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...
施氏矿物Schwertmannite的微生物法合成、鉴定及其对重金属的吸附性能 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...
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...
曼石XRD 产生8 个宽峰,其XRD 谱线有很多毛刺, 表明它是一种结晶度较差或是无定形的矿物(Childs P口Z.,1998;Ohnukieta1.,2004;Loaneta1., 2005).其晶格构造沿C 轴方向成管状,管直径约 0.5m,与砷酸盐,亚砷酸盐和铬酸盐的管状结构的 管直径相当(Bighameta1.,1990;Regenspurget ...
Schwertmannite 样品( 孙红福等,2006) 的 XRD 谱图 (图 7 )可 以看 出 ,慢速合成法合成 的样 品 ( MZB ) 对 应的Schwertmannite 的 8 个特征峰 比较 明显,峰的 强度比较 高,与在 山西马 兰煤矿 采集 的天然 样品 (ML—S一2)对应的谱 图非常接近;而快速合成法合成 ...
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....
XRD pattern of the synthetic schwertmannite (Sh) Full size image FTIR analyses of Sh–As(V) are shown in Fig.2. The peak at 825 cm−1was assigned to the As–O stretching vibration of As–O–Fe coordination [28]. Fig. 2 FTIR analyses of Sh–As(V) ...
A dissolution test with 9 natural and synthetic schwertmannite and ferrihydrite samples was performed by reaction with 0.2 M ammonium oxalate at pH 3.0 in the dark. The method was coupled with differential X-ray diffraction (DXRD) to successfully detect schwertmannite at low concentrations in oxidize...
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...