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Method for fast selectively adsorbing mercury ions in water based on thiazole derivative functionalized superfine fibers

A technology of ultrafine fibers and derivatives, applied in chemical instruments and methods, adsorption water/sewage treatment, alkali metal oxides/hydroxides, etc., can solve the problems of metal adsorption and selectivity differences, and achieve adsorption capacity Large, efficient, selective removal with pronounced effects

Inactive Publication Date: 2017-01-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chelate fiber and metal ions combine with coordination bonds to form a stable multi-chelate complex, and its stability is closely related to the number of coordination bonds, bond length and valence electrons, resulting in differences in metal adsorption and selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] a. Preparation of 2-amino-1,3,4-thiazole functionalized ultrafine fibers

[0023] 1) Activation stage: 1.0g polyacrylic acid graft modified polypropylene microfiber (carboxyl content 0.0058mol), 0.0058mol1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride Add salt and 0.0058mol N-hydroxysuccinimide into the beaker, measure 100mL buffer solution with pH 6.0, and stir at room temperature for 0.5h;

[0024] 2) Amidation reaction stage: put the above-mentioned activated fiber in 100mL of buffer solution with pH 7.2, and add 0.0058mol of 2-amino-1,3,4-thiazole, mix well, stir and react at room temperature for 4h, wait for the reaction At the end, wash with ultrapure water and absolute ethanol several times to remove monomers and homopolymers attached to the fibers, and dry them under vacuum at 40°C for later use.

[0025] b. Rapid and selective adsorption of mercury ions in water

[0026] Weigh 50 mg of 2-amino-1,3,4-thiazole functionalized microfibers, place them ...

Embodiment 2

[0028] a. Preparation of 2-aminothiazole functionalized ultrafine fibers

[0029] 1) Activation stage: 1.0g polyacrylic acid graft modified polypropylene microfiber (carboxyl content 0.0058mol), 0.0058mol1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride Add salt and 0.0058mol N-hydroxysuccinimide into the beaker, measure 100mL buffer solution with pH 6.0, and stir at room temperature for 0.5h;

[0030] 2) Amidation reaction stage: put the above-mentioned activated fiber in 100mL of buffer solution with pH 7.2, and add 0.0058mol of 2-aminothiazole, mix well and stir at room temperature for 4h. Wash with absolute ethanol several times to remove the monomers and homopolymers attached to the fiber, dry it under vacuum at 40°C, and set it aside.

[0031] b. Rapid and selective adsorption of mercury ions in water

[0032] Weigh 50mg of 2-aminothiazole functionalized microfibers, place them in Hg 2+ , Pb 2+ , Cd 2+ , Ni 2+ and Cu 2+ In 50ml of water, the initial conc...

Embodiment 3

[0034] a. Preparation of 2-amino-4-thiazoleacetic acid functionalized ultrafine fibers

[0035] 1) Activation stage: 1.0g polyacrylic acid graft modified polypropylene microfiber (carboxyl content 0.0058mol), 0.0058mol1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride Add salt and 0.0058mol N-hydroxysuccinimide into the beaker, measure 100mL buffer solution with pH 6.0, and stir at room temperature for 0.5h;

[0036] 2) Amidation reaction stage: put the above-mentioned activated fiber in 100mL of buffer solution with pH 7.2, and add 0.0058mol of 2-amino-4-thiazoleacetic acid, mix well, stir and react at room temperature for 4h, after the reaction is completed, use Wash with ultrapure water and absolute ethanol several times to remove monomers and homopolymers attached to the fibers, dry them in vacuum at 40°C, and set aside.

[0037] b. Rapid and selective adsorption of mercury ions in water

[0038] Weigh 50mg of 2-amino-4-thiazoleacetic acid functionalized microfi...

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Abstract

The invention provides a method for fast selectively adsorbing mercury ions in water based on thiazole derivative functionalized superfine fibers, relates to preparation and application of the thiazole derivative functionalized superfine fibers, and belongs to the technical fields of functional materials and fast adsorption of heavy metal ions. The method specifically includes using thiazole derivatives with a high chelating effect on the mercury ions to modify base fiber materials, and using static adsorption to remove the mercury ions in an aqueous solution. The method has the advantages that the mercury ions in the aqueous solution can be removed thoroughly selectively, the selected chelating agent is environmentally friendly, efficient, economic, practical and capable of simply and practically modifying the base fibers, and the prepared adsorption material is wide in source, low in cost, simple to prepare, fast and efficient in removing, high in selectivity and adsorption capacity and the like.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of rapid adsorption treatment of functional materials and heavy metals, in particular to a method for rapid and selective adsorption of mercury ions in water based on thiazole derivative functionalized ultrafine fibers. [0003] (2) Background technology [0004] With increasing population, rapid industrialization and long-term drought in some regions, the transmission of a wide variety of pollutants in groundwater and surface water has become a global concern. Wastewater contains a large amount of heavy metals, organic pollutants, inorganic pollutants and other complex compounds. Most of these pollutants are discharged into the environment through wastewater, causing great harm to human health and the ecological environment. Therefore, it is urgent to remove these pollutants. Clear, thereby improving the living environment of human beings. In particular, the waste gas and wastewater discharged fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/265B01J20/28023C02F1/288C02F2101/20
Inventor 王会才刘明强孙强张报昌陶忠安刘霞平杨继斌
Owner TIANJIN POLYTECHNIC UNIV
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