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Method for preparing metal ion imprinting adsorbent with underwater selective recognition performance

A technology for metal ion imprinting and identification performance, which is applied in chemical instruments and methods, adsorption water/sewage treatment, water/sewage treatment, etc. Complex problems, to achieve good physical chemical and mechanical stability, improve the selection and recognition performance, the effect of simple preparation process

Inactive Publication Date: 2012-08-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the metal ion-imprinted polymers prepared by traditional organic synthesis, its removal rate of metal ions has been improved to a certain extent. However, the synthesis process is complicated and the cost is high. The traditional functional monomer imprinted metal ions still exist in the water phase for the template Difficulty in identifying metal ions, unsatisfactory selective separation of template metal ions in the presence of interfering ions, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]Weigh 1.2g of silica particles and disperse them in 20mL of methanol, add 20mL of 3-propylaminoethoxysilane, 3mL of tetraethyl orthosilicate, and 10mL of 0.1mol / L acetic acid in sequence, and stir mechanically for 12 hours to prepare Amino-functionalized silica particles were obtained. Disperse 1.0 g of amino-functionalized silica particles uniformly in 20 mL of methanol solution, add a mixed solution of 3 mmol of isonicotinic acid and 0.8 mmol of sodium molybdate to it, stir mechanically for 18 h, and wash the obtained product three times with distilled water , dried after centrifugation. Take methanol-acetic acid solution with a volume ratio of 1:9 to elute the dried product for 1 h, and then use 100 mL of 1 mol / L hydrochloric acid solution to continue to elute the imprinted template for 3 h under the action of magnetic stirring. After drying, the molybdenum ion imprinting adsorbent is obtained.

[0027] Weigh 0.1mol sodium molybdate and dissolve it in 100mL water to...

Embodiment 2

[0030] Disperse 0.8g of ferric oxide particles, 3mL of oleic acid, and 1.5g of sodium lauryl sulfate in a mixture of 100mL of ethanol and water, add 5mL of APTES to the solution, and age at a constant temperature of 60°C for 2h. The solution was taken out and placed under a permanent magnet, washed three times with absolute ethanol and three times with distilled water, and put the amino-functionalized ferroferric oxide magnetic particles into a constant temperature drying oven, and dried at 80°C for 10 hours. Uniformly disperse the amino-functionalized ferroferric oxide magnetic particles in 20 mL of methanol solution, add 0.2 mmol of isonicotinic acid and 0.3 mmol of sodium molybdate mixed solution, mechanically stir for 18 hours, and wash the obtained imprinted adsorbent with distilled water 3 times, centrifuged and dried. Take methanol-acetic acid solution with a volume ratio of 1:9 to elute the dried imprinted adsorbent for 14 h, and then continue to elute the imprinted te...

Embodiment 3

[0034] Take 0.6g of silica particles and disperse them in 20mL of methanol, add 4mL of 3-propylaminoethoxysilane, 6mL of tetraethyl orthosilicate, and 1.5mL of 0.1mol / L acetic acid in sequence, and stir mechanically for 12h to prepare Amino-functionalized silica particles were obtained. Disperse the amino-functionalized silica particles evenly in 20 mL of methanol solution, add 2 mmol of isonicotinic acid and 0.3 mmol of zirconium oxychloride mixed solution, stir mechanically for 18 h, and wash the obtained imprinted adsorbent with distilled water for 3 times , dried after centrifugation. Take methanol-acetic acid solution with a volume ratio of 1:8 to elute the dried imprinted adsorbent for 14 h, and then continue to elute the imprinted template with 100 mL of 0.1 mol / L hydrochloric acid solution for 3 h under the action of magnetic stirring. After drying, the zirconium ion imprinted adsorbent is obtained.

[0035] Weigh 0.1 mol of zirconium nitrate and dissolve it in 100 m...

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Abstract

The invention provides a method for preparing a metal ion imprinting adsorbent with an underwater selective recognition performance. The method comprises the steps of: preparation of an amino functional material: dispersing a nuclear body material into a methanol solution, slowly adding 3-propylaminoethoxy silane, uniformly stirring, and then, continuously adding a cross-linking agent and a stabilizer to form the amino functional material; and preparation of the metal ion imprinting adsorbent: dispersing the amino functional material in the methanol solution, and exposing to ultrasound to obtain a solution A; dissolving isonicotinic acid and metal template ions in deionized water to form a solution B; dripping the solution B into the solution A, and reacting to obtain a white sol-like product; and eluting the metal template ions: performing Soxhlet extraction by using an acetic acid-methanol solution, then eluting the metal template ions by using a hydrochloric acid, and drying to obtain the metal ion imprinting adsorbent. The metal ion imprinting adsorbent disclosed by the invention can be widely applied to advanced treatment of drinking water as well as enrichment recovery or rapid analysis detection of metal ions in different water bodies, such as industrial waste water, aquaculture water and seawater.

Description

technical field [0001] The invention relates to a preparation method of a metal ion imprinted adsorbent, which belongs to the technical application field of environmental functional materials. Background technique [0002] Heavy metal wastewater is the most serious environmental pollution and the most harmful industrial wastewater to human beings. There are many kinds of heavy metal ions, difficult to deal with, stable chemical properties, not easy to be degraded by microorganisms, enriched through the biological chain, and have a strong toxic effect on animals and plants. Therefore, the detection and removal of heavy metal ions in wastewater is of great significance. [0003] At present, the techniques for detecting heavy metal ions mainly include spectroscopic and electrochemical methods, including: atomic absorption spectrometry, atomic emission spectrometry, atomic fluorescence, mass spectrometry, voltammetry, polarography, potential analysis, conductometric analysis W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30C02F1/28C02F1/62
Inventor 任月明马军冯静刘坪鑫范壮军张密林马伟青刘晓茜林令强张晨
Owner HARBIN ENG UNIV
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