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in the other cultures. Key words: bioleaching; zinc; tetrathionate; microbial attachment; Acidianus copahuensis; thermophiles 1 Introduction Zinc is mainly produced through the extraction of zinc from... and extreme thermophiles that facilitate high zinc extraction rates due to the high temperatures but also due to the metabolic characteristics of these microorganisms [2,10-14]. Recently, we have......
Trans. Nonferrous Met. Soc. China 29(2019) 1294-1303 Comparative study on chalcopyrite bioleaching with assistance of different carbon materials by mixed moderate thermophiles Ping ZHU1,3, Xue-duan... artificial graphite (AG), carbon black (CB), activated carbon (AC) and carbon nanotube (CN) on chalcopyrite bioleaching by mixed moderate thermophiles was comparatively investigated. In AC and AG added......
生物工艺学李长山,冯福贤摘 要:<正> 微生物在溶浸金属中的作用,细菌浸出用于铜铀的回收,多年来就为人们所重视.微生物用于废石和矿石堆浸相当普遍.细菌浸出技术主要与氧化铁硫杆菌的生长和代谢有关.这种细菌在温度35℃,高酸性环境下,在金属精矿中繁殖.然而其他微生物也能浸出金属.这些细菌包括在温度50℃下能氧化铁和金属硫化物的兼性热质菌(Facultative thermophiles),在50~70℃关键词:......
with moderate thermophilic bacteria was conducted at different temperatures. The results show that the moderate thermophiles can present bioleaching ability at 12-55 ℃ during leaching process. The optimum growth temperature is 45-50℃. When the temperature reaches 60 ℃, moderate thermophiles can maintain activity in the initial stage, but after a few days the bacteria concentration reduces gradually......
test. The extreme thermophiles were shown to display superior kinetics of dissolution of zinc compared with the mesophiles as confirmed by the statistical analysis. Bioleaching performance of the extreme thermophiles is found to improve in response to the increase in acidity (pH from 2.0 to 1.0) whilst the activity of the mesophiles is adversely affected by decreasing pH. Statistical analysis......
of mesophiles and moderate thermophiles and valuating the effect of venting capacity as well as pulp density on marmatite leaching performance of moderate thermophiles. The results show that moderate thermophiles have more advantages over mesophilies in bioleaching marmatite at 45 ℃ and the pulp density of 50 g/L, and the zinc extraction efficiency reaches 93.1% in 20 d. Aeration agitation can improve......
effect can be eliminated by thermophilic bioleaching.The industrial test of BioCOP technology based on thermophiles was successfully completed,which confirmed the feasibility of chalcopyrite......
gold concentrate with 19% arsenic was treated by a mixed moderately thermophiles in an airlift bioreactor through an adaptation protocol. The moderately thermophiles could respond well to 20% (w/v......
thermophiles. Even though microbial abundance and activity were highest at 30℃, the column at a higher temperature achieved a much higher Cu leaching efficiency and recovery, which suggested......
Trans. Nonferrous Met. Soc. China 28(2018) 1847-1853 Comparative study on bioleaching of two different types of low-grade copper tailings by mixed moderate thermophiles Xiao-dong HAO1,2, Xue-duan...-grade copper tailings, acid-leaching tailings (ALT) and copper flotation tailings (CFT) by mixed moderate thermophiles, and the variation of mineralogical and microbiological characteristics during......
