AN X-RAY PHOTOELECTRON SPECTROSCOPIC INVESTIGATION OF CHALCOPYRITE AND PYRITE SURFACES AFTER CONDITIONING IN SODIUM SULFIDE SOLUTIONS

被引:42
作者
MCCARRON, JJ
WALKER, GW
BUCKLEY, AN
机构
[1] MITRE CORP,7525 COLSHIRE DR,MCLEAN,VA 22102
[2] CSIRO,DIV COAL & ENERGY TECHNOL,N RYDE,NSW 2113,AUSTRALIA
[3] BELVOIR RES DEV & ENGN CTR,STRBE JDR,FT BELVOIR,VA 22060
关键词
D O I
10.1016/0301-7516(90)90064-6
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The effects of sodium sulfide solutions at pH 9.2 on fresh fracture and oxidized fracture surfaces of chalcopyrite and pyrite have been investigated by X-ray photoelectron spectroscopy. At open circuit in the presence of oxygen, the mineral surfaces became enriched in sulfur at each sodium sulfide concentration used. In 3 X 10(-2) mol dm-3 solution, monolayer quantities of elemental sulfur were produced at the surface of pyrite whereas the sulfur-rich surface for chalcopyrite was a metal-deficient extension of the sulfide lattice. Multilayer quantities of elemental sulfur were produced at the surfaces of both minerals in 3 X 10(-3) and 3 x 10(-4) mol dm-3 sulfide solutions; however, for a given sulfide concentration, the coverage for pyrite was greater than that for chalcopyrite. Thick layers of elemental sulfur were deposited on both minerals from 3 x 10(-3) sodium sulfide solution at applied potentials more positive than the open circuit potential.
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页码:1 / 16
页数:16
相关论文
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