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Method of preparing adsorbent of heavy metal ion

A technology of heavy metal ions and adsorbents, applied in the direction of non-metallic elements, chemical instruments and methods, molecular sieve compounds, etc., can solve the problems of limiting adsorbents, and achieve the effects of simple operation, high mechanical stability, and high hydrothermal stability

Inactive Publication Date: 2006-02-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Application Information

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Problems solved by technology

Therefore, its practical application as an adsorbent for wastewater treatment is severely limited.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Under stirring at 55°C, 1.0 g of nonionic polymer C 18 h 37 (OCH 2 CH 2 ) 10 OH (Brij-76) was dissolved in 8.0 g deionized water and 16.0 g 2M HCl, after the solution was clear, 1.215 g (MeO) was added 3 SiCH 2 CH 2 Si(OMe) 3 and 0.098g(MeO) 3 SiCH 2 CH 2 CH 2 SH, aging with stirring for more than 24h, crystallized at 55°C for 16h. After the product was filtered, washed with water and dried, it was extracted with a mixed solution of 160ml of absolute ethanol and 1g of HCl at 55°C for 6h to obtain an organic / inorganic hybrid mesoporous material containing -SH adsorption center. The samples were tested by XRD, N 2 Adsorption / desorption, TEM characterization confirmed a highly ordered two-dimensional hexagonal phase structure. The BET specific surface area of ​​the material is 1011m 2 / g; the pore volume is 0.86cm 3 / g; the channel size is 3.40nm. Wherein the S content is 0.68mmol / g.

Embodiment 2

[0023] Adopt the preparation process of embodiment 1, add 1.08g (MeO) 3 SiCH 2 CH 2 Si(OMe) 3 and 0.196g(MeO) 3 SiCH 2 CH 2 CH 2 SH as silicon source. Stir at room temperature for 72 hours, and crystallize at 100°C for 24 hours. The specific surface area of ​​the obtained material is 958m 2 / g; the pore volume is 0.67cm 3 / g; the channel size is 2.20nm. Wherein the S content is 1.69mmol / g.

Embodiment 3

[0025] Adopt the preparation process of embodiment 1, add 0.945g (MeO) 3 SiCH 2 CH 2 Si(OMe) 3 and 0.294g(MeO) 3 SiCH 2 CH 2 CH 2 SH as silicon source. The product was extracted with a mixed solution of 120ml of absolute ethanol and 2.4g of HCl at 60°C for 3 hours, and the specific surface area of ​​the obtained material was 673m 2 / g; the pore volume is 0.41cm 3 / g; the channel size is 1.69nm. Wherein the S content is 2.12 mmol / g.

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Abstract

A process for preparing the adsorbent of heavy metal ions (Hg, Cd, Cu, Cr and Zn) features that the non-ionic polymer as template and the mixture of (MeO)3SiCH2CH2Si(OMe)3 and (MeO)3SiCH2CH2CH2SH are copolymerized in acidic medium to obtain the organic / inorganic hybridized meso-porous material containing-SH adsorbing center. Its advantages are large specific surface area, order artery structure, high stability and high adsorptive power.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent, in particular to a preparation method of a heavy metal ion adsorbent. Background technique [0002] Since the mesoporous silica material was reported in the early 1990s, due to its large specific surface area and ordered pore structure, it has received extensive attention and has been tried to be applied in research fields such as catalysis, adsorption, separation and sensors. However, since the mesoporous silica material itself has no active centers, active components need to be introduced by one-step copolymerization or post-grafting in specific applications. Organic functional groups such as -NH 2 ,-SH modified mesoporous silica has a strong adsorption effect on heavy metal ions, and is considered to be a kind of heavy metal ion adsorbent with development potential. However, the stability of the mesoporous silica material itself, especially the hydrothermal stability, is low, and about...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30C01B37/00
Inventor 杨启华刘健杨杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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