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Coordination geometry of Zn2+ on hexagonal turbostratic birnessites with different Mn average oxidation states and its stability under acid dissolution
Yin, H; Wang, XP; Qin, ZJ; Ginder-Vogel, M; Zhang, S; Jiang, SQ; Liu, F; Li, SW; Zhang, J; Wang, Y; Zhang J(张静)
2018
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
EISSN1878-7320
Volume65Pages:282-292
SubtypeArticle
AbstractHexagonal turbostratic birnessite, with the characteristics of high contents of vacancies, varying amounts of structural and adsorbed Mn3+, and small particle size, undergoes strong adsorption reactions with trace metal (TM) contaminants. While the interactions of TM, i.e., Zn2+, with birnessite are well understood, the effect of birnessite structural characteristics on the coordination and stability of Zn2+ on the mineral surfaces under proton attack is as yet unclear. In the present study, the effects of a series of synthesized hexagonal turbostratic birnessites with different Mn average oxide states (AOSs) on the coordination geometry of adsorbed Zn2+ and its stability under acidic conditions were investigated. With decreasing Mn AOS, birnessite exhibits smaller particle sizes and thus larger specific surface area, higher amounts of layer Mn3+ and thus longer distances for the first Mn-O and Mn-Mn shells, but a low quantity of available vacancies and thus low adsorption capacity for Zn2+. Zn K-edge EXAFS spectroscopy demonstrates that birnessite with low Mn AOS has smaller adsorption capacity but more tetrahedral Zn (Zn-IV) complexes on vacancies than octahedral (Zn-VI) complexes, and Zn2+ is more unstable under acidic conditions than that adsorbed on birnessite with high Mn AOS. High Zn2+ loading favors the formation of Zn-VI complexes over Zn-IV complexes, and the release of Zn2+ is faster than at low loading. These results will deepen our understanding of the interaction mechanisms of various TMs with natural birnessites, and the stability and thus the potential toxicity of heavy metal pollutants sequestered by engineered nano-sized metal oxide materials. (C) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
KeywordBirnessite Zn2+ EXAFS Coordination Stability
DOI10.1016/j.jes.2017.02.017
WOS KeywordX-RAY-DIFFRACTION ; METAL SORBED BIRNESSITE ; MANGANESE OXIDES ; CRYSTAL-STRUCTURE ; PHYLLOMANGANATE NANOPARTICLES ; ABSORPTION SPECTROSCOPY ; INFRARED-SPECTROSCOPY ; BIOGENIC BIRNESSITE ; NATURAL SPECIATION ; PSEUDOMONAS-PUTIDA
Indexed BySCI ; EI ; MEDLINE
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000427600600028
CSCD IDCSCD:6209144
EI Accession Number20171303490801
MedlineIDMEDLINE:29548399
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/285742
Collection粒子天体物理中心
实验物理中心
多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Yin, H,Wang, XP,Qin, ZJ,et al. Coordination geometry of Zn2+ on hexagonal turbostratic birnessites with different Mn average oxidation states and its stability under acid dissolution[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2018,65:282-292.
APA Yin, H.,Wang, XP.,Qin, ZJ.,Ginder-Vogel, M.,Zhang, S.,...&张静.(2018).Coordination geometry of Zn2+ on hexagonal turbostratic birnessites with different Mn average oxidation states and its stability under acid dissolution.JOURNAL OF ENVIRONMENTAL SCIENCES,65,282-292.
MLA Yin, H,et al."Coordination geometry of Zn2+ on hexagonal turbostratic birnessites with different Mn average oxidation states and its stability under acid dissolution".JOURNAL OF ENVIRONMENTAL SCIENCES 65(2018):282-292.
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