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Method for preparing loofah sponge immobilized ionic liquid adsorbent

The technology of ionic liquid and loofah is applied in the field of preparation of biological adsorbents and achieves the effects of large adsorption capacity, fast adsorption speed and good desorption performance.

Inactive Publication Date: 2014-07-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation and adsorption of loaded ionic liquids have been reported. Wang Ruonan et al. studied the preparation of imidazole-loaded ionic liquid silica gel absorbent materials (Wang Ruonan et al., Preparation and application of imidazole-loaded ionic liquid silica gel absorbent materials, China Environmental Monitoring, 2013, 29 (2 ): 69~72); Peng Changhong and others studied the adsorption and removal of arsenic by ionic liquid-supported carbon nanotubes (; Peng Changhong's study on the adsorption and removal of arsenic by ionic liquid-supported carbon nanotubes, Journal of Central South University (Natural Science Edition), 2010, 41 (2 ): 416~421), but the immobilization of ionic liquids on loofah has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 10-mesh sieve to obtain pretreated loofah network;

[0023] (2) Oxidation of loofah: Add 1.0 g of sodium hydroxide and 70 mL of deionized water to the reactor, stir to dissolve, cool to room temperature, add 18 mL of 30% hydrogen peroxide, mix well, then add 12 g of pretreated loofah, bring to room temperature Soak for 28 hours, boil for 20 minutes, wash with deionized water until neutral after cooling, filter with suction, and dry at 85°C to obtain oxidized loofah;

[0024] (3) Preparation of loofah immobilized ionic liquid adsorbent: In the reactor, add 40mL epichlorohydrin and 15g oxidized loofah respectively, keep stirring at 70°C, and react for 60min. After cooling, add 4mL homobenzene Tetraformic dianhydride and 3g N-ethyl-picoline bromide ionic liquid, keep the te...

Embodiment 2

[0026](1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 20-mesh sieve to obtain pretreated loofah network;

[0027] (2) Oxidized loofah: In the reactor, add 0.6g sodium hydroxide and 62mL deionized water respectively, stir to dissolve, cool to room temperature, add 22mL30% hydrogen peroxide, mix well, then add 15g pretreated loofah, leave at room temperature Soak for 30 hours, boil for 20 minutes, wash with deionized water until neutral after cooling, filter with suction, and dry at 90°C to obtain oxidized loofah;

[0028] (3) Preparation of ionic liquid adsorbent immobilized on loofah: In the reactor, add 55mL epichlorohydrin and 18g oxidized loofah respectively, keep stirring at 75°C, and react for 50min. After cooling, add 5mL homobenzene Tetraformic dianhydride and 2g N-ethyl-picoline bromide ionic liquid, keep the tempera...

Embodiment 3

[0030] (1) Loofah pretreatment: Loofah comes from the fruit of loofah, which is obtained by peeling and removing the core. Cut the loofah into small pieces, wash with water, dry and crush, and sieve through a 10-mesh sieve to obtain pretreated loofah network;

[0031] (2) Oxidation of loofah: Add 1.5 g of sodium hydroxide and 78 mL of deionized water to the reactor, stir to dissolve, cool to room temperature, add 12 mL of 30% hydrogen peroxide, mix well, then add 8 g of pretreated loofah, and bring to room temperature Soak for 24 hours, boil for 30 minutes, wash with deionized water until neutral after cooling, filter with suction, and dry at 80°C to obtain oxidized loofah;

[0032] (3) Preparation of loofah immobilized ionic liquid adsorbent: In the reactor, add 25mL epichlorohydrin and 8g oxidized loofah respectively, keep stirring at 80°C for 40min, and after cooling, add 2mL homobenzene Tetraformic dianhydride and 1g N-ethyl-picoline bromide ionic liquid, keep the tempera...

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Abstract

The invention discloses a method for preparing a loofah sponge immobilized ionic liquid adsorbent and application techniques of the adsorbent. The method is characterized by comprising the following steps: removing peels and kernels of a mature loofah fruit, washing by water to remove soil and impurities, drying, smashing, treating the smashed loofah sponge by sodium hydroxide and hydrogen peroxide, drying to obtain an oxidized loofah sponge, adding 62%-72% of epoxy chloropropane and 15%-28% of oxidized loofah sponge in percentage by mass into a reactor, stirring and reacting at the constant temperature of 70-80 DEG C for 40-60 minutes, cooling, adding 4%-10% of pyromellitic dianhydride and 2%-6% of N-ethyl-3methylpyridine bromate ionic liquid, stirring and reacting for 48-60 hours at the constant temperature of 33-37 DEG C, cooling, carrying out suction filtration, washing by deionized water till filtrate is neutral, washing by a little ethyl alcohol and drying in a vacuum drying oven at the temperature of 50 DEG C to obtain the loofah sponge immobilized ionic liquid adsorbent. The adsorbent has the advantages of very high arsenic adsorption capacity, excellent physicochemical and mechanical properties, strong regeneration capacity, high frequency of repeated use, low cost and environmental protection.

Description

technical field [0001] The invention relates to the technical field of a preparation method of a biological adsorbent, in particular to a preparation method of a luffa fruit immobilized ionic liquid adsorbent and an application technology for arsenic adsorption in water. Background technique [0002] Ionic liquids are generally composed of specific organic cations (such as imidazole, pyridine) with relatively large volume and asymmetric structure and relatively small inorganic anions (such as Cl - 、Br - etc.) composed of substances that are liquid at or near room temperature. Room temperature ionic liquid is an excellent solvent, which can dissolve polar and non-polar organic and inorganic substances, is easy to separate, and can be recycled. It has a wide liquid range, no vapor pressure, no volatilization, and no environmental pollution. It is known as a green solvent. [0003] Immobilizing the ionic liquid can obtain the loaded ionic liquid or a solid material with an i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/62
Inventor 李慧芝许崇娟庄海燕
Owner UNIV OF JINAN
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