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Coordination geometry of Zn2+ on hexagonal turbostratic birnessites with different Mn average oxidation states and its stability under acid dissolution

文献类型：期刊论文

;
作者Yin, H; Wang, XP; Qin, ZJ; Ginder-Vogel, M; Zhang, S; Jiang, SQ; Liu, F; Li, SW; Zhang, J; Wang, Y
刊名JOURNAL OF ENVIRONMENTAL SCIENCES ; JOURNAL OF ENVIRONMENTAL SCIENCES
出版日期2018 ; 2018
卷号65页码:282-292
关键词Birnessite Birnessite Zn2+ EXAFS Coordination Stability Zn2+ EXAFS Coordination Stability
ISSN号1001-0742 ; 1001-0742
DOI10.1016/j.jes.2017.02.017 ; 10.1016/j.jes.2017.02.017
文献子类Article ; Article
英文摘要Hexagonal 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.; Hexagonal 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.
电子版国际标准刊号1878-7320 ; 1878-7320
WOS关键词X-RAY-DIFFRACTION ; X-RAY-DIFFRACTION ; METAL SORBED BIRNESSITE ; MANGANESE OXIDES ; CRYSTAL-STRUCTURE ; PHYLLOMANGANATE NANOPARTICLES ; ABSORPTION SPECTROSCOPY ; INFRARED-SPECTROSCOPY ; BIOGENIC BIRNESSITE ; NATURAL SPECIATION ; PSEUDOMONAS-PUTIDA ; METAL SORBED BIRNESSITE ; MANGANESE OXIDES ; CRYSTAL-STRUCTURE ; PHYLLOMANGANATE NANOPARTICLES ; ABSORPTION SPECTROSCOPY ; INFRARED-SPECTROSCOPY ; BIOGENIC BIRNESSITE ; NATURAL SPECIATION ; PSEUDOMONAS-PUTIDA
WOS研究方向Environmental Sciences & Ecology ; Environmental Sciences & Ecology
语种英语 ; 英语
CSCD记录号CSCD:6209144 ; CSCD:6209144
WOS记录号WOS:000427600600028 ; WOS:000427600600028
源URL[http://ir.ihep.ac.cn/handle/311005/285742]  
专题高能物理研究所_粒子天体物理中心
高能物理研究所_实验物理中心
高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
推荐引用方式
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, 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, JOURNAL OF ENVIRONMENTAL SCIENCES,2018, 2018,65, 65:282-292, 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.

入库方式： OAI收割

来源：高能物理研究所

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