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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。
Bacterial leaching experiments were carried out on the high-arsenic primary copper sulphide ores using medium temperature acidithiobacillus ferrooxidans, thermophilic Thiobacillus acidithiobacillus and high-temperature archaeal Ferroplasma. The results show that, Thiobacillus thuringiensis Leaching of high-arsenic primary copper sulfide minerals than the temperature of acid Thiobacillus ferrooxidans good. Middle temperature bacteria arsenic tolerance than high temperature bacteria. During the leaching process of high-temperature bacteria, copper was preferentially dissolved in arsenic and arsenic was mainly in leachate. Bacterial inoculation had some effect on the leaching of high-arsenic primary copper sulphide ore, and the leaching effect was the best when the inoculation amount was 10%. Increasing the temperature is conducive to the initial stage of copper leaching, with the leaching carried out, the impact of temperature gradually decreased, the dominant role of bacteria. Domesticated high-arsenic tolerance temperature of bacteria will be further research goals.