| 光谱学与光谱分析 |
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| Analysis the Properties of Cr2O2-7 Adsorption onto Functional Organic Reagent Modified Nano-SiO2 by Flame Atomic Absorption Spectroscopy |
| ZHANG Zu-lei，LI Lei* |
| School of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001, China |
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Abstract A new type of functional organic reagent modified nano-SiO2 sorbent (Si|(CH2)3-NH-CO-Ph-CH2-P(C6H5)3Br) was synthesized by several reasonable organic combination reactions using nano-SiO2, γ-Aminopropyl triethoxysilane (KH-550) and functional organic reagent (COOH-Ph-CH2-P(C6H5)3Br) as raw materials. The prepared new sorbent was characterized by using FTIR, particle diameter and TG. A batch of adsorption experiments was performed to evaluate its adsorption behavior of Cr2O2-7 by flame atomic absorption spectroscopy (FAAS). The effects of solution pH, shaken time and sorbent amount on the extraction of Cr2O2-7 from aqueous solutions were studied. Results showed that when under the optimum conditions the solution pH 1, sorbent amount=0.1 g, and shaken time=30 min, the adsorption efficiency can be more than 95%. It indicated that this novel sorbent (Si｜(CH2)3-NH-CO-Ph-CH2-P (C6H5)3Br) was a solid sorbent being efficient and low-cost, with convenient separation, and can remove trace Cr2O2-7 in environmental waste water.
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Received: 2010-05-02
Accepted: 2010-08-06
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Corresponding Authors:
LI Lei
E-mail: lileichem@yahoo.com.cn
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