Structural Incorporation of Manganese into Goethite and Its Enhancement of Pb(II) Adsorption
Liu, H; Lu, XC; Li, M; Zhang, LJ; Pan, C; Zhang, R; Li, J; Xiang, WL
2018
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
卷号52期号:8页码:4719-4727
文章类型期刊论文
摘要Natural goethite (alpha-FeOOH) commonly accommodates various metal elements by substituting for Fe, which greatly alters the surface reactivity of goethite. This study discloses the enhancement of Mn-substitution for the Pb(2+)adsorption capacity of goethite. The incorporated Mn in the synthesized goethite presents as Mn(III) and causes a slight decrease in the a and c of the unit cell parameters and an observable increase in the b direction due to the Jahn-Teller effect of the Mn(III)O-6 octahedra. With the Mn content increasing, the particle size decreases gradually, and the surface clearly becomes roughened. The Pb2+ adsorption capacity of goethite is observably enhanced by Mn substitution due to the modified surface complexes. And the increased surface-area-normalized adsorption capacity for Mn-substituted goethite indicated that the enhancement of Pb adsorption is not only attributed to the increase of surface area but also to the change of binding complexes. Extended X-ray absorption fine structure (EXAFS) analysis indicates that the binding structures of Pb2+ on goethite presents as edge-sharing complexes with a regular RPb-Fe = 3.31 angstrom. In the case of Mn-goethite, Pb2+ is also bound with the Mn surface site on the edge-sharing complex with a larger RPb-Fe = 3.47 angstrom. The mechanism for enhancing Pb2+ adsorption on Mn-goethite can be interpreted as the preferred Pb2+ binding on the Mn site of Mn-goethite surface. In a summary, the Mn-goethite has great potential for material development in environmental remediation.
关键词Ray-absorption Spectroscopy Mn-substituted Goethite Total Electron Yield Alpha-feooh Iron-oxide Surface Complexation Synthetic Goethite Aluminum Substitution Doped Goethite Probing Depth
DOI10.1021/acs.est.7b05612
收录类别SCI
语种英语
WOS记录号WOS:000430515400026
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29143
专题中科院上海应用物理研究所2011-2018年
作者单位1.Liu, H
2.Lu, XC
3.Li, M
4.Zhang, LJ
5.Pan, C
6.Zhang, R
7.Li, J
8.Xiang, WL
推荐引用方式
GB/T 7714
Liu, H,Lu, XC,Li, M,et al. Structural Incorporation of Manganese into Goethite and Its Enhancement of Pb(II) Adsorption[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(8):4719-4727.
APA Liu, H.,Lu, XC.,Li, M.,Zhang, LJ.,Pan, C.,...&Xiang, WL.(2018).Structural Incorporation of Manganese into Goethite and Its Enhancement of Pb(II) Adsorption.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(8),4719-4727.
MLA Liu, H,et al."Structural Incorporation of Manganese into Goethite and Its Enhancement of Pb(II) Adsorption".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.8(2018):4719-4727.
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