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Heavy metal composite adsorption material, preparation method and application thereof

A technology of composite adsorption material and heavy metal, applied in the field of biochemical industry, can solve problems such as increase of metal substances, and achieve the effects of high adsorption activity, simple preparation method and low price

Active Publication Date: 2019-10-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the rapid development of industry, the use of heavy metals has increased, but their unrestricted discharge has led to an increase in metal substances in the environment

Method used

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  • Heavy metal composite adsorption material, preparation method and application thereof
  • Heavy metal composite adsorption material, preparation method and application thereof
  • Heavy metal composite adsorption material, preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0020] The invention provides a method for preparing a heavy metal composite adsorption material, which is mainly used for synthesizing a β-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel capable of removing heavy metal ions in sewage. The specific preparation steps are as follows: 1.5g of β-cyclodextrin was dissolved in a 10mol / L solution containing 1.0g of sodium hydroxide, and 1.0g of artificial zeolite was added and stirred for 1h, and then 6.3g of acrylic acid monomer and 0.18g of N,N'-methylene The mixed solution of bisacrylamide, after stirring evenly, react in a water bath at 50°C for 1 hour, then add 0.02g of potassium persulfate and stir evenly, react in a water bath at 50-70°C for 2-3 hours, after the polymerization reaction is completed, the water coagulation After the glue was chopped, it was dried in a freeze dryer for 24 hours, and then stored in an oven at 50°C.

[0021] Microstructural and chemical studies of β-cyclodextrin / acrylic acid / artific...

Embodiment 1

[0029] 10mg of dried β-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel was put into different pH and 500mg / L uranyl ion solutions for adsorption study. Arsenazo III was used as a complexing agent, and its concentration was measured with a UV spectrophotometer at a wavelength of 650nm.

[0030] ,

[0031] Among them, q e represents the adsorption capacity, c e and c 0 Represent the equilibrium and initial concentrations, respectively, m represents the mass of the adsorbed material, and V represents the volume of the adsorbed solution.

[0032] Such as Figure 6 As shown, the adsorption capacity of β-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel to uranyl ions gradually increased as the pH value increased from 2 to 3.5. When the pH value increased to 4.5, the adsorption amount of uranyl ion remained almost constant and reached equilibrium, and when the pH value was greater than 4.5, the adsorption amount of uranyl ion decreased rapidly. ...

Embodiment 2

[0034] The operation was carried out according to the method of Example 1, and the influence of 20 mL uranyl ion solutions with different initial concentrations on the adsorption process was studied under the conditions of pH 4.0-4.5 and temperature 25°C.

[0035] Such as Figure 7 It is shown that when the initial concentration is greater than 800 mg / L, the adsorption capacity of β-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel to uranyl ions can reach the maximum value, which is 797.37 mg / g, which is higher than that of β-cyclodextrin Acrylic / acrylic acid, which proved to be effective in removing uranyl ions from solution.

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Abstract

The invention discloses a novel heavy metal composite adsorption material and a preparation method thereof. The heavy metal composite adsorption material is beta-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel which takes beta-cyclodextrin and acrylic monomer as raw materials, artificial zeolite as a filler, N,N'-methylene bisacrylamide as a cross-linking agent, and potassium persulfate as an initiator. According to the composite hydrogel, uranium and other heavy metal ions can be effectively adsorbed, the purpose of reasonable sewage treatment is achieved, the synthetic process of the composite hydrogen is simple, the cost of the raw materials is low, adsorption operational steps are simple, wide application prospects are provided, and requirement of the speed-developmentsewage treatment can be met.

Description

technical field [0001] The invention relates to the field of biochemical industry, in particular to the preparation of a β-cyclodextrin / acrylic acid / artificial zeolite composite hydrogel and its application in absorbing heavy metals. Background technique [0002] In recent years, with the rapid development of industry, the use of heavy metals has increased, but their unrestricted discharge has led to an increase in metal substances in the environment. Uranium is currently the main fuel for most commercial reactors. A large amount of wastewater containing radioactive uranium is discharged into the environment, which will pose long-term threats to humans and the environment. Therefore, the removal and recovery of uranium from wastewater has become an extremely urgent problem. [0003] At present, various technologies such as ion exchange, solvent extraction, reverse osmosis, membrane filtration and chemical precipitation have been used to remove uranium from aqueous solutions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/264B01J20/28047B01J20/3028C02F1/288C02F2101/20
Inventor 欧敏锐张子惠许小平
Owner FUZHOU UNIV