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Porous biochar based on typha orientalis derivation and production method and application of porous biochar based on typha orientalis derivation

A technology of biochar and cattail, applied in the field of porous biochar, can solve the problems of low efficiency of levofloxacin and the like

Active Publication Date: 2019-12-20
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low levofloxacin adsorption efficiency of existing activated carbon, the present invention provides a preparation method based on cattail derived porous biochar, the porous biochar prepared by the method can efficiently adsorb levofloxacin in water in a short time

Method used

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  • Porous biochar based on typha orientalis derivation and production method and application of porous biochar based on typha orientalis derivation
  • Porous biochar based on typha orientalis derivation and production method and application of porous biochar based on typha orientalis derivation
  • Porous biochar based on typha orientalis derivation and production method and application of porous biochar based on typha orientalis derivation

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Wash, dry, crush, and pass through a 200-mesh sieve to obtain cattail powder, then place the cattail powder in a tube furnace, and under oxygen-isolated conditions, raise the temperature to 450°C at a rate of 10°C / min, keep it for 2 hours, and pass through 2mol / Wash with L hydrochloric acid and pure water to neutrality, and dry to obtain biochar.

[0029] Fully grind the biochar with twice the mass ratio of potassium carbonate for 20 minutes, place it in an anaerobic tube furnace, raise the temperature to 900°C at a rate of 10°C / min, keep it for 2 hours, and pass through 2mol / L hydrochloric acid and pure Wash with water until neutral, and dry to obtain porous biochar, referred to as MPCS-900.

[0030] In order to study MPCS-900 further, the inventor scanned it with an electron microscope, and the results are as follows figure 1 As shown, the scanning electron microscope image shows that MPCS-900 is an irregular, stacked lamellar structure. According to the transmissio...

Embodiment 2

[0038] The influence of embodiment 2 calcining temperature on material adsorption performance

[0039] Weigh 10mg of the porous biochar MPCS-900 prepared in Example 1 and the CP-500 and CP-700 prepared in Comparative Example 1 respectively in three 250mL conical flasks with stoppers, and add the calculated Pure water, ultrasonic 5min until the solution is uniform, then add levofloxacin of known concentration to make the total volume 100mL, wherein the initial concentration of levofloxacin is 30mg / L, adjust pH=7.0±0.1, put the above device in a constant temperature oscillator ( 150rpm, 25 DEG C), get a point at regular intervals, then pass through a 22um filter head, detect the absorbance of its sample with a UV-Vis spectrophotometer, calculate the levofloxacin concentration according to the absorbance, draw the time-removal rate adsorption curve according to the levofloxacin concentration ( see Figure 6 , removal rate%=(C 0 -C e )×100% / C 0 ), among them, the adsorption ra...

Embodiment 3

[0040] Embodiment 3 different activating reagents influence on the adsorption performance of adsorbent material

[0041] Weigh 10 mg of the porous biochar MPCS-900 prepared in Example 1, CS-900 and CPH-700 prepared in Comparative Example 2 into 250 mL of three conical flasks with stoppers, add the calculated pure water, and ultrasonicate for 5 minutes Until the solution is uniform, then add levofloxacin of known concentration to make the total volume 100mL, and make the initial concentration of levofloxacin in it be 30mg / L, adjust pH=7.0±0.1, put the above-mentioned device in a constant temperature oscillator (150rpm, 25 ℃), take a point every certain interval, then pass through a 22um filter head, and use a UV-visible spectrophotometer to detect the absorbance of the sample. The blank experiment (without adsorbent) is also the same operation, and its time-removal rate adsorption curve see Figure 7 , it can be seen that the adsorption properties of porous biochars prepared b...

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Abstract

The invention belongs to the field of functional materials and environmental water treatment, and particularly relates to a production method of porous biochar based on typha orientalis derivation. The production method of the porous biochar based on typha orientalis derivation specifically comprises the following steps: (1) under a condition isolated from oxygen, placing typha orientalis powder in a sealed container, elevating temperature to 400-500 DEG C, conducting carbonization for 4 h, reducing the temperature to room temperature, taking out an obtained product, washing the product with hydrochloric acid and water until the product is neutral, and conducting drying to obtain biochar; and (2) mixing the biochar and potassium carbonate according to a mass ratio of (1 to 2) to (2 to 4),fully grinding an obtained mixture, then placing a fully-ground mixture in a sealed container, under a condition isolated from oxygen, elevating temperature to 850-950 DEG C, conducting activation for1.5-3 h, reducing the temperature to the room temperature, taking out an obtained product, washing the product with hydrochloric acid and water until the product is neutral, and conducting drying toobtain the porous biochar. The porous biochar can efficiently adsorb levofloxacin in a water body in short time, fast removes the levofloxacin in the water body, benefits large-scale removal of the levofloxacin, and has practical application values.

Description

technical field [0001] The invention belongs to the field of functional materials and environmental water treatment, and in particular relates to a cattail-based porous biochar, its preparation method and application. Background technique [0002] Antibiotics are a new type of environmental pollution, which not only poses a threat to the ecological environment, but also seriously affects human health. The environmental and health problems caused by the abuse of antibiotics need to be resolved urgently. The use of antibiotics is mainly to prevent and treat human and animal diseases, eliminate agricultural diseases and insect pests and other aspects. Relevant surveys show that my country is a big country in the use of antibiotics, and they are mainly used in medical and agricultural industries. Due to the extremely low metabolic rate of antibiotics in humans and animals, more and more antibiotics have been detected in the environment. This brings about the environmental pro...

Claims

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Application Information

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IPC IPC(8): C01B32/324C01B32/348B01J20/20B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/3021B01J20/3071B01J20/3078B01J2220/485C01P2002/80C01P2002/82C01P2004/03C01P2006/17C02F1/283C02F2101/305C01B32/324C01B32/348
Inventor 陈一何强阳东旭方俊华李果
Owner CHONGQING UNIV
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