Polysiloxane surface modified with bipyrazolic tripodal receptor for quantitative lead adsorption

被引：33

作者：

Radi, Smaail ^{[1
]}

Tighadouini, Said ^{[1
]}

Toubi, Yahya ^{[1
]}

Bacquet, Maryse ^{[2
]}

机构：

[1] Univ Med 1, Fac Sci,Equipe Chim Bioorgan & Macromol, Dept Chim,Lab Chim Organ Macromol & Prod Nat, Unite Associee CNRST URAC 25, Oujda 60000, Morocco

[2] Univ Sci & Tech Lille Flandres Artois, UMET Unite Mat & Transformat UMR8207, Equipe Ingn Systemes Polymeres, Villeneuve Dascq, France

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2011年 / 185卷 / 01期

关键词：

Chemically modified SiO2; Preparation; Characterization; Adsorption; Pb(II); SOLID-PHASE EXTRACTION; CATION-BINDING PROPERTIES; METAL-ION EXTRACTION; SILICA-GEL SURFACE; ATOMIC-ABSORPTION-SPECTROMETRY; POROUS SILICA; TRACE-METALS; VOLTAMMETRIC DETERMINATION; FLUORESCENCE SPECTROMETRY; TETRAPYRAZOLIC MACROCYCLE;

D O I：

10.1016/j.jhazmat.2010.09.016

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new silica gel compound modified N,N-bis(3,5-dimethylpyrazol-1-ylmethyl) amine (SiN(2)Pz) was synthesized and characterized by elemental analysis, FT-IR, C-13 NMR of the solid state, nitrogen adsorption-desorption isotherm, BET surface area and BJH pore sizes. The new surface exhibits good chemical and thermal stability determined by thermogravimetry curves (TGA). The effect of pH and stirring time on the adsorption of Pb(II) were studied. The process of metal retention was followed by batch method and the optimum pH value for the quantitative adsorption of this toxic metal ion was 7. At this pH value, the new functionalized polysiloxane presents further improvements and shows higher affinity (123 mg of Pb2+/g of silica) for the effective adsorption of Pb(II) compared to others described sorbents. The extracted amounts of Pb(II) were determined by atomic absorption measurements. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：494 / 501

页数：8

共 74 条

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