X-ray photoelectron spectroscopic analysis of lead accumulated in aquatic bryophytes.
Lead accumulated in aquatic bryophytes, Pohlia ludwigii, Scapania undulata and Pellia endiviifolia, has been characterized by X-ray photoelectron spectroscopy (XPS). The well resolved pb 4f (4f(7 2 ) and 4f(5 2 )) spectra indicate that the bonding state of lead in each bryophyte is that giving a fairly narrow distribution in the binding energy. The Pb 4f(7 2 ) binding energy depends on the bryophyte species and is lower than that for lead sulphate. It is also possible to use XPS to detect zinc and copper accumulated in bryophytes.
Soma
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The National Institute for Environmental Studies, Tsukuba, Ibaraki 305, Japan.
Seyama
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Satake
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