impregnate the activated biochar obtained in step 2 with a mixture of iron salt and light rare earth metal soluble salt, the mixing mass volume ratio is 4:50, to ensure ...

Embodiment 2

[0041] Step 1: After removing impurities from corn stalks, fully wash them with deionized water, put them in an oven and dry them at 60-80°C for 24 hours, and then crush them through a 100-mesh sieve with a plant grinder to obtain straw powder;

[0042] Step 2: mix the straw powder obtained in step 1 with zinc chloride at a mass ratio of 5:1, place in a tube furnace, feed nitrogen into the tube furnace at a flow rate of 400mL / min, and then feed nitrogen gas at a flow rate of 3°C / min. Heat up to 800°C, pyrolyze for 5 hours, cool down to room temperature naturally, take out, wash with ethanol first, then wash with deionized water until neutral, and dry at 60-80°C to obtain activated biochar;

[0043] Step 3: fully impregnate the activated biochar obtained in step 2 with a mixture of iron salt and light rare earth metal soluble salt, the mixing mass volume ratio is 5:50, to ensure that the activated biochar is completely submerged, and the iron salt and light rare earth metal solu...

Embodiment 3

[0047] Step 1: After removing impurities from corn stalks, fully wash them with deionized water, put them in an oven and dry them at 60-80°C for 24 hours, and then crush them through a 100-mesh sieve with a plant grinder to obtain straw powder;

[0048] Step 2: mix the straw powder obtained in step 1 with phosphoric acid according to the mass volume ratio of 4:40, place in a tube furnace, feed nitrogen into the tube furnace at a flow rate of 400mL / min, and then flow at 5°C / min Heat up to 1000°C, pyrolyze for 3 hours, cool down to room temperature, take out, wash with ethanol first, then wash with deionized water until neutral, and dry at 60-80°C to obtain activated biochar;

[0049] Step 3: The activated biochar obtained in step 2 is fully impregnated with a mixture of iron salt and light rare earth metal soluble salt, the mixing mass volume ratio is 3:50, to ensure that the activated biochar is completely submerged, and the iron salt and light rare earth metal soluble salt are...

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Abstract

The invention discloses light rare earth magnetic composite activated charcoal as well as a preparation method and application thereof. Cheap and easy-to-obtain raw materials such as stalk waste are utilized; the light rare earth magnetic composite activated charcoal is fast prepared from activated charcoal, load iron and light rare earth metal. Compared with general charcoal, the prepared light rare earth magnetic composite activated charcoal has the advantages that the high specific surface area and strong absorption capability are realized; the specific surface area is higher than 750 m<2>*g<-1> and is higher than that of most reported magnetic porous carbon materials; the adsorption effect on quinolone antibiotics is obvious; the maximum adsorption quantity on the quinolone antibioticscan reach 12.27mg*g<-1>. Through the used iron salt, the charcoal has the magnetism; the recovery treatment of underground water after the restoration can be facilitated; the light rare earth magnetic composite activated charcoal belongs to a kind of novel, environmental-friendly low-cost adsorption agent with huge potential; a green technology is provided for the antibiotic pollution control; the environment problem due to waste biomass can be avoided; the goals of treating waste by waste and realizing cyclic economy are achieved.

Description

technical field [0001] The invention relates to light rare earth magnetic composite activated biochar for treating groundwater quinolone antibiotics and a preparation method thereof, belonging to the technical field of groundwater restoration. Background technique [0002] Antibiotics are one of the largest and most widely used drugs in the world. The global average annual use of antibiotics is 100,000-200,000 tons. Thousands of tons of antibiotics are used in livestock and poultry breeding, agricultural planting and in human medicine. According to statistics, in 2013, the use of antibiotics reached 92,700 tons, of which an estimated 54,000 tons of antibiotics were discharged into soil and water after use by humans and animals, 54% of antibiotics were discharged into water, and 46% of antibiotics were absorbed by soil. Generally speaking, the amount of antibiotics discharged in the east and south of my country is 6 times that of the west. Among them, the discharge of antibi...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30C02F103/06
CPCB01J20/06B01J20/20C02F1/281C02F1/283B01J20/28009C02F2103/06C02F2101/305
Inventor 朱迟王水王博曲常胜
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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