TY - JOUR
T1 - The role of sulfur-oxidizing bacteria Thiobacillus thiooxidans in pyrite weathering
AU - Sasaki, K.
AU - Tsunekawa, M.
AU - Ohtsuka, T.
AU - Konno, H.
N1 - Funding Information:
Appreciation is extended to the Hokkaido Industrial Research Institute and the Fritsch Japan Co. Ltd. for their assistance in the ICP-AES measurements and grinding experiments. This work was supported by a Ministry of Education, Science and Culture Grant (no. 09450380) and an Arai Science and Technology Foundation Grant.
PY - 1998/2/28
Y1 - 1998/2/28
N2 - The role of the sulfur-oxidizing bacteria Thiobacillus thiooxidans in pyrite weathering was investigated to clarify the effects of the bacteria on the dissolution behavior of pyrite and the formation of secondary minerals using Raman spectroscopy and powder X-ray diffraction (XRD) in addition to solution analysis. It was found that T thiooxidans, when present with the iron-oxidizing bacteria Thiobacillus ferrooxidans, enhanced the dissolution of Fe and S species from pyrite, whereas T. thiooxidans alone did not oxidize pyrite. Enhancement of the consumption of elemental sulfur and regeneration of Fe(II) ions were also observed with T. thiooxidans together with T. ferrrooxidans, while this did not occur with T. ferrooxidans alone. It may be assumed that the contribution of T. thiooxidans to the formation of acid mine drainage on a geochemical scale should not be overlooked, though pyrite weathering is predominantly caused by iron-oxidizing activity in T. ferrooxidans.
AB - The role of the sulfur-oxidizing bacteria Thiobacillus thiooxidans in pyrite weathering was investigated to clarify the effects of the bacteria on the dissolution behavior of pyrite and the formation of secondary minerals using Raman spectroscopy and powder X-ray diffraction (XRD) in addition to solution analysis. It was found that T thiooxidans, when present with the iron-oxidizing bacteria Thiobacillus ferrooxidans, enhanced the dissolution of Fe and S species from pyrite, whereas T. thiooxidans alone did not oxidize pyrite. Enhancement of the consumption of elemental sulfur and regeneration of Fe(II) ions were also observed with T. thiooxidans together with T. ferrrooxidans, while this did not occur with T. ferrooxidans alone. It may be assumed that the contribution of T. thiooxidans to the formation of acid mine drainage on a geochemical scale should not be overlooked, though pyrite weathering is predominantly caused by iron-oxidizing activity in T. ferrooxidans.
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U2 - 10.1016/S0927-7757(97)00200-8
DO - 10.1016/S0927-7757(97)00200-8
M3 - Article
AN - SCOPUS:0032574239
VL - 133
SP - 269
EP - 278
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
IS - 3
ER -