Method for adsorbing antibiotics in water by using silver-ytterbium modified biochar

A biochar and antibiotic technology, applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of complicated biofilm culture process, easy pollution of membrane surface, and high requirements for reaction conditions, etc. Treatment way, shorten the time required for adsorption, good adsorption effect

Active Publication Date: 2021-10-01
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biofilm method has excellent removal performance, but there are disadvantages such as easy contamination of the membrane surface, high requirements for reaction conditions, and complicated biofilm cultivation process.

Method used

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  • Method for adsorbing antibiotics in water by using silver-ytterbium modified biochar
  • Method for adsorbing antibiotics in water by using silver-ytterbium modified biochar
  • Method for adsorbing antibiotics in water by using silver-ytterbium modified biochar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of silver ytterbium modified biochar is:

[0034] (1) Wash the fungus residue, bake it at 70°C for 12 hours, and then crush it through a 60-mesh sieve to obtain the fungus residue powder;

[0035] (2) Evenly mix the powder of fungus residue and 1.5mol / L NaOH at a solid-to-liquid ratio of 1:4, soak for 4 hours, then dry at 80°C for 12 hours, then place in a tube furnace, and heat at 10°C in a nitrogen atmosphere Heating at a rate of 1 / min to 850°C for 3 hours, cooling to room temperature under the protection of nitrogen after the reaction, obtaining a carbonized product and grinding it into powder with a mortar;

[0036] (3) Wash the carbonized product with 1mol / L HCl solution to neutrality, then alternately rinse with distilled water and absolute ethanol for 3 times, then dry at 80°C for 6 hours to obtain A; dissolve A, silver nitrate and ytterbium nitrate in 50mL In deionized water, set the shaker temperature to 25°C, shake at 120r / min for 1h, t...

Embodiment 2

[0040] The influence of embodiment 2 adsorption time:

[0041] Add 500mL ciprofloxacin waste water in the 500mL conical flask, its mass concentration is 20mg / L, then add the silver ytterbium modified biochar of 0.1g embodiment 1 in the conical flask, at 25 ℃, with plastic wrap After sealing, place it on a rotary oscillator to vibrate at a speed of 120r / min, and use a needle tube at 1, 3, 5, 10, 15, 20, 25, 30, 60, 90, 120, 180, 240, 300, and 360 min Samples were taken and filtered through a 0.22 μm filter membrane to obtain water samples. The concentration of ciprofloxacin in the water samples was measured using a UV-visible spectrophotometer. The experiment was repeated three times, and the data were recorded in figure 2 .

[0042] figure 2 is the effect of time on the adsorption capacity of silver-ytterbium-modified biochar. Depend on figure 2 It can be seen that the adsorption capacity of silver-ytterbium-modified biochar to ciprofloxacin first increased and then gra...

Embodiment 3

[0043] Embodiment 3 The influence of initial concentration of ciprofloxacin

[0044] Add 150mL of ciprofloxacin waste water to a 250mL Erlenmeyer flask, and its mass concentration is 20mg / L, 40mg / L, 60mg / L, 80mg / L, 100mg / L, 120mg / L, 140mg / L, 160mg / L , 180mg / L, 200mg / L, then add 0.02g of the silver-ytterbium modified biochar of Example 1 into the Erlenmeyer flask, seal it with a plastic wrap at 25°C and place it on a rotary shaker at a speed of 120r / min. Shake, take a sample with a needle tube at 12 hours, and filter through a 0.22 μm filter membrane to obtain a water sample. The concentration of ciprofloxacin in the water sample is measured by a UV-visible spectrophotometer. The experiment is repeated three times, and the data are recorded in image 3 .

[0045] image 3 is the effect of the initial concentration on the adsorption capacity of silver-ytterbium modified biochar, given by image 3 It can be seen that the adsorption capacity of silver-ytterbium-modified biochar...

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Abstract

The invention discloses a method for adsorbing antibiotics in water by using silver-ytterbium modified biochar, and belongs to the field of surface water treatment.The silver-ytterbium modified biochar is applied to removal of antibiotics in water, and the silver-ytterbium modified biochar is prepared by the following steps: soaking mushroom dreg powder with a sodium hydroxide solution, drying and then performing high-temperature pyrolysis in a tube furnace filled with nitrogen; grinding the carbonized product, cleaning with a hydrochloric acid solution, alternately flushing with distilled water and absolute ethyl alcohol, and drying to obtain A; and mixing the A with silver salt and ytterbium salt, shaking, drying the uniformly mixed solution, putting the solution into a tubular furnace filled with nitrogen for high-temperature pyrolysis, washing to remove impurities, and drying to obtain modified charcoal. The silver-ytterbium modified biochar has a porous structure, is stable in structure and performance, rich in pore structure and good in adsorbability, the silver-ytterbium modified biochar is applied to removal of antibiotics in water, the adsorption effect of the silver-ytterbium modified biochar on the antibiotics is good, and the way of controlling antibiotic pollution in water is broadened.

Description

technical field [0001] The invention belongs to the technical field of surface water treatment, and in particular relates to a method for using silver-ytterbium-modified biochar to adsorb antibiotics in water. Background technique [0002] Environmental pollution is related to human health and the development of human society. In recent years, with the rapid economic and social development, people's living standards have improved rapidly. It is undeniable that while the economy is developing rapidly, the problem of environmental pollution is becoming more and more serious. Among all kinds of environmental pollution problems, water pollution is attracting widespread attention from all walks of life because of its visibility. The problem of water pollution will affect the normal physiological activities of organisms, and if the water pollution is not controlled, it is likely to cause damage to the ecological balance and lead to more serious consequences. Among the many type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/20B01J20/0233B01J20/0207B01J20/28064B01J20/28073B01J20/28083C02F1/283B01J2220/4887C02F2101/34C02F2101/36C02F2101/38Y02W10/37
Inventor 吴烈善唐瑜鸿何时钘罗婷婷
Owner GUANGXI UNIV
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