火焰原子吸收法研究纳米钛酸锶钡粉体对铅的吸附性能

doi:10.3964/j.issn.1000-0593.2008.01.053

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Abstract Nanosized barium-stroutium titanate (BST) powder，a double salt sorbent, was prepared from BaCl₂,SrCl₂ and TiCl₄ by using oxalate co-precipitate method, and characterized by using transmission electron microscope(TEM), X-ray diffraction (XRD) and Fourier transform infrared spectrophotometer(FTIR). By means of determination with flame atomic absorption spectrometry(FAAS), the adsorption characteristic of lead on the BST powder was investigated. The results showed that the forms of the BST powders are clubbed, highly pure perovskite, and the average particle diameter is 36 nm. Lead can be adsorbed strongly on nanosized BST. The adsorption capacity of BST nanoparticle towards lead was found to be 13 mg·g^-1 when the pH is 6.0, and 0.5 mol·L^-1 HNO₃ is sufficient for complete elution. A new method for the determination of trace lead based on BST nanoparticle separation/preconcentration and FAAS determination was proposed. The detection limit of this method for lead ion is 11 μg·L^-1,and the relative standard deviation is 2.6%. The method has been applied to the determination of trace lead in water samples with satisfactory results.

Key words：Nanosized barium-stroutium titanate;Adsorption/preconcentration;Lead;FAAS

Received: 2006-09-22 Accepted: 2006-12-26

ZTFLH:

O657.3

Corresponding Authors: ZHANG Dong E-mail: zhangdong1186@sina.com

Cite this article:

ZHANG Dong,SU Hui-dong,GAO Hong. Study on Adsorption Behavior of Nanosized Barium-Strontium Titanate Powder for Lead Ion in Water Using FAAS[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(01): 218-221.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593.2008.01.053 OR https://www.gpxygpfx.com/EN/Y2008/V28/I01/218

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