Nano-Adsorptive Effects Manifested in Arsenite Adsorption Onto the Nano-Sized Goethite
Guo, XJ; Jin, X; Zhao, XY; Yang, Z; Lv, XF; Zhang, J; Qiu, N;张静; Qiu N(裘南)
刊名SCIENCE OF ADVANCED MATERIALS
2014
卷号6期号:4页码:793-802
关键词Nano-Effect Adsorption Arsenite Goethite
学科分类Science & Technology - Other Topics; Materials Science; Physics
DOI10.1166/sam.2014.1769
英文摘要Goethite nanorods were synthesized to investigate the comprehensive nanoscale effects on As(III) sequestration by iron oxyhydroxide nanocrystallines. The specific adsorption-site accessible for As(III) was 12.4 sites/nm(2) on the goethite nanorods, and 6.9 sites/nm2 on the bulk phase of goethite. However, original goethite nanorods showed a weaker As(111) affinity in comparison with the bulk phase. Potent aggregation of nano-sized goethite led to a much slower rate of As(III) adsorption than its bulk relative and a very different profile of adsorption edge from its bulk phase. Surfactant activation of the nano-surface resulted in dramatic increase in both the affinity and the rate of As(III) adsorption onto the nano-sized goethite, as well as a significant improvement in As(III) adsorption over a broad pH range from 3 to 8. Both extended X-ray absorption fine structure (EXAFS) and X-ray photon spectra (XPS) found no As(Ill) oxidation on the surface of nano- or microsized goethite. Two As Fe shells, attributing to a bidentate binuclear and a monodentate surface complex between the As(III) and nano-goethite, fitted very well the experimental data of X-ray absorption fine structure (EXAFS).
收录类别SCI
WOS记录号WOS:000334392600020
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/225364
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Guo, XJ,Jin, X,Zhao, XY,et al. Nano-Adsorptive Effects Manifested in Arsenite Adsorption Onto the Nano-Sized Goethite[J]. SCIENCE OF ADVANCED MATERIALS,2014,6(4):793-802.
APA Guo, XJ.,Jin, X.,Zhao, XY.,Yang, Z.,Lv, XF.,...&裘南.(2014).Nano-Adsorptive Effects Manifested in Arsenite Adsorption Onto the Nano-Sized Goethite.SCIENCE OF ADVANCED MATERIALS,6(4),793-802.
MLA Guo, XJ,et al."Nano-Adsorptive Effects Manifested in Arsenite Adsorption Onto the Nano-Sized Goethite".SCIENCE OF ADVANCED MATERIALS 6.4(2014):793-802.
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