摘要
通过NaF驯化获得了耐氟嗜酸性氧化亚铁硫杆菌菌株,在此基础上研究了K^(+)、F-强化生物浸出钒,并考察了生物浸出钒页岩过程中KF·2H_(2)O对细菌菌体吸附特性的影响。结果表明:嗜酸性氧化亚铁硫杆菌通过连续转接方法驯化后,耐氟浓度达到950 mg/L;细菌驯化后对铁离子的吸附以及转运能力增强,铁离子由浸出液转运至细菌内部,有效削弱了Fe钝化阻溶作用,促进了钒的浸出;F-的参与使得云母晶格结构发生破坏,促进了细菌侵蚀过程中钒的释放;KF·2H_(2)O的添加显著提高了细菌在钒页岩矿物表面的吸附能力,从而增强了其对矿物表面的侵蚀作用,浸出30 d后,钒浸出率可达75.55%,比空白组提高29.02个百分点。
A fluoride-tolerant Acidithiobacillus ferrooxidans strain was obtained through NaF acclimatization.Based on this,the K+and F-enhanced bioleaching of vanadium was analyzed.Besides,the effects of KF·2H_(2)O on bacterial biosorption characteristics during the bioleaching process of vanadium shale.The results demonstrate that,after continuous transfer acclimatization,the fluoride tolerance of Acidithiobacillus ferrooxidans reaches up to 950 mg/L.After acclimatization,the bacteria exhibit enhanced adsorption and transport capabilities for iron ions.The iron ions transfer from the leaching solution into the bacteria,effectively mitigating the Fe-induced passivation and dissolution inhibition,thereby promoting vanadium leaching.The presence of F-induces structural disruption of the mica lattice,which facilitates vanadium release during bacterial erosion.Additionally,the incorporation of KF·2H_(2)O significantly improved the bacterial adsorption capacity on the surface of vanadium shale minerals,enhancing their erosion on the mineral substrate.After 30 d of leaching,the vanadium recovery rate reaches 75.55%,representing an increase of 29.02 percentage points compared to the control group.
作者
王越
蔡震雷
张一敏
郑秋实
佘依洹
WANG Yue;CAI Zhenlei;ZHANG Yimin;ZHENG Qiushi;SHE Yihuan(School of Resource and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control,Wuhan 430081,China;Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources,Wuhan 430081,China;Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource,Wuhan 430081,China)
出处
《化工环保》
北大核心
2025年第4期564-570,共7页
Environmental Protection of Chemical Industry
基金
国家自然科学基金面上项目(52174259)。
关键词
钒页岩
耐氟性
吸附
生物浸出
vanadium shale
fluorine resistance
adsorption
bioleaching
作者简介
王越(1998-),女,山西省吕梁市人,硕士生,电话19834255219,电邮wangyue11250224@163.com;通信作者:蔡震雷,电话15271803213,电邮ande559@163.com。
