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Trans. Nonferrous Met. Soc. China 28(2018) 766-774 Bio-dissolution of pyrite by Phanerochaete chrysosporium Hong-ying YANG1, Qian LIU1,2, Guo-bao CHEN1, Lin-lin TONG1, Auwalu ALI1 1. School... chrysosporium; pyrite; bio-dissolution; Carlin-type gold ores; electrochemistry 1 Introduction Carlin-type gold ores are a kind of refractory gold ores due to the micro-disseminated gold and the "preg......
process of molybdenum middings[J]. The Chinese Journal of Process Engineering, 2010, 10(3): 554-558. [11] ABDOLLAHI H, SHAFAEI S Z, NOAPARAST M, MANAFI Z, ASLAN N. Bio-dissolution of Cu, Mo and Re... of molybdenite dissolution in copper matte and the effects of mixture ratio, smelting temperature and air flow were investigated. The results show that molybdenite can be digested completely into copper matte......
by almost 10%, but both D50 and D90 decreased by (40±3)% from the middle to late stage. It means that the pyrite bio-dissolution resulted from late stages. Figure 3 X-ray powder diffraction..., but they are different from the original cells. Pyrite dissolution mainly occurs at the early and late stages with the decreasing of particle diameter, by 50% and 40%, respectively. The 16S rDNA gene......
, DAS T, KAR R N, RAO K S, SUKLA L B, MISHRA B K. Bio-dissolution of copper from Khetri lagoon material by adapted strain of Acidithiobacillus ferrooxidans [J]. Korean Journal of Chemical Engineering... that the consortium was able to reduce the refractory behavior of the concentrate, allowing 91.6% of gold recovery; at the same time, high dissolution of copper and zinc was reached. These dissolutions followed......
]. Transactions of Nonferrous Metals Society of China, 2017, 27: 197-203. [5] YANG Hong-ying, LIU Qian, CHEN Guo-bao, TONG Lin-lin, ALI A. Bio-dissolution of pyrite by Phanerochaete chrysosporium [J... with the original bacteria (15.3%). A pretreatment via blank roasting for stone coal further improved the vanadium dissolution by bioleaching, namely, 68.3% vanadium was extracted, which was much higher than......
includes particle size, stirring speed, bio-dissolution time, volume of inoculum, pulp density and process pH. 2 Experimental 2.1 Ore A complex sulphide ore obtained from Ishiagu, Nigeria was used... at varying particle sizes. The dissolution at varying pulp density, volume of inoculum, solution pH and the low solution potential observed are also influenced by ore mineralogy. Key words: sulphide......
Trans. Nonferrous Met. Soc. China 23(2013) 219-230 Bio-dissolution of Cu, Mo and Re from molybdenite concentrate using mix mesophilic microorganism in shake flask H. ABDOLLAHI1, S. Z. SHAFAEI1, M... sulfidic minerals by Fe3+ oxidation of the metal sulfide bond (Eq. (1)), using chalcopyrite as an example. Acidophilic microorganisms catalyze metal dissolution by oxidizing Fe2+ to Fe3+, thereby......
. Nevertheless, HEDRICH et al [20] believed that a significant bio-dissolution occurred at a particle size of -75 μm, compared with other particle sizes that revealed the lowest extraction rate. This could...; copper speciation; ferric leaching; mesophilic bioleaching mechanism; redox potential 1 Introduction Bio-hydrometallurgy is presented nowadays as an alternative route for hydrometallurgical and pyro......
Guo-bao, TONG Lin-lin, AUWALU A. Bio-dissolution of pyrite by Phanerochaete chrysosporium [J]. Transactions of Nonferrous Metals Society of China, 2018, 28: 766-774. [41] KHOSO S, HU Yue-hua, Lü Fei... characterisation of chalcopyrite chemically and bio-leached at high and low redox potential [J]. Minerals Engineering, 2005, 18: 505-515. [36] LI Fang-xu, ZHOU Xiao-tong, LIN Ri-xiao. Flotation performance......
Trans. Nonferrous Met. Soc. China 25(2015) 4126-4143 Empirical model for bio-extraction of copper from low grade ore using response surface methodology M. YAGHOBI MOGHADDAM1, S. Z. SHAFAEI1, M... energy and is an environmental friendly process [1-3,13-16]. Considerable physicochemical parameters, which have influence on the rate of the copper bio-extraction, have been identified such as pH value......