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Organic carbon at soil particle surfaces—evidence from x-ray photoelectron spectroscopy and surface abrasion

^a Institute of Soil Science and Soil Geography, University of Bayreuth, 95440 Bayreuth, Germany
^b Institute of Physical Chemistry II, University of Bayreuth, 95440 Bayreuth, Germany

View larger version (23K): [in a new window]   Fig. 1. Wide-scan x-ray photoelectron spectra of the surface of small aggregates (<20 µm equivalent diameter, >53 µm maximum real diameter) of a Mollic epipedon (0–10 cm) of a Typic Haplustoll before (a) and after surface abrasion by bombarding with Ar ions (b).

View larger version (21K): [in a new window]   Fig. 2. Wide-scan x-ray photoelectron spectra of the surface of soil particles (<2 mm) of the Bs horizon of a Typic Haplorthod before (a) and after surface abrasion by bombarding with Ar ions (b).