嗜酸氧化亚铁硫杆菌作用下含黄铁矿废石的生物溶解和动力学  

Bio-dissolution and kinetics of pyrite-bearing waste ores in presence of Acidithiobacillus ferrooxidans

作　　者：洪茂鑫 王军[1,2] 杨宝军 刘洋 廖甤 于世超 刘仕统 汤安妮 王炜 邱冠周[1,2] Mao-xin HONG;Jun WANG;Bao-jun YANG;Yang LIU;Rui LIAO;Shi-chao YU;Shi-tong LIU;An-ni TANG;Wei WANG;Guan-zhou QIU(School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,China;Key Laboratory of Biohydrometallurgy,Ministry of Education,Central South University,Changsha 410083,China;South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510655,China)

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083 [2]中南大学生物冶金教育部重点实验室,长沙410083 [3]生态环境部华南环境科学研究所,广州510655

出　　处：《Transactions of Nonferrous Metals Society of China》2024年第7期2342-2353,共12页中国有色金属学报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(Nos.2022YFC2105300,2022YFC2105304,2022YFC2105305);the Innovation-Driven Project of Central South University,China(No.1053320220066)。

摘　　要：使用生物淋洗处理黄铁矿废石,从源头上缓解其产生酸性矿山废水(AMD)的风险。生物淋洗结果显示,在嗜酸氧化亚铁硫杆菌(A.ferrooxidans)的作用下,40天内可以从黄铁矿废石中去除近82%的铁和硫。动力学研究结果表明,废石中黄铁矿的去除主要受化学反应和内扩散控制。X射线衍射(XRD)和X射线光电子能谱(XPS)的结果表明,在A.ferrooxidans细菌介导下,生物源黄钾铁矾能够钝化废石中残余的黄铁矿。对渣样进行二次生物浸出,试验发现溶液pH没有明显下降,且仅有8 mg/L和160mg/L的铁从两个黄铁矿废石渣样中溶出,表明渣样的酸和铁释放能力得到削弱。Bioleaching treatment was used to decontaminate pyrite-bearing waste rocks,mitigating the risk of acid mine drainage(AMD)generation at source.The bioleaching results showed that nearly 82%of Fe and S could be removed from pyrite-bearing waste within 40 d in the presence of Acidithiobacillus ferrooxidans(A.ferrooxidans).Kinetics study showed that the removal of pyrite from waste ore was mainly in the control of the chemical reaction and internal diffusion.The results of X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)indicated that the formed biogenic jarosite could passivate the residual pyrite under the mediation of A.ferrooxidans.Secondary bioleaching experiments on the residual samples revealed no noticeable decrease in solution pH and only 8 and 160 mg/L of iron dissolved from the two residual mine waste samples,respectively,indicating that the acid and iron release capacity of the mine waste samples was weakened.

关 键 词：酸性矿山废水 黄铁矿 生物浸出 矿山废弃物 黄钾铁矾 生物钝化 

分 类 号：TD167[矿业工程—矿山地质测量] X75[环境科学与工程—环境工程] X172