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Biological adsorbing agent with adsorption capacity of heavy metal ion, and producing method and application thereof

A technology of heavy metal ions and biological adsorbents, which is applied in the direction of adsorption of water/sewage treatment, other chemical processes, chemical instruments and methods, etc., can solve problems such as refractory degradation, secondary pollution, research literature and patent reports that have not been seen, and achieve Effects of high specific surface area and mechanical strength, good adsorption capacity, and good solvency

Active Publication Date: 2008-10-01
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: chitin has high crystallinity, chitosan is easy to dissolve at higher acidity, chitin and chitosan powder are difficult to recycle, and cellulose has low mechanical strength, which is not conducive to the adsorption of heavy metal ions. In view of these problems, the current research Polymer materials are often used to glue and blend chitin or chitosan, but the glue and blended polymers used are difficult to degrade under natural conditions, which will inevitably cause secondary pollution to the environment
Combined with the characteristics of ionic liquids that can dissolve cellulose, chitin, chitosan and other biopolymers, the present invention studies the application of this process in the preparation of related biosorbents. At present, there are no literature and patent reports on the relevant research

Method used

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  • Biological adsorbing agent with adsorption capacity of heavy metal ion, and producing method and application thereof
  • Biological adsorbing agent with adsorption capacity of heavy metal ion, and producing method and application thereof
  • Biological adsorbing agent with adsorption capacity of heavy metal ion, and producing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: Preparation by drying method: chitin / cellulose adsorbent

[0036] Chitin and microcrystalline cellulose were dried in a vacuum desiccator at 70 °C for 24 hours. Under the microwave heating condition of P-3 power, chitin and microcrystalline cellulose with a mass ratio of 1:2 were dissolved in [Bmim][Cl ]middle. The resulting viscous, clear solution with a mass percentage of 6% was squeezed into beads in a water bath through a 1.6 mm syringe needle. Then the chitin / cellulose adsorbent was rinsed 5 times with deionized water. Determination of [Bmim] in the aqueous phase with a UV spectrophotometer at 211nm + , OK[Bmim] + It has all been washed. The obtained chitin / cellulose adsorbent was dried in an oven at 70°C for later use.

Embodiment 2

[0037] Example 2: Preparation by drying method: protonated chitin / cellulose adsorbent

[0038] Protonated chitin (chitin was soaked in 1 mol / L hydrochloric acid for 5 hours, washed with water until neutral, and dried in vacuum at 40°C for 24 hours) and microcrystalline cellulose were dried in a vacuum dryer at 70°C for 24 hours. Under the microwave heating condition of P-3 power, protonated chitin and microcrystalline cellulose with a mass ratio of 1:2 were dissolved in [Bmim] successively for 35 times (10S each time) and 25 times (8S each time). [Cl]. The resulting viscous, clear solution with a mass percentage of 6% was squeezed into beads in a water bath through a 1.6 mm syringe needle. The protonated chitin / cellulose adsorbent was then rinsed 5 times with deionized water. Determination of [Bmim] in the aqueous phase with a UV spectrophotometer at 211nm + , OK [Bmim] + It has all been washed. The obtained protonated chitin / cellulose adsorbent was dried in an oven at 70...

Embodiment 3

[0039] Embodiment 3: drying method preparation: chitosan / cellulose adsorbent

[0040] Chitosan and microcrystalline cellulose were dried in a vacuum desiccator at 70 °C for 24 hours. Under the microwave heating condition of P-3 power, chitin and microcrystalline cellulose with a mass ratio of 1:2 were dissolved in [Bmim][ Cl]. The resulting viscous, clear solution with a mass percentage of 6% was squeezed into beads in a water bath through a 1.6 mm syringe needle. The chitosan / cellulose adsorbent was then rinsed 5 times with deionized water. Determination of [Bmim] in the aqueous phase with a UV spectrophotometer at 211nm + , OK[Bmim] + It has all been washed. The obtained chitosan / cellulose adsorbent was freeze-dried in a lyophilizer, and then placed in an oven at 70° C. for subsequent use.

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Abstract

The invention relates to a biology adsorbent and a preparation method thereof as well as application of the preparation method in heavy metal ion adsorption. The biology adsorbent is characterized in that hybrid blending material which has heavy metal ion adsorption capability is prepared by the capability of biological polymer such as microcrystalline cellulose, chitin, chitosan, etc. which can be dissolved in ionic liquid; the ionic liquid is chloridized 1-butyl-3-methyl imidazole salt and chloridized 1-allyl-3-methyl imidazole salt; the preparation of the adsorbent adopts two types: a drying type and a freeze-drying type; the ionic liquid used in the method can be recovered; the prepared adsorbent can be automatically degraded in environment; the preparation method and the prepared adsorbent in the method cause no secondary environmental pollution.

Description

technical field [0001] The invention relates to a biosorbent, its preparation method and its application in the adsorption of heavy metal ions. technical background [0002] Cellulose is the most abundant renewable resource in nature. Through photosynthesis, 1000×10 cellulose can be produced on the earth every year. 10 Ton. Among the natural organic compounds existing on the earth, the largest amount is cellulose, followed by chitin. The former is mainly produced by plants, while the latter is mainly produced by animals. It is estimated that the annual biosynthesis of chitin in nature is nearly 10 billion tons. With the rise of green chemistry research and the need to build a conservation-minded society, cellulose and chitin, as a class of renewable resources, have attracted increasing attention. Cellulose is a polyhydroxyglucose compound, which contains many hydrophilic hydroxyl groups in its molecule. It is a fibrous, multi-capillary high molecular polymer with the char...

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 陈继孙晓琦彭波
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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