2019年4月5日 · XAS observations indicate that the carboxylic groups of the bacterial fraction and the ferric hydroxyl groups of the Fe/Al hydroxide are mainly responsible for Pb adsorption to the Fe/Al-B. More Pb is associated with the bacterial fraction at pH 4, whereas more Pb is bound to the mineral fraction at pH 6.5.

2023年10月15日 · Elucidation of elemental speciation at low concentration in complex matrices by XAS is shown. Pb/Zn smelter slag is a hazardous industrial waste from the Imperial Smelting Process (ISP). The speciation of zinc, lead, copper and arsenic in the slag controls their recovery or fate in the environment but has been little investigated.

One example is Pb. On the main XAS page there is a figure showing all the absorption edges of Pb that are in the X-ray range. At CAMD the L and M edges are available for research.

For the first time combined X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) experiments were carried out to probe the short- and long-range order in lanthanum-modified PbTiO 3 ceramic materials (Pb 1-x La x TiO 3) for x ranging from 0 to 30 atom % of La. XRD results show that a tetragonal structure fitted well to all samples ...

1994年8月8日 · In situ X-ray absorption spectroscopy (XAS) was used to study the structure of adsorbed Pb on carbon-supported Pt in 1 M HClO 4 + 5 × 10 −3 M Pb 2+, in the potential range −0.24 to 1.15 V vs. SCE. The XAS measurements were done using a Canberra 13-element germanium detector.

Our calculations of the p-DOS show that the top of the valence band (VB) is composed of Br 4p orbitals, with a non-negligible proportion of Pb 6s orbitals and a minor contribution of Pb 6p ...

2010年11月16日 · The quantitative analysis of soil samples XANES allowed to individuate four components as the main responsible for Pb retention in calcareous soils: the carbonate phases, responsible for around 26% of Pb absorption; the metal (Al) oxide phases, hosting about the 34% of Pb in soils; the organic phases (humus) retaining about 18% of Pb; and ...

XAS（synchrotron X-ray absorption spectroscopy）以X射线光子能量作为变量，测定材料的X射线吸收系数。 每个吸收边与材料中存在的特定原子有关，更具体地说，与将特定原子核轨道电子激发到自由或未占据的连续谱水平（轨道的电离）的量子力学转变有关。

Pb is Copper structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Pb is bonded to twelve equivalent Pb atoms to form a mixture of corner, edge, and face-sharing PbPb12 cuboctahedra.

We have investigated the local electronic structure of PbCrO3 by conducting x-ray absorption spectroscopy at the lead L3 and chromium L2,3 edges. We found that lead is divalent and chromium is...