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Recyclable material for adsorbing metal ions in wastewater

A metal ion and waste water technology, applied in the fields of adsorption water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of high price, cumbersome production, environmental pollution, etc., and achieve the effect of enhancing adsorption capacity

Active Publication Date: 2016-08-17
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing adsorption materials are often plagued by problems such as adsorption limitations (only a small amount of metals can be adsorbed), high price, cumbersome production, inability to recycle or high recycling costs caused by difficult desorption, and the current environmental pollution problem It is becoming more and more serious, so the research and development of high-efficiency and low-cost adsorption materials are urgently needed.

Method used

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  • Recyclable material for adsorbing metal ions in wastewater
  • Recyclable material for adsorbing metal ions in wastewater
  • Recyclable material for adsorbing metal ions in wastewater

Examples

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preparation example Construction

[0021] The preparation method of the above-mentioned recyclable metal ion material in adsorption wastewater comprises the following steps: (a) adding water to dissolve the metal coordination monomer, ionic liquid monomer, crosslinking agent and initiator to obtain a mixed solution; (b) making The mixed solution is polymerized, and then washed with ethanol and water respectively; the prepared polymer is preferably made into a thin film, floc or porous foam, so as to increase the contact area between the polymer and the water body containing metal ions, thereby improving Adsorption efficiency: After adsorbing metal ions, place the taken-out membrane in a hydrochloric acid solution with pH=2, and the desorption of metal ions in the existing polymer can be completed in 2-5 minutes, so as to achieve the purpose of reuse. The process is simple, low in cost and suitable for mass production. The ratio of the metal coordination monomer, crosslinking agent, initiator and water is prefer...

Embodiment 1

[0025] The present embodiment provides a kind of preparation method of recyclable metal ion adsorption material, and it comprises the following steps:

[0026] (a) 0.47g vinylimidazole (5mmol), 0.426g 1-allyl-2,3-dimethylimidazolium bromide (2mmol), 0.213g 1-allyl-2,3-dimethyl Dissolve imidazole hexafluorophosphate (1mmol), 0.036g polyethylene glycol acrylate (Mn=600) (0.06mmol), 6.8mg ammonium persulfate (APS) in 0.7ml deionized water, shake and stir to make it uniform and transparent solution;

[0027] (b) Inject the homogeneous transparent solution obtained in step (a) into a mold of 2.5×2.5×0.01 cm, heat and polymerize at 80° C. for 4 h; take out the obtained polymer from the mold, and use ethanol and deionized water respectively Wash twice and tumble dry under reduced pressure. By ICP (inductively coupled plasma emission spectrometer) test, final product is 373.3mg / g to the adsorption capacity of zinc ion, is 111.2mg / g to the adsorption capacity of copper ion (adsorptio...

Embodiment 2

[0029] The present embodiment provides a kind of preparation method of recyclable metal ion adsorption material, and it comprises the following steps:

[0030] (a) 0.47g vinylimidazole (5mmol), 0.426g 1-allyl-2,3-dimethylimidazolium bromide (2mmol), 0.213g 1-allyl-2,3-dimethyl Mix imidazole hexafluorophosphate (1 mmol), 0.036 g polyethylene glycol acrylate (Mn=600) (0.06 mmol), and 0.01 g benzoin ether, shake and stir to make a uniform transparent solution;

[0031] (b) Inject the homogeneous transparent solution obtained in step (a) into a mold of 2.5×2.5×0.01 cm, and polymerize under ultraviolet irradiation for 40 minutes; Wash twice and tumble dry under reduced pressure. Through the ICP test, the final product has an adsorption capacity of 374.2 mg / g for zinc ions, 188.7 mg / g for copper ions, 196.3 mg / g for iron ions, and 239.4 mg / g for lead ions. mg / g, and the adsorption capacity for mercury ions is 167.8 mg / g.

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Abstract

The invention relates to a recyclable material for adsorbing metal ions in wastewater. The recyclable material is prepared through copolymerizing a metal coordination monomer and an ionic liquid monomer, the metal coordination monomer is vinyl imidazole, and the ionic liquid monomer is a substance represented by one of chemical structural formulas shown in the description or is a mixture containing more of substances of the chemical structural formulas; and in the formulas, R1, R2, R3 and R4 mutually independently represent C1-18 alkyl chains, n is an integer in a range of 1-18, and X<-> is Cl<->, Br<->, I<->, NO<3><->, SO<4><2->, PO<4><3->, OH<->, PF<6><-> or TFSI<->. Hydrophilic and hydrophobic ion channels can be formed in order to enhance the metal ion adsorption ability of the material; and an adsorbed polymer can be immersed in hydrochloric acid in order to complete desorption of the metal ions, and the desorbed material can be reused to adsorb the metal ions.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a material for adsorbing metal ions in waste water, in particular to a recyclable material for adsorbing metal ions in waste water. Background technique [0002] Metal ions from mining, non-ferrous metallurgy, instrument electroplating and other industries enter water bodies, causing water pollution and seriously endangering human health and survival. To remove these metal ions, techniques such as chemical precipitation, ion exchange, electrical separation, and adsorption are generally used. Among them, the adsorption method has attracted much attention because of its characteristics of simple operation, low investment cost and good treatment effect. In recent years, the research on high molecular polymer adsorbents with fast adsorption speed, large capacity, simple and rapid desorption, and repeated use is increasing day by day. [0003] However, the existing adsorption materials ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C02F1/28C02F101/20
CPCB01J20/264C02F1/285C02F2101/20
Inventor 严锋任勇源
Owner SUZHOU UNIV
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