X-ray photoelectron spectroscopy has been used to identify and determine the oxidation states of a number of major and minor elements present on the surface of fly ash particles. With the use of a sputtering-etching procedure, relative concentrations as a function of depth were obtained for Si, Al, Fe, Ca, Na, C, O, and S. The concentrations of Na, C, O, and S were found to decrease and Si, Al, and Fe were found to increase upon sputtering to a depth of approximately 50 Å.
DavisonR. L.NatuschD. F. S.WallaceJ. R., and EvansC. A., Environ. Sci. Technol.8, 1107 (1974).
2.
SmithR. D.CampbellJ. A., and FelixW. D., unpublished data.
3.
HulettL. W.CarlsonT. A.FishB. R., and DurhamJ. L., paper presented at the 161st National American Chemical Society Meeting, Los Angeles (April 1971).
4.
AraktingiV. E.BhaccaN. S.ProctorW. A., and RobinsonJ. W., Spectrosc. Letters4, 365 (1971).
5.
NovakovT.MuellerP. K.AlcocerA. E., and OtvosJ. W., J. Colloid Interface Sci.39, 225 (1972).
6.
NatuschD. F. S., “Sampling strategy on a characterization of potential emissions from synfuel production,” in Symposium-Workshop Proceedings, Austin, TX (available NTIS-CONF-760602), p. 82.
7.
BibbyD. M., Fuel56, 427 (1977).
8.
LotzW., J. Opt. Soc. Am.60, 206 (1970).
9.
LindsayJ. R.RoseH. J.Jr.SwartzW. E.WattsP. H.Jr., and RayburnK. A., Appl. Spectrosc.27, 1 (1973).
10.
NordbergR.BrechtH.AldridgeR. G.FahlmanA., and Van WazerJ. R., Inorg. Chem.9, 2469 (1970).
11.
LindbergB. J.HamrinK.JohanssonG.GerliusU.FahlmanA.WordlingC., and SiegbahnK., Phys. Scr.1, 2861 (1970).
12.
SchultzH. D. and ProctorW. G., Appl. Spectrosc.27, 347 (1973).
13.
CarverJ. C.SchweitzerG. K., and CarlsonT. A., J. Chem. Phys.57, 973 (1972).
14.
BerthouH. and JorgensenC. K., Anal. Chem.47, 483 (1975).
15.
OndovJ. M.ZollerW. H.OlmezI.ArasN. K.GordonG. E.RancitelliL. A.AbelK. H.FilbyR. H.ShahK. R., and RagainiR. C., Anal. Chem.47, 1102 (1975).
16.
CampbellJ. A.SmithR. D.NielsonK. K., and LaulJ. C., unpublished data.
17.
LintonR. W.LohA.NatuschD. F. S.EvansC. A.Jr., and WilliamsD., Science191, 852 (1976).
