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A preparation method of nanocrystalline cellulose magnetic particles adsorbing heavy metal ions

A technology for nanocrystalline cellulose and heavy metal adsorption, which is applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of heavy metal ions exceeding the standard, achieve good effect, low cost, and adsorption The effect of large capacity

Active Publication Date: 2021-01-15
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of nanocrystalline cellulose magnetic particles for adsorbing heavy metals in seafood soy sauce to solve the defect that heavy metal ions exceed the standard after the existing seafood soy sauce is produced

Method used

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  • A preparation method of nanocrystalline cellulose magnetic particles adsorbing heavy metal ions

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Embodiment 1

[0021] A preparation method for nanocrystalline cellulose magnetic particles adsorbing heavy metal ions, comprising the following steps:

[0022] The preparation method of microcrystalline cellulose is to use sycamore sawdust as raw material, cook with distilled water at 95°C for 2 hours, then dry at 120°C for 10 hours, pulverize through a 200-mesh sieve, wash twice, and then dry at 140°C to obtain lignocellulose. Then mix 1g lignocellulose with a solid-liquid ratio: 35mL of 1.2mol / L hydrochloric acid, heat up to 60°C for 1h, and then filter with suction at an ultrasonic frequency of 55KHz. , the obtained filter residue is dried to a water content of 5%, and then discharged and pulverized to obtain microcrystalline cellulose;

[0023] The preparation method of nanocrystalline cellulose is to add microcrystalline cellulose and strongly acidic cation exchange resin to 1000mL deionized water at a mass ratio of 1:15, stir at 65°C, and ultrasonically treat for 1h at an ultrasonic f...

Embodiment 2

[0026] A preparation method for nanocrystalline cellulose magnetic particles adsorbing heavy metal ions, comprising the following steps:

[0027] The preparation method of microcrystalline cellulose is to use sycamore sawdust as raw material, cook it with distilled water at 98°C for 3 hours, then dry it at 135°C for 11 hours, crush it through a 250 mesh sieve, wash it three times, and dry it at 150°C to obtain lignocellulose. Then mix 1g lignocellulose with a solid-liquid ratio: 40mL of 1.3mol / L hydrochloric acid, heat up to 65°C and ultrasonically treat for 1.2h, then filter with suction, wash the filter residue to neutral, soak it with 95wt% ethanol for 2.5h, and then filter to obtain The filter residue was dried to a water content of 8%, and then discharged and pulverized to obtain microcrystalline cellulose;

[0028]The preparation method of nanocrystalline cellulose is to add microcrystalline cellulose and strongly acidic cation exchange resin into 1000mL deionized water ...

Embodiment 3

[0031] A preparation method for nanocrystalline cellulose magnetic particles adsorbing heavy metal ions, comprising the following steps:

[0032] The preparation method of microcrystalline cellulose is to use sycamore wood chips or willow wood chips as raw materials, cook them with distilled water at 100°C for 4 hours, then dry them at 155°C for 12 hours, crush them through a 300-mesh sieve, wash them three times, and dry them at 160°C to obtain woody cellulose. Cellulose, then mix 1g lignocellulose with 50mL of 1.5mol / L hydrochloric acid at a material-to-liquid ratio, raise the temperature to 70°C and ultrasonically treat for 1.5h, then filter with suction, wash the filter residue until it is neutral, soak it in 98wt% ethanol for 3h, and then filter , the obtained filter residue is dried to a water content of 10%, and then discharged and pulverized to obtain microcrystalline cellulose;

[0033] The preparation method of nanocrystalline cellulose is to add microcrystalline cel...

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Abstract

The invention provides a preparation method for a nanocrystalline cellulose magnetic particle capable of adsorbing heavy metal ions. According to the invention, platane wood or willow is used as a raw material to prepare microcrystalline cellulose; then nanocrystalline cellulose is prepared; and finally, the nanocrystalline cellulose magnetic particles are prepared through graft modification. The preparation method has the characteristics of easy availability of raw materials and low cost; and the prepared adsorbent, i.e., the nanocrystalline cellulose magnetic particle, is green, environment friendly and free of pollution, can be used for adsorbing a plurality of heavy metals like lead, chromium and copper in seafood sauce and has great adsorption capacity, good effect and regeneration ability.

Description

technical field [0001] The invention relates to the field of nanocrystalline cellulose composite materials, in particular to a method for preparing nanocrystalline cellulose magnetic particles for adsorbing heavy metal ions in seafood soy sauce. Background technique [0002] With the development of modern economy and the development and utilization of marine resources in the offshore area, a large amount of waste water and domestic sewage containing heavy metal ions are discharged into the sea, the heavy metal pollution in marine water has increased sharply, and the ecological environment has also suffered great damage. Heavy metal ions can be enriched and accumulated through the food chain. A large number of studies have shown that the heavy metal content of fish in seawater has seriously exceeded the standard. [0003] Seafood soy sauce is made of super light soy sauce as the main ingredient, together with the essence of sea fish and shrimp refined by modern technology, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28A23L5/20
CPCA23V2002/00B01J20/24B01J20/28009B01J2220/4825A23V2250/51084
Inventor 欧阳小琨金如娜杨立业王阳光
Owner ZHEJIANG OCEAN UNIV
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