【摘要】 分别利用氧化亚铁硫杆菌(Thiobacillus ferrooxidans,简称T.f菌)、氧化硫硫杆菌(Thiobacillus thiooxidans,简称T.t菌)及以上两种混合菌对铊矿尾矿进行浸矿实验。实验结果表明:随着浸出时间的增加,各实验组p H不断降低,EC不断升高,Fe2+浓度先降后升;重金属As的浸出效果为:T.f菌>混合菌>T.t菌>空白,Cu的浸出效果为:T.t菌>T.f菌>混合菌>空白,Tl的浸出效果为:混合菌>T.t菌>T.f菌>空白,Zn的浸出效果为:混合菌>T.f菌>T.t菌>空白;单菌和混合菌实验组对重金属的浸出能力依次为:Cu>As>Zn>Cr>Tl>Cd。表明T.f菌和T.t菌的存在将会促进铊尾矿中重金属的溶出,从而将加剧矿区环境污染。更多还原

【Abstract】 Bioleaching of thallium ore tailings was carried out in shake flasks in the presence of Thiobacillus ferrooxidans(T.f),Thiobacillus thiooxidans(T.t),mixed bacterial culture of T.f and T.t,respectively. The results showed that p H of each experimental group decreased continuously,and EC increased constantly,and the concentration of Fe2+ increased firstly and then decreased with the accumulation of bioleaching time. The leaching potential of heavy metals in each experimental group is different,with the extraction potential of As ranking as T.f >mixed bacteria > T.t > blank,the extraction potential of Cu ranking as T.t> T.f > mixed bacteria > blank,the leaching rate of Tl ranking as mixed bacteria >T.t> T.f > blank,and the leaching rate of Zn ranking as mixed bacteria >T.t> T.f > blank. The order of heavy metal bioleaching potential is ranked as Cu>As>Zn>Cr>Tl>Cd. The results indicated that T.f and T.t can promote the leaching potential of heavy metals in the tailings and therefore aggravate the environmental pollution in mining areas.更多还原