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Method for producing adsorbent used for removing barmful metals ions from apple juice

A technology for adsorption and separation materials and metal ions, which is applied in the field of preparation of adsorption and separation materials for removing harmful metal ions in apple juice, and can solve the problems that harmful metal ions cannot be removed, harmful metal ions cannot be removed, and the color of apple juice is turbid.

Inactive Publication Date: 2009-07-15
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the substantial increase in the output of apple juice concentrate, the competition in the international trade market is becoming increasingly fierce, and the requirements for product quality are getting higher and higher. However, due to the influence of the geographical environment of apple growth, apples often contain a certain amount of harmful metal ions. Due to the limitation of apple juice production and processing equipment, harmful metal ions cannot be removed, resulting in cloudy color of apple juice, which cannot meet food safety and physical and chemical standards, which directly affects the export of apple juice in my country and its competitiveness in the international trade market. Therefore, Choosing an effective method for removing harmful metal ions is one of the important ways to ensure the quality of fruit juice
[0003] At present, the commonly used adsorption materials are mainly adsorption resins, whose main purpose of adsorption is decolorization. The adsorption equipment generally adopts fixed bed, which belongs to intermittent operation and has low utilization efficiency.
Compared with the adsorption resin, the adsorption fiber has the advantages of fast adsorption speed, large adsorption capacity, good selectivity, easy elution, easy regeneration, etc., and has begun to be used in the recovery, concentration, enrichment and separation of metal ions from wastewater solutions. The application research in it is still in its infancy. The paper "Application of Ion Exchange Fiber in the Decolorization of Sugarcane Juice by Carbon Method" published in "Food and Fermentation Industry" (2004, 30(7): 12-16) has a good effect on the adsorption of sugarcane syrup The decolorization technology has been publicly reported, but this technology cannot remove harmful metal ions, especially the use of fiber adsorption materials to remove harmful metal ions in apple juice is still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0008] a. Non-woven cleaning

[0009] a.1 First, soak the polypropylene non-woven fabric with analytical pure acetone to remove oil stains,

[0010] a.2 Rinse with distilled water for 3-5 times,

[0011] a.3 Dry at 50-55°C;

[0012] b. Monomer solution immersion

[0013] b.1 Divide the fiber material into areas of different sizes according to the needs, soak it in 30%-40% monomer aqueous solution,

[0014] b.2 Cover it with plastic wrap to reduce volatilization;

[0015] c. Irradiation grafting

[0016] c.1 Directly irradiate the soaked fiber material with an electron accelerator in the air,

[0017] c.1.1 Energy 0.8-2.0 Mev,

[0018] c.1.2 Current 0.1-4mA,

[0019] c.1.3 Radiation dose 120-200KGy,

[0020] c.2 Stop irradiation when the required dose is reached;

[0021] d. Washing and drying

[0022] d.1 Wash the irradiated fiber material alternately with dilute hydrochloric acid and sodium hydroxide solutions with a solution concentration of 0.05-0.5mmol / L until th...

specific Embodiment approach

[0026] a. Non-woven cleaning

[0027] a.1 First, soak the polypropylene non-woven fabric with analytical pure acetone to remove oil stains,

[0028] a.2 Rinse with distilled water 5 times,

[0029] a.3 Dry at 55°C;

[0030] b. Monomer solution immersion

[0031] b.1 Divide the fiber material into areas of different sizes according to the needs, soak it in 40% acrylic acid aqueous solution,

[0032] b.2 Cover it with plastic wrap to reduce volatilization;

[0033] c. Irradiation grafting

[0034] c.1 Directly irradiate the soaked fiber material with an electron accelerator in the air,

[0035] c.1.1 Energy 1.0 Mev,

[0036] c.1.2 Current 0.2mA,

[0037] c.1.3 Radiation dose 200KGy,

[0038] c.2 Stop irradiation when the required dose is reached;

[0039] d. Washing and drying

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PUM

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Abstract

The invention discloses a preparation method of an adsorption separation material used for removing harmful metal ions in apple juice. The adsorption material commonly used at present is adsorption resin, and its adsorption purpose is mainly to decolorize, and harmful metal ions cannot be removed. The material prepared by the present invention is a kind of fiber adsorption material, and its main operation steps are as follows: select polypropylene non-woven fabric to wash and dry dry, and then put it into the monomer solution to soak it, and co-irradiate electron beams in the air for grafting, and alternately wash it with hydrochloric acid and sodium hydroxide dilute solution to wash off the monomer and the homopolymer of the monomer. The invention has good adsorption and separation performance for harmful metal ions in apple juice. After adsorption and separation, Cu2+≤5ppm, Pb2+≤0.2ppm, and As3+≤0.1ppm in apple juice can fully meet the quality standard requirements of concentrated apple juice and can effectively remove apples. Harmful metal ions in the juice can be eliminated, the quality of apple juice can be improved, and it can meet food hygiene safety and physical and chemical standards.

Description

technical field [0001] The invention relates to a metal ion adsorption and separation material, in particular to a preparation method of the adsorption and separation material used for removing harmful metal ions in apple juice. Background technique [0002] Apple Juice Concentrate (AJC) refers to the product obtained directly from fresh apples by pressing or other mechanical methods, and then removing a certain proportion of water by physical separation process without adding any foreign substances. At present, the production and export volume of concentrated apple juice in my country rank first in the world, and the export volume accounts for about half of the world's total trade volume, which has an important position in the international market. With the substantial increase in the output of apple juice concentrate, the competition in the international trade market is becoming increasingly fierce, and the requirements for product quality are getting higher and higher. Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/28A23L2/80A23L2/02
Inventor 仇农学耿建暖赵雁武常玉华赵武奇庞福科刘海英张峰李佩艳王宏
Owner SHAANXI NORMAL UNIV
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