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)-jarosite by shewanella putrefaciens: providing new insights into Tl biogeochemistry[J]. Environmental Science & Technology, 2012, 46(20): 11086-11094. [4] BETHKE C M, SANFORD R A, KIRK M F, et al... and its transformation to jarosite in the presence of acidophilic iron-oxidizing microorganisms[J]. Materials Science and Engineering: C, 2006, 26(4): 588-592. [15] MANCEAU A, NAGY K L. Quantitative......
) and scanning electron microscopy(SEM).It is indicated that jarosite may not be responsible for hindered dissolution.The elemental sulfur layer on the surface of pyritic chalcopyrite residues... as Cu 4 Fe 2 S 9 >Cu 4 S 11 >S 8 >jarosite.关键词:......
from jarosite type compounds by hydrothermal conversion[J]. Canadian Metallurgical Quarterly, 2012, 51(1): 11-23. [18] CLAASSEN J O, SANDENBERGH R F. Particle growth parameters in the precipitation... content is a key factor which affects the hematite quality and its utilization as a resource. The residual sulfur in hematite precipitate is attributed to the part existing as metastable jarosite......
recovery rate: gold occurrence, tight junctions of gold-bearing pyrite with gangue minerals, jarosite coating of the ore, and the carbonaceous matter content.关键词:......
of jarosite in columns, especially at 60℃. The results gave implications to the optimization of heap bioleaching of secondary copper sulfide in both enhanced chalcocite leaching and acid/iron balance......
) pulp density with less than 10% loss of productivity, and resist arsenic up to 15 g/L. There were a lot of jarosite, arsenolite and sulfur, but not scorodite and ferric arsenate in the bioleached residue. Jarosite passivation and lower sulfur-oxidizing activity of the cells due to the toxicity of the high concentrations of soluble arsenic and iron ions at low pH value should mainly response......
sulfur, jarosite, bornite and chalcocite were found at days 2 and 4; and 2) bornite and chalcocite disappeared, covellite formed, and jarosite gradually became the main component at days 6 and 10... chalcopyrite (CuFeS2), covellite (CuS), chalcocite (Cu2S) and jarosite (KFe3(SO4)2(OH)6) samples used in this study were provided by School of Minerals Processing and Bioengineering, Central South......
and magnesia. According to the characteristics of the mineral, the joint technics on leaching and sodium jarosite process were implemented to reclaim nickel and iron. The results show......
dissolved secondary mineral chalcocite at a low redox potential (<400 mV) and then enhanced the copper dissolution. Jarosite accumulated immediately in the initial stage of bioleaching with activated carbon but copper dissolution was not hindered. However, much jarosite precipitated on the surface of chalcopyrite in the late stage of bioleaching, which might account for the decrease of copper......
of jarosite as a passivation layer on the mineral surface during bioleaching. In the bioleaching using the mixed culture, low pH is got from the sulfur oxidizing inhibiting, the formation of jarosite...). The bioleaching mechanisms of chalcopyrite by the culture and the role of jarosite are discussed. 2 Experimental 2.1 Culture media and microorganism The bacteria used in the experiment were A. ferrooxidans......