Analysis the Properties of Cr2O72- Adsorption onto Functional Organic Reagent Modified Nano-SiO2 by Flame Atomic Absorption Spectroscopy

作者：Zhang Zu lei; Li Lei^*

来源：Spectroscopy and Spectral Analysis, 2011, 31(2): 555-559.

DOI：10.3964/j.issn.1000-0593(2011)02-0555-05

• Nano-SiO2
• Functional organic reagent modifying
• Adsorption
• Cr2O72-

A new type of functional organic reagent modified nano-SiO2 sorbent (Si vertical bar(CH2)(3)-NH-CO-Ph-CHs-P(C6H5)(3)Br) was synthesized by several reasonable organic combination reactions using nano-SiO2, gamma-Aminopropyl triethoxysilane (KH-550) and functional organic reagent (COOH-Ph-CH2-P(C6H5)(3)Br) 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 Cr2O72- by flame atomic absorption spectroscopy (FAAS). The effects of solution pH, shaken time and sorbent amount on the extraction of Cr2O72- 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 vertical bar(CH2)(3)-NH-CO-Ph-CH2-P (C6H5)(3)Br) was a solid sorbent being efficient and low-cost, with convenient separation, and can remove trace Cr2O72- in environmental waste water.

• 出版日期2011-2
• 单位嘉兴学院