Method for preparing heavy metal extraction agent microcapsule and application of heavy metal extraction agent microcapsule to heavy metal wastewater treatment

An extractant and heavy metal technology, which is applied in the field of preparation of heavy metal extractants, can solve the problems of large differences in polarity and water solubility, difficult industrialization and mass production, and complicated technology, and is conducive to selective adsorption and desorption, maintaining The effect of capsule integrity

Active Publication Date: 2015-06-17
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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  • Method for preparing heavy metal extraction agent microcapsule and application of heavy metal extraction agent microcapsule to heavy metal wastewater treatment
  • Method for preparing heavy metal extraction agent microcapsule and application of heavy metal extraction agent microcapsule to heavy metal wastewater treatment
  • Method for preparing heavy metal extraction agent microcapsule and application of heavy metal extraction agent microcapsule to heavy metal wastewater treatment

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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 extraction agent microcapsule and application thereof. The heavy metal extraction agent microcapsule is composed of a hollow capsule and a heavy metal extraction agent wrapped by the hollow capsule. A method for preparing the microcapsule comprises the following steps: 2-10 parts of a monofunctional monomer, 5-15 parts of a functional polymeric monomer, 0.1-3 parts of a cross-linking agent, 0.1-2 parts of a photoinitiator or thermal initiator, 0.1-3 parts of an emulsifier and 100 parts of water are adopted to be subjected to emulsification, ultrasonic cavitation, cured forming, rinsing and drying to be prepared into the hollow capsule; by utilizing the pressure difference and the concentration gradient, the heavy metal extraction agent is diffused and permeated into the hollow capsule to obtain the microcapsule. Air bubbles released by ultrasonic cavitation and the initiator are used as a template, and the hollow capsule is formed through homogeneous emulsification, so that the preparation method saves time and labor, and the capsule integrity can be kept well. The extraction agent microcapsule can be applied to treatment of selective adsorption or desorption of heavy metal ions in water and is flexible in application way and wide in range of application.

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 Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J13/14B01J13/18C02F1/28C02F1/62C02F1/26
Inventor 肖定书张喜斌李浩刘国聪李险峰
Owner HUIZHOU UNIV
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