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A preparation method of heavy metal extractant microcapsules and its application in heavy metal wastewater treatment

An extractant and microcapsule technology, which is applied in the field of heavy metal extractant preparation, can solve the problems of large differences in polarity and water solubility, difficulty in industrialization and mass production, and cumbersome technology, so as to maintain the integrity of the capsule and facilitate selectivity The effect of adsorption and desorption

Active Publication Date: 2017-10-24
HUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current microcapsule preparation technology is relatively cumbersome. In addition, there are many types of microcapsule extractants, and the polarity and water solubility are quite different. Therefore, the preparation of heavy metal extraction microcapsules by interfacial polymerization, suspension polymerization or solvent evaporation is difficult to achieve industrialization. and mass production

Method used

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  • A preparation method of heavy metal extractant microcapsules and its application in heavy metal wastewater treatment
  • A preparation method of heavy metal extractant microcapsules and its application in heavy metal wastewater treatment
  • A preparation method of heavy metal extractant microcapsules and its application in heavy metal wastewater treatment

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Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 adopts the following steps to realize the present invention:

[0034] 1. Preparation of extractant microcapsules:

[0035] (1) Preparation of hollow capsules: Take 5g methyl methacrylate, 10g methacrylic acid, 1g tetraethylene glycol dimethacrylate, 0.5g trimethylolpropane trimethacrylate, 0.5g 1-hydroxycyclohexyl For phenyl ketone, the above-mentioned components were stirred evenly, and then slowly added dropwise under stirring to a solution in which 3 g of styrene-maleic anhydride copolymer sodium salt was dissolved in advance, and homogeneously emulsified to obtain an emulsion, and then ultrasonically Ultrasonic cavitation of the emulsion with a frequency of 20KHz for 20 minutes, under stirring, use a UV lamp with a power of 2000w, with a distance of 20cm from the liquid surface, and react with UV light for 15 minutes. After the reaction is completed, add a large amount of water to the suspension obtained from the reaction, and rinse repeatedly Hollow c...

Embodiment 2

[0038] Embodiment 2 adopts the following steps to realize the present invention:

[0039] 1. Preparation of extractant microcapsules:

[0040] (1) Preparation of hollow capsules: Take 3g of styrene, 10g of sodium methacrylate hydroxypropylsulfonate, 1.5g of hexanediol dimethacrylate, 0.3g of pentaerythritol triacrylate, and 0.6g of azobisisobutyronitrile, Stir the above-mentioned components evenly, then slowly drop them into the solution dissolved with 3g of sodium dodecylbenzenesulfonate under stirring, then perform ultrasonic cavitation on the emulsion at an ultrasonic frequency of 40KHz for 10 minutes, and raise the temperature of the above-mentioned emulsion to 75 o C, stirring and reacting for 2 hours, after the reaction is over, add a large amount of water to the suspension obtained by the reaction, repeatedly rinse the hollow capsule particles in the suspension, then collect the floating particles in the upper layer, and dry them in vacuum to obtain hollow microcapsules...

Embodiment 3

[0043] Embodiment 3 adopts the following steps to realize the present invention:

[0044] 1. Preparation of extractant microcapsules:

[0045] (1) Preparation of hollow capsules: Take 3g styrene, 3g methyl methacrylate, 5g methacrylic acid, 5g acrylamide, 1g neopentyl glycol diacrylate, 0.6g trimethylolpropane trimethacrylate, 0.5g of 1-hydroxycyclohexyl phenyl ketone, stir the above-mentioned components evenly, then slowly add dropwise to the solution with 3g of styrene-maleic anhydride copolymer sodium salt under stirring, and then conduct the emulsification of the emulsion with an ultrasonic frequency of 80KHz Ultrasonic cavitation for 10 minutes, under stirring, use a UV lamp with a power of 1000w, with a distance of 30cm from the liquid surface, and react with UV light for 20 minutes. After the reaction is completed, add a large amount of water to the suspension obtained from the reaction, and rinse the hollow capsules in the suspension repeatedly. Particles, then collec...

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Abstract

The invention discloses a heavy metal extractant microcapsule and application thereof. The heavy metal extractant microcapsule of the present invention is composed of a hollow capsule and a heavy metal extractant wrapped by the hollow capsule. The microcapsule is first composed of 2-10 parts of a monofunctional monomer, 5-15 parts of a functional polymerizable monomer, 0.1-3 parts of joint agent, 0.1-2 parts of photoinitiator or thermal initiator, 0.1-3 parts of emulsifier, 100 parts of water, after emulsification, ultrasonic cavitation, curing into film, rinsing and drying to make hollow capsules, and then The heavy metal extractant is diffused and infiltrated into the hollow capsule by using pressure difference and concentration gradient. The present invention uses ultrasonic cavitation and the bubbles released by the initiator as a template to form hollow capsules through homogeneous emulsification. The preparation method saves time and effort and can better maintain the integrity of the capsules; the extractant microcapsules of the present invention can be applied Selective adsorption or desorption of heavy metal ions in water treatment, flexible application mode and wide application range.

Description

technical field [0001] The invention relates to a preparation method and application of a heavy metal extractant, in particular to a preparation method of a heavy metal extractant microcapsule and its application in heavy metal wastewater treatment. Background technique [0002] With the rapid development of the economy, especially the human activities in mining, metallurgy, chemical industry and other industries, the pollution of heavy metal water bodies is becoming more and more serious. Heavy metals (mainly mercury (Hg), cadmium (Cd), lead (Pb), chromium (cr), arsenic (As), copper (Cu), zinc (Zn), cobalt (Co), nickel (Ni), etc.) It exists in the environment in different forms, migrates and accumulates in the environment, and its excessive enrichment in the food chain will cause great harm to the natural environment and human health. For this reason, many methods for treating heavy metal wastewater have been studied, such as chemical precipitation, electrodialysis, photoc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26
Inventor 肖定书张喜斌李浩刘国聪李险峰
Owner HUIZHOU UNIV
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