Preparation method of pyridine-functionalized chitosan adsorbent

A technology for converting chitosan and adsorbent, which is applied in the field of preparation of pyridine functionalized chitosan adsorbent, can solve the problems of heavy metal or antibiotic limitation, inability to remove heavy metal and antibiotic simultaneously, low adsorption capacity, etc., and achieves low material cost. , the effect of improving adsorption capacity and broad application prospects

Inactive Publication Date: 2019-10-25
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method of biomass adsorbent disclosed in the above patents or documents can only adsorb single heavy metals or antibiotics, and cannot simultaneously remove heavy metals and antibiotics, and solve the problem of selective and synergistic adsorption of heavy metals and antibiotics, which makes it possible to treat complex pollutants in water bodies. heavy metals or antibiotics are restricted
[0004] In view of the low adsorption capacity of existing biomass adsorbents for heavy metals in high-acid and high-salt environments, and the inability to simultaneously remove heavy metals and antibiotics, to solve the problem of selective and synergistic adsorption of heavy metals and antibiotics, the present invention provides a pyridine functionalized chitosan The preparation method of adsorbent

Method used

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  • Preparation method of pyridine-functionalized chitosan adsorbent

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Effect test

Embodiment 1

[0018] A kind of preparation method of pyridine functionalized chitosan adsorbent proposed by the present embodiment comprises the following steps:

[0019] S1: 0.1 g of polyethyleneimine with a mass concentration of 5-100 g / L, 0.05 g of 2-chloromethylpyridine hydrochloride with a mass concentration of 2.5-100 g / L and 0.2 g of a mass concentration of 10-100 g / L Dissolve g / L sodium carbonate in an aqueous solution of 1 ml ethanol and 5 ml distilled water, set the dissolving temperature to 85 °C, and set the dissolving time to 2 h, and at the same time use magnetic force in an 85 °C oil bath to stir until it is evenly stirred, then Use the cooling device for cooling operation. The cooling device first cools at a rate of 3-5°C / min until it cools down to 30°C. The cooling device then cools at a rate of 0.3-0.5°C / min until it cools to room temperature, and then Use a centrifugal device and a filter sieve to perform centrifugation and filtration in sequence, and finally spin-dry in ...

Embodiment 2

[0025] A kind of preparation method of pyridine functionalized chitosan adsorbent proposed by the present embodiment comprises the following steps:

[0026]S1: 0.2g of polyethyleneimine with a mass concentration of 5-100 g / L, 0.05g of 2-chloromethylpyridine hydrochloride with a mass concentration of 2.5-100 g / L and 0.2g of a mass concentration of 10-100 Dissolve g / L sodium carbonate in an aqueous solution of 1 ml ethanol and 5 ml distilled water, set the dissolving temperature to 85 °C, and set the dissolving time to 2 h, and at the same time use magnetic force in an 85 °C oil bath to stir until it is evenly stirred, then Use the cooling device for cooling operation. The cooling device first cools at a rate of 3-5°C / min until it cools down to 30°C. The cooling device then cools at a rate of 0.3-0.5°C / min until it cools to room temperature, and then Use a centrifugal device and a filter sieve to perform centrifugation and filtration in sequence, and finally spin-dry in a rotary...

Embodiment 3

[0032] A kind of preparation method of pyridine functionalized chitosan adsorbent proposed by the present embodiment comprises the following steps:

[0033] S1: 0.7g of polyethyleneimine with a mass concentration of 5-100 g / L, 0.25g of 2-chloromethylpyridine hydrochloride with a mass concentration of 2.5-100 g / L and 0.3231g of a mass concentration of 10-100 g / L Dissolve g / L sodium carbonate in an aqueous solution of 15 ml ethanol and 5 ml distilled water, set the dissolving temperature to 85 °C, and set the dissolving time to 2 h, and at the same time use magnetic force in an 85 °C oil bath to stir until it is evenly stirred, then Use the cooling device for cooling operation. The cooling device first cools at a rate of 3-5°C / min until it cools down to 30°C. The cooling device then cools at a rate of 0.3-0.5°C / min until it cools to room temperature, and then Use a centrifugal device and a filter sieve to perform centrifugation and filtration in sequence, and finally spin-dry in...

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Abstract

The invention discloses a preparation method of a pyridine-functionalized chitosan adsorbent. The preparation method includes the following steps that S1, polyethyleneimine with the mass concentrationbeing 5-100g / L, 2-picolyl chloride hydrochloride with the mass concentration being 2.5-100g / L, and sodium carbonate with the mass concentration being 10-100g / L are dissolved in an aqueous solution ofethyl alcohol with the volume concentration being 5-80%. According to the preparation method of the pyridine-functionalized chitosan adsorbent, the pyridine-functionalized chitosan adsorbent can be applied to the fields such as simultaneous removal of heavy metal and antibiotics in livestock and poultry breeding wastewater under a wide pH range, the technical problems such as small adsorption capacity and slow adsorption rate in collaboratively adsorbing the heavy metal and the antibiotics, large resin demand in engineering, long operation time, small adsorption capacity or even no adsorptionunder strong acid conditions and the like are solved, and economic and environmental benefits are remarkable.

Description

technical field [0001] The invention relates to the field of modified resin synthesis, in particular to a preparation method of a pyridine functionalized chitosan adsorbent. Background technique [0002] In order to promote animal growth, improve feed efficiency, and treat and control diseases, veterinary antibiotics and trace heavy metal elements have been widely used in intensive livestock and poultry farming. Heavy metals often mix and coexist in soil and water, which pose a huge potential hazard to the environment and human health. The common treatment method for livestock and poultry wastewater is biochemical method, but the heavy metals and antibiotics are difficult to remove. The removal methods for complex pollutants of heavy metals and antibiotics at home and abroad include membrane filtration method, catalytic redox method, ion exchange and adsorption method, phytoremediation technology or combined process. The removal of pollutants in water based on the principl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24C02F1/28C08J9/28C08J9/26C08J3/24B01J20/30C02F101/34C02F101/20C08L5/08C08L79/02
CPCB01J20/24C02F1/286C02F2101/20C02F2101/34C02F2101/40C08J3/246C08J9/26C08J9/28C08J2305/08C08J2379/02C08J2405/08C08J2479/02
Inventor 张小朋王丽丽杨倩莹高冉薇张大帅史载锋
Owner HAINAN NORMAL UNIV
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