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Structure and properties of vanadium(V)-doped hexagonal turbostratic birnessite and its enhanced scavenging of Pb2+ from solutions
Yin, H; Feng, XH; Tan, WF; Koopal, LK; Hu, TD; Zhu, MQ; Liu, F; Hu TD(胡天斗)
2015
发表期刊JOURNAL OF HAZARDOUS MATERIALS
卷号288页码:80-88
摘要Vanadium(V)-doped hexagonal turbostratic bimessites were synthesized and characterized by multiple techniques and were used to remove Pb2+ from aqueous solutions. With increasing V content, the V(V)-doped birnessites have significantly decreased crystallinity, i.e., the thickness of crystals in the c axis decreases from 9.8 nm to similar to 0.7 nm, and the amount of vacancies slightly increases from 0.063 to 0.089. The specific surface areas of these samples increase after doping while the Mn average oxidation sates are almost constant. V has a valence of +5 and tetrahedral symmetry, and exists as oxyanions, including V6O162-, and VO43- on birnessite edge sites by forming monodentate corning-sharing complexes. Pb L-III-edge extended X-ray absorption fine structure (EXAFS) spectra analysis shows that, at low V contents (V/Mn <= 0.07) Pb2+ mainly binds with birnessite on octahedral vacancy and especially edge sites whereas at higher V contents (V/Mn >0.07) more Pb2+ associates with V oxyanions and form vanadinite [Pb-5(VO4)(3)Cl](-)like precipitates. With increasing V(V) content, the Pb2+ binding affinity on the V-doped birnessites significantly increases, ascribing to both the formation of the vanadinite precipitates and decreased particle sizes of birnessite. These results are useful to design environmentally benign materials for treatment of metal-polluted water. (C) 2015 Elsevier B.V. All rights reserved.
文章类型Article
关键词Birnessite Vanadium Pb2+ removal XAFS Oxyanions
学科领域Engineering; Environmental Sciences & Ecology
DOI10.1016/j.jhazmat.2015.01.068
收录类别SCI ; EI
WOS类目Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
WOS记录号WOS:000353097900009
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228303
专题多学科研究中心
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Yin, H,Feng, XH,Tan, WF,et al. Structure and properties of vanadium(V)-doped hexagonal turbostratic birnessite and its enhanced scavenging of Pb2+ from solutions[J]. JOURNAL OF HAZARDOUS MATERIALS,2015,288:80-88.
APA Yin, H.,Feng, XH.,Tan, WF.,Koopal, LK.,Hu, TD.,...&胡天斗.(2015).Structure and properties of vanadium(V)-doped hexagonal turbostratic birnessite and its enhanced scavenging of Pb2+ from solutions.JOURNAL OF HAZARDOUS MATERIALS,288,80-88.
MLA Yin, H,et al."Structure and properties of vanadium(V)-doped hexagonal turbostratic birnessite and its enhanced scavenging of Pb2+ from solutions".JOURNAL OF HAZARDOUS MATERIALS 288(2015):80-88.
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