Kapok fiber adsorbent, preparation method and application thereof

A kapok fiber and adsorbent technology, which is applied in the field of kapok fiber adsorbent and its preparation, can solve problems affecting the development of the nervous system, damage to the brain and optic nerves, bone pain, etc., and achieve easy desorption, regeneration, use, and modification effects Good, high resorption effect

Active Publication Date: 2013-02-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, excessive intake of lead ions by children will affect the development of the nervous system; long-term intake of water polluted by cadmium sulfate will cause chronic cadmium poisoning and lead to bone pain; extremely destructive

Method used

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  • Kapok fiber adsorbent, preparation method and application thereof
  • Kapok fiber adsorbent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, preparation and application of kapok fiber adsorbent

[0022] Add 2.0 g of kapok fibers (50 μm in length and 95% hollowness) into 100 mL of dichloromethane for hydrophilic treatment, soak for 10 minutes and then filter. Wash three times, filter and dry naturally. Take 1.5 g of kapok fiber treated with hydrophilicity and add it into 100 mL of aqueous sodium hydroxide solution (5 mol / L), and stir at 30° C. for 12 hours. After filtration, the kapok fibers were washed with deionized water until the filtrate was neutral. Then wash with ethanol and acetone, and dry in an oven at 60°C to obtain alkalized kapok. Take 1.0 g of alkalized kapok and 4.4 g of DTPA, disperse them in 100 mL of anhydrous DMF, stir, raise the temperature to 75°C and react for 24 hours. Then filter, wash with DMF, deionized water, saturated sodium bicarbonate solution, deionized water, ethanol and acetone in sequence, and finally dry at 80° C. for 2 hours to obtain kapok fiber adsorbent....

Embodiment 2

[0027] Embodiment 2, preparation and application of kapok fiber adsorbent

[0028] Add 2.0g of kapok fiber (100μm in length, 89% hollowness) into 150mL of n-hexane for hydrophilic treatment, soak for 10 minutes and then filter. Wash three times, filter and dry naturally. Take 1.5 g of kapok fiber treated with hydrophilicity and add it into 100 mL of potassium hydroxide aqueous solution (3 mol / L), and stir at 20° C. for 24 hours. After filtration, the kapok fibers were washed with deionized water until the filtrate was neutral. Then wash with ethanol and acetone, and dry in an oven at 60°C to obtain alkalized kapok. Take 1.0 g of alkalized kapok and 3.5 g of DTPA, disperse them in 100 mL of anhydrous DMF, raise the temperature to 85° C., and react for 25 hours. Then filter, wash with DMF, deionized water, saturated sodium bicarbonate solution, deionized water, ethanol and acetone in sequence, and finally dry at 80° C. for 2 hours to obtain kapok fiber adsorbent.

[0029] Ta...

Embodiment 3

[0031]Embodiment 3, preparation and application of kapok fiber adsorbent

[0032] Add 2.0g kapok fiber (length 200, hollowness 93%) into 200mL ether for hydrophilic treatment, soak for 10 minutes and then filter. Wash three times, filter and dry naturally. Take 1.5 g of kapok fiber treated with hydrophilicity and add it into 100 mL of aqueous sodium hydroxide solution (2 mol / L), and stir at 25° C. for 20 hours. After filtration, the kapok was washed with deionized water until the filtrate was neutral. Then wash with ethanol and acetone, and dry in an oven at 60°C to obtain alkalized kapok. Take 1.0 g of alkalized kapok and 2.2 g of DTPA, disperse them in 100 mL of anhydrous DMF, raise the temperature to 65°C and react for 16 hours. Then filter, wash with DMF, deionized water, saturated sodium bicarbonate solution, deionized water, ethanol and acetone in sequence, and finally dry at 80° C. for 2 hours to obtain kapok fiber adsorbent.

[0033] Take 20 mg of the kapok fiber a...

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Abstract

The invention discloses a kapok fiber adsorbent, a preparation method and application thereof. The method comprises the following steps: (1) putting the kapok fiber in organic solvent to soak, then drying to obtain hydrophilously treated kapok fiber; (2) putting the hydrophilously treated kapok fiber in alkaline aqueous solution to implement alkaline treatment and obtain alkaline kapok fiber; and (3) reacting alkaline kapok fiber with a chelating agent to obtain the kapok fiber adsorbent instantly. The invention has the advantages of the adoption of kapok fiber having natural thin-wall hollow structure as raw material, great specific surface area and good modification effect. Compared with the prior art, the invention also has the advantages of fast absorption speed (the absorption balance for lead ion and cadmium ion can be reached in 2 minutes), high absorption capacity (the maximum absorption quantity of the lead ion can be reached 311mg/g, and the maximum absorption quantity of the cadmium ion can be reached 164mg/g), convenience for desorption and high re-adsorption quantity and is especially suitable for sewage treatment with high initial concentration.

Description

technical field [0001] The invention relates to a kapok fiber adsorbent, a preparation method and application thereof, and belongs to the field of preparing water treatment adsorption materials by modifying natural materials with chelating agents. Background technique [0002] With the discharge of industrial sewage and household wastewater, the pollution of heavy metal ions in water is becoming more and more serious. Excessive heavy metal ions in water not only affect the yield and quality of aquatic plants and animals, but also affect the health of animals and humans through the food chain. For example, excessive intake of lead ions by children will affect the development of the nervous system; long-term intake of water polluted by cadmium sulfate will cause chronic cadmium poisoning and lead to bone pain; Great damage. Based on the many hazards of heavy metal ions, the removal of heavy metal ions in water has become a very important aspect of water treatment. There are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 段春婷沈衡张小莉赵宁徐坚
Owner INST OF CHEM CHINESE ACAD OF SCI
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