方案摘要
方案下载应用领域 | |
检测样本 | |
检测项目 | |
参考标准 |
It has been shown that starch can effectively stabilize nanoscale magnetite particles, and starch-stabilized magnetite nanoparticles (SMNP) are promising for in situ remediation of arsenic-contaminated soils. However, a molecular level understanding has been lacking. Here, we carried out XAFS studies to bridge this knowledge gap. Fe K-edge XAFS spectra indicated that the Fe–O and Fe–Fe coordination numbers of SMNP were lower than those for bare magnetite particles, and these coordination numbers decreased with increasing starch concentration. The decrease in the average coordination number at elevated stabilizer concentration was attributed to the increase in the surface-to-volume ratio. Arsenic K-edge XAFS spectra indicated that adsorbed arsenate on SMNP consisted primarily of binuclear bidentate (BB) complexes and monodentate mononuclear (MM) complexes. More BB complexes (energetically more favorable) were observed at higher starch concentrations, indicating that SMNP not only offered greater adsorption surface area, but also stronger adsorption affinity toward arsenate.
NanoBrook产品应用-12-ZetaPALS
NanoBrook产品应用-16-ZetaPALS
相关产品
NanoBrook 173Plus多角度粒度分析仪
布鲁克海文高灵敏Zeta电位分析仪ZetaPALS
布鲁克海文Zeta电位分析仪 ZetaPlus
布鲁克海文(Brookhaven)多角度粒度分析仪173Pl
EyeTech 激光光阻粒度粒形分析仪
布鲁克海文 多角度粒度及高灵敏Zeta电位分析仪 Omni
布鲁克海文高灵敏度Zeta电位及粒度分析仪90Plus PALS
布鲁克海文Zeta电位及激光粒度分析仪90Plus Zeta
布鲁克海文激光粒度仪90Plus
布鲁克海文广角动/静态激光散射仪BI-200SM
布鲁克海文多角度激光光散射(绝对分子量测定)仪MwA
布鲁克海文圆盘式离心/沉降粒度仪
布鲁克海文高灵敏在线粒度分析仪NanoDLS
布鲁克海文ACOS实时在线粒度检测系统
高浓度粒度分析仪
关注
拨打电话
留言咨询