借助扫描电镜(SEM)、X射线衍射(XRD)、傅里叶转换红外光谱(FTIR)、电感耦合等离子体原子发射光谱(ICP-AES)等方法对其组成和结构进行了分析与表征,同时还对其重金属吸附性能进行了研究。结果表明,A.ferrooxidans LX5休止细胞可在2d内将在FeSO4-H2O体系中0.2mol·L-1Fe2+全部氧化成Fe3+,溶液pH由起始的2.5下降至2.10...
摘要:在K-+缺乏的FeSO4-H2O体系(pH 2.5)中,利用氧化亚铁硫杆菌对亚铁的生物氧化作用,合成了一种新型羟基硫酸高铁矿物Schwertmannite(施氏矿物).借助扫描电镜(SEM)、x射线衍射(XRD)、傅里叶转换红外光谱(FTIR)、电感耦合等离子体原子发射光谱(ICP-AES)等方法对其组成和结构进行了分析与表征,同时还对其重金属吸附性能...
此外,SEM研究表明施威特曼石颗粒多呈典型 的球形海胆结构(Subrteta1.,1999;Dold,2003; J6nssoneta/.,2005;L0aneta/.,2005)或网状结构 (D.ld,2003;SidenkoandSherriff,2005),通常其球直径 为300~500nlTl,同时球表面具有针状毛刺(Bighamet 口z.,1994;Jonssoneta/.,2005;孙红福等,2006). ...
Uranyl coprecipitation with Fe oxide minerals was studied with a combination of XAS, XRD, FTIR spectroscopy, microfluorescence spectroscopy, and SEM (Duff et al., 2002). The EXAFS results showed UVI incorporated into Fe oxides as a uranate (without Oax atoms) until saturation was reached, as...
在K-+缺乏的FeSO4-H2O体系(pH 2.5)中,利用氧化亚铁硫杆菌对亚铁的生物氧化作用,合成了一种新型羟基硫酸高铁矿物Schwertmannite(施氏矿物).借助扫描电镜(SEM),x射线衍射(XRD),傅里叶转换红外光谱(FTIR),电感耦合等离子体原子发射光谱(ICP-AES)等方法对其组成和结构进行了分析与表征,同时还对其重金属吸附性能进行了....
In this study we have investigated the stability of pure SHM and SHM containing 0.92 wt% As(III) under Fe(II) aq -rich (0.4-1.0 mM) anoxic conditions using XRD, SEM, M枚ssbauer and FTIR spectroscopic techniques. Schwertmannite transformation proceeded through an alkalinity-driven pathway ...
The components,structures and surface areas of the minerals were analyzed and characterized by XRD,SEM,Ic and BET. In ad...李浙英南京农业大学资源与环境科学学院梁剑茹南京农业大学资源与环境科学学院柏双友南京农业大学资源与环境科学学院周立祥南京农业大学资源与环境科学学院...
Schwertmannite was characterized by Scanning Electron Microscope (SEM) & Energy Dispersive X-ray micro-analysis (EDX), powder X-ray Diffraction (XRD), LECO, Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) and Fourier Transform InfraRed (FTIR). Schwertmannite effectively moderated pH ...
The work also includes a microscopic study (SEM–EDS) of natural Fe(III) precipitates found in the water column of both lakes. The microscopic study of natural precipitates confirms that schwertmannite constitutes a major control of Fe 3+ concentration in the lakes at pH 3.0, whereas jarosite ...
This research work involved the synthesis of Schwertmannite using neutralization method at room temperature and characterizations by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM) and Transmission Electron Microscopy (TEM). The precipitate produced using neutralization method at...