Improving vanadium extraction from stone coal via combination of blank roasting and bioleaching by ARTP-mutated Bacillus mucilaginosus  

等离子体诱变菌浸出及石煤的空白焙烧相结合提高石煤中钒浸出效果（英文）

作　　者：Ying-bo DONG Yue LIU Hai LIN Chen-jing LIU 董颖博;刘悦;林海;刘陈静(北京科技大学能源与环境工程学院,北京100083;工业典型污染物资源化处理北京市重点实验室,北京100083)

机构地区：[1]School of Energy and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants,Beijing 100083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第4期849-858,共10页中国有色金属学报（英文版）

基　　金：Project(2015ZX07205003)supported by Major Science and Technology Program for Water Pollution Control and Treatment of China

摘　　要：In order to improve leaching efficiency of vanadium from stone coal,the combination of blank roasting and bioleaching using Bacillus mucilaginosus(B.mucilaginosus)mutants was evaluated.The atmospheric and room temperature plasma(ARTP)technique was used to generate B.mucilaginosus mutants.The results showed that a mutant B.mucilaginosus BM-50,after ARTP irradiation for 50 s,had the highest acid production.The total content of the organic acid produced by B.mucilaginosus BM-50 was nearly doubled compared with the wild strain after 2 days.After 20 days,vanadium leaching rate with B.mucilaginosus BM-50 reached 18.2%,which was improved compared with the original bacteria(15.3%).A pretreatment via blank roasting for stone coal further improved the vanadium dissolution by bioleaching,namely,68.3%vanadium was extracted,which was much higher than that without blank roasting.It is shown that bioleaching by bacterial mutants by ARTP irradiation combined with blank roasting has great potential for improving vanadium recovery from low-grade vanadium bearing stone coal.为了提高石煤中钒的浸出效率,采用空白焙烧及微生物浸出相结合的方法,以胶质芽孢杆菌为原始菌,采用等离子体技术对其进行诱变处理。结果表明,培养2天后,照射时间为50s时所得诱变菌B.mucilaginosus BM-50代谢产生的总有机酸含量较原始菌株提高近1倍。含钒石煤浸出20天时,诱变菌B. mucilaginosus BM-50的钒浸出率达到18.2%,相比原始菌的钒浸出率(15.3%)有所提高。空白焙烧预处理可以进一步提高钒浸出效率,浸出20天时,诱变菌B. mucilaginosus BM-50的钒浸出率为68.3%,较未预处理的诱变菌浸出体系的钒浸出率大大提高。研究表明,采用等离子体诱变菌浸出与空白焙烧相结合的方法具有提高低品位石煤钒回收率的巨大潜力。

关 键 词：atmospheric and room temperature plasma(ARTP) Bacillus mucilaginosus vanadium-bearing stone coal blank roasting BIOLEACHING 

分 类 号：TF841.3[冶金工程—有色金属冶金]