摘要
采用经现场吸附尾液低温驯化培养得到的嗜酸氧化亚铁硫杆菌(A f),对新疆某砂岩铀矿石样品进行了细菌浸出、双氧水浸出以及只用硫酸浸出的柱浸对比试验,试验结果表明,A f经过驯化培养后能较好地适应现场吸附尾液环境,并能在大于10 g/L酸度下保持较好的活性;细菌浸出和双氧水浸出的金属浸出率比只用硫酸浸出的金属浸出率高2%～5%。现场施工了总体积为15 m3的两个生物反应器,经过一个冬天的现场低温细菌驯化连续培养试验,结果表明细菌活性保持较好,为新疆低温环境保持细菌活性和低温细菌连续培养提供了依据。
Comparison tests were conducted on the column leaching with bacteria, H2O2 and H2SO4 for some low-grade sandstone-type uranium deposits sampled from Xinjiang Province by using Acidothiobacillus ferrooxidans （A f） obtained from domestication and cultivation of leach liquor after absorption. The test results showed that ： A f obtained from domestication and cultivation could adapt to leach liquor and presented better activities in 10 g/L H2SO4, and the leaching rates of uranium by A f and H2O2 were 2% -5% higher than that by H2SO4. Two bioreactors with total volume of 15 m^3 were designed and constructed on site and continuous tests on domestication and cultivation of bacteria conducted in winter on site showed that A f could be kept with good activities, which provides effective evidence for the pilot test in the future.
出处
《矿冶工程》
CAS
CSCD
北大核心
2011年第6期6-8,12,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金项目(51154003
51074093)
关键词
细菌浸出
柱浸
砂岩铀矿
铀
低温驯化
嗜酸氧化亚铁硫杆菌
bacteria leaching
column leaching
sandstone-type uranium ore
uranium
low-temperature domestication
Acidothiobacillus ferrooxidans （ A f）
