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首页> 外文期刊>Environmental Science & Technology >Adsorption Of Eu(iii) On A Heterogeneous Surface Studied By Time-resolved Laser Fluorescence Microscopy (trlfm)
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Adsorption Of Eu(iii) On A Heterogeneous Surface Studied By Time-resolved Laser Fluorescence Microscopy (trlfm)

机译：时间分辨激光荧光显微镜研究异质表面上Eu（iii）的吸附（trlfm）

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摘要

Time-resolved laser fluorescence microscopy (TRLFM) is a useful tool to simultaneously investigate the intensity, location, type, and surrounding chemical environment of a fluorophore. In this study, we demonstrated the applicability of TRLFM for the adsorption of Eu(lll) on a natural heterogeneous surface. Different adsorption species of Eu(lll) were observed on the Makabe granite surface and its constituents (biotite, plagioclase, potassium feldspar, and quartz). Eu(lll) heterogeneously adsorbed on biotite, plagioclase, and quartz and homogeneously on potassium feldspar. The histograms of the fluorescence decay rates of adsorbed Eu(lll) indicated efficient quenching of Eu(lll)fluorescence probably due to Eu-surface interaction or the formation polynuclear hydoxo Eu(lll) species on the surfaces. It was also revealed that single species of Eu(lll) was observed on biotite and two species on plagioclase and potassium feldspar. The adsorption of Eu(lll) on the granite surface was highly heterogeneous. The TRLFM measurements of different regions of the granite surface turned into the finding of Eu(lll) with differentf luorescence decay rates. Comparing with the fluorescence decay histograms of the mineral constituents, Eu(lll) clearly adsorbed on the feldspar family. It was also found that Eu(lll) adsorbed as an outer-sphere complex and on an altered mineral of the granite.
机译：时间分辨激光荧光显微镜（TRLFM）是一种有用的工具，可同时研究荧光团的强度，位置，类型和周围的化学环境。在这项研究中，我们证明了TRLFM在自然异质表面上吸附Eu（III）的适用性。在Makabe花岗岩表面及其成分（黑云母，斜长石，钾长石和石英）中观察到了不同的Eu（III）吸附物种。 Eu（III）异质吸附在黑云母，斜长石和石英上，并均匀吸附在钾长石上。吸附的Eu（III）的荧光衰减率的直方图表明Eu（III）荧光的有效猝灭可能归因于Eu III-表面相互作用或表面上形成的多核羟基Eu（III）物质。还揭示了在黑云母中观察到单一种类的Eu（III），在斜长石和钾长石上观察到两种。 Eu（III）在花岗岩表面的吸附非常不均匀。花岗岩表面不同区域的TRLFM测量结果变成了荧光衰减率不同的Eu（III）。与矿物成分的荧光衰减直方图相比，Eu（III）明显吸附在长石族上。还发现Eu（III）作为外层络合物被吸附并且被吸附在花岗岩的改变的矿物上。

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