摘要
采用中温嗜酸氧化亚铁硫杆菌、喜温嗜酸硫杆菌和高温Ferroplasma属古菌对高砷原生硫化铜矿进行了细菌浸出试验研究。研究结果表明,喜温嗜酸硫杆菌对高砷原生硫化铜矿的浸出效果比中温嗜酸氧化亚铁硫杆菌好。中温菌对砷的耐受性比高温菌高。在高温菌浸出过程中,铜优先于砷溶解,砷主要留在浸渣中;细菌接种量对高砷原生硫化铜矿的浸出有一定的影响,接种量为10%时浸出效果最好。提高温度有利于初始阶段铜的浸出,随着浸出的进行,温度的影响逐渐降低,细菌作用占主导作用。驯化高砷耐受能力的高温菌将成为进一步的研究目标。
Bioleaching of high arsenic-bearing primary copper sulfide ore was investigated using mesophilic acidithiobacillus ferrooxidans（Af）,acidithiobacillus caldus（Ac） and thermophilic bacteria ferroplasma cupricumulans sp nov.The results show that better copper extraction effect can be achieved by acidithiobacillus caldus than by acidithiobacillus ferrooxidans and thermophilic bacteria possess lower arsenic-tolerance ability than mesophilic bacteria.Copper can be dissolved preferentially than arsenic during the bioleaching by thermophilic bacteria,and arsenic remains in the leaching residues.Inoculum size of bacteria has effects on bioleaching of high arsenic-bearing primary copper sulfide ore,and the copper extraction reaches the highest with an inoculum size of 10%.Raising temperature may benefit the copper leaching at the initial stage,yet,this effect decreased along with the leaching process,while the role of bacteria action became gradually predominant.It would be the target for further study to acclimate thermophilic bacteria with high arsenic-tolerance.
出处
《矿冶工程》
CAS
CSCD
北大核心
2011年第3期55-58,共4页
Mining and Metallurgical Engineering
基金
国家重点基础研究发展计划项目(2010CB630905)
高技术研究发展计划重点项目(2007AA060902)
关键词
生物选矿
细菌浸出
原生硫化铜
砷黝铜矿
中温菌
高温菌
biobeneficiation
bacterial leaching
primary copper sulfide
tennantite
mesophilic bacteria
thermophilic bacteria
