Glycine grafted chloromethyl polystyrene resin heavy metal ion adsorbent and its preparation method and application

A chloromethyl polystyrene, heavy metal ion technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc. Problems such as long adsorption equilibrium time, to achieve the effect of easy recyclability, good selectivity, and simple synthesis method

Inactive Publication Date: 2017-01-25
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reaction process is relatively complicated, and the synthesized resin is used to resolve various α-amino acid racemic mixtures
[0013] The above technologies are the synthesis and application of amino acids grafted with different carrier adsorbents in different ways. It can be seen from the analysis that the shortcomings of the above existing technologies are: the preparation process is complicated, the selectivity is not good enough, and the adsorption equilibrium time is long. etc. Due to different carriers selected and amino acid grafting methods, the prepared adsorbents also have different structures, so the adsorption mechanism is different, thus showing different selective adsorption properties for different metal ions.
[0014] So far, there is no heavy metal ion adsorbent for grafting chloromethyl polystyrene resin with glycine through one-step reaction and for Pb 2+ Reports of the selective separation, enrichment and removal of

Method used

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  • Glycine grafted chloromethyl polystyrene resin heavy metal ion adsorbent and its preparation method and application
  • Glycine grafted chloromethyl polystyrene resin heavy metal ion adsorbent and its preparation method and application
  • Glycine grafted chloromethyl polystyrene resin heavy metal ion adsorbent and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0031] Weigh 1g of chloromethyl polystyrene resin, swell it with ethanol solution for 12h, transfer it to a conical flask, add 10mL of ethanol, and then add 80mL of an aqueous solution containing 4.67g of glycine and 13mL of triethylamine, seal it, and store it at 80°C The synthesis reaction was shaken for 12 hours. After the synthesis, cooled to room temperature, filtered, washed with ethanol and deionized water until the filtrate was neutral, and dried in vacuum at 60°C for 12 hours. Finally, a light yellow product was obtained, which was glycine grafted with chloromethyl Polystyrene resin heavy metal ion adsorbent, the product is sealed in a bottle and stored in a desiccator for later use.

[0032] The glycine grafted chloromethyl polystyrene resin heavy metal ion adsorbent synthesized by the present invention has a structure containing N, O coordination atoms. According to the theory of soft and hard acids and bases, the hardness of the reagent containing N, O coordination ...

Embodiment 2

[0052]Weigh 0.5g of chloromethyl polystyrene resin, swell with ethanol solution for 12h, then transfer to a 100mL conical flask, add 8mL of ethanol to the conical flask, and then add 40mL of an aqueous solution containing 2.34g of glycine and 8mL of triethylamine , after sealing, the synthesis reaction was shaken at 70°C for 16 hours, cooled to room temperature after the synthesis, filtered, washed with ethanol and deionized water in turn until the filtrate was neutral, and vacuum-dried at 60°C for 12 hours, and finally the light yellow product glycine was obtained Graft chloromethyl polystyrene resin as an adsorbent for heavy metal ions, seal the product in a bottle, and store it in a desiccator for future use.

[0053] Weigh 0.1 g of the prepared heavy metal ion adsorbent and fill it into a solid phase separation column to make a solid phase extraction microcolumn (column inner diameter 3 mm, column height 20 mm). Take a certain amount of Pb 2+ sample solution, with 0.1mol / ...

Embodiment 3

[0056] Weigh 1g of chloromethyl polystyrene resin, swell it with ethanol solution for 12h and transfer it to a 250ml conical flask, add 10mL of ethanol to the conical flask, then add 80mL of an aqueous solution containing 9.35g of glycine and 13mL of triethylamine, After sealing, the synthesis reaction was shaken at 60°C for 24 hours. After the synthesis was completed, it was cooled to room temperature, filtered, washed with ethanol and deionized water in sequence until the filtrate was neutral, and vacuum-dried at 60°C for 24 hours to finally obtain the light yellow product glycine grafted Branched chloromethyl polystyrene resin heavy metal ion adsorbent, the product is sealed in a bottle and stored in a desiccator for subsequent use.

[0057] Weigh 0.2g of the prepared heavy metal ion adsorbent and fill it into a solid phase separation column to make a solid phase extraction microcolumn (column inner diameter 3mm, column height 40mm), take a certain amount of Pb 2+ sample so...

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Abstract

The invention discloses a heavy metal ion adsorbent for grating glycine to chloromethylated polystyrene, a preparation method and an application thereof, and belongs to the technical field of a solid-phase extraction agent. The technical solution of the invention is that: a heavy metal ion adsorbent for grafting glycine to chloromethylated polystyrene takes chloromethylated polystyrene and glycine as raw materials, and glycine is grafted on the chloromethylated polystyrene surface through one-step synthesis. The invention further discloses the preparation method of the heavy metal ion adsorbent for grating glycine to chloromethylated polystyrene and the application of taking the adsorbent as the solid-phase extraction agent to selectively separate and enrich trace Pb2+ from environmental samples. The heavy metal ion adsorbent is simple in a synthetic method, good in selectivity and high in sensitivity, nontoxic, easy to regenerate and recyclable.

Description

technical field [0001] The invention belongs to the technical field of solid-phase extractants, and in particular relates to a glycine-grafted chloromethyl polystyrene resin heavy metal ion adsorbent and a preparation method and application thereof. Background technique [0002] Lead pollution in the environment mainly comes from the wastewater produced by paint production, metallurgy, and machinery manufacturing. Lead is a cumulative poison that cannot be degraded after entering the environment. Due to the non-degradable and accumulative nature of lead, trace lead in the environment will enter the human body through food chain enrichment, water intake and breathing, which will affect the human hematopoietic system, The nervous system, cardiovascular system, genitourinary system, and bones cause serious damage, especially the damage to the growth and development of children cannot be eliminated. Therefore, it is of great significance for the detection and removal of trace l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 樊静张艳树姜聚慧张霞高霞吴春来潘加坡张洁王小龙商晓敏
Owner HENAN NORMAL UNIV
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