XPS, AES and ESR studies of Herastrau Lake sediments, Bucharest, Romania

被引：0
|
作者：
Seletchi, E. D. [1 ]
Negrila, C. [2 ]
Duliu, O. G. [3 ]
Turcas, C. V. [4 ]
机构：
[1] Univ Bucharest, Fac Phys, POB MG-11, Bucharest 077125, Romania
[2] Natl Inst Mat & Phys, Bucharest 07125, Romania
[3] Univ Bucharest, Dept Atom & Nucl Phys, Bucharest 077125, Romania
[4] Univ Bucharest, Fac Chem, Bucharest 030018, Romania
来源：
SIX INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION | 2007年 / 899卷
关键词：
XPS; AES; ESR; binding energy; free radicals; sediments;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
X-Ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES) have been used to investigate the elemental composition, chemical and electronic state of elements that exist within the Herastrau Lake (Bucharest, Romania) sediments. XPS spectra were obtained by irradiating the sediment samples with an Al source of X-rays (1486.6 eV). A very broad peak at 165-190 eV corresponds to sulfur oxides, sulfate and sulfite ions and sulfur hexafluoride. The measurements indicate metal oxides: (Al2O3, Fe2O3) at 528-531 eV, SiO2 at 533 eV, phosphates, nitrates at 531-533 eV, silicates at 532-533 eV, CaO, CaCO3 and CaS at 346-347 eV, CaSo(4) at 348 eV, Ca(NO3)(2) at 349 eV and slight traces of NH3. A very intense peak at 784 eV also appears due to CoSO4. The analysis of Electron Spin Resonance (ESR) spectra revealed an additional free radical peak in the center of Mn2+ sextet, at a g = 2.0038, attributed to SO3- species as well a very intense and broad signal due to Fe3+ ions.
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页码：411 / +
页数：2
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