@inproceedings{f2cea7f4552e4f02be016af6e07de6c6,
title = "An XPS and XANES Study on the Bioleaching of Arsenopyrite with or without Pyrite",
abstract = "In the present study, we investigated the bioleaching of arsenopyrite with or without pyrite by moderate thermophiles. In both chemical leaching and bioleaching, the addition of pyrite decreased the leaching rate of arsenopyrite. The arsenic speciation and minerology changes in the residues were analysed by X-ray Absorption Near Edge Structure (XANES) Spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and powder X-ray Diffraction (XRD). The XANES analysis showed no detectable arsenopyrite in the final residues from the experiments without pyrite. However, there was still 21.7% of arsenic species presented as arsenopyrite after bioleaching, when the initial arsenopyrite/pyrite ratio was 1:5. The XPS analysis revealed there was only As(V) on the surface of most of the residues, except on one chemically leached sample where As(III) was found.",
keywords = "Arsenopyrite, As speciation, Bioleaching, XANES, XPS",
author = "Yi Yang and Weihua Liu and Chun Wang and Miao Chen and Rahul Ram and Bhargava, {Suresh K.}",
year = "2017",
month = jan,
day = "1",
doi = "10.4028/www.scientific.net/SSP.262.53",
language = "English",
isbn = "9783035711806",
volume = "262",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications",
pages = "53--56",
editor = "Wolfgang Sand and Kathrin Rubberdt and Franz Glombitza and Wolfgang Sand and Veliz, {Mario Vera} and Sabine Willscher and Sabrina Hedrich and Axel Schippers",
booktitle = "22nd International Biohydrometallurgy Symposium",
address = "Switzerland",
note = "International Biohydrometallurgy Symposium (IBS), IBS ; Conference date: 01-01-2050",
}