IHEP OpenIR  > 多学科研究中心
Zn sorption to biogenic bixbyite-like Mn2O3 produced by Bacillus CUA isolated from soil: XAFS study with constraints on sorption mechanism
Zhang, ZJ; Yin, H; Tan, WF; Koopal, LK; Zheng, LR; Feng, XH; Liu, F; Zheng LR(郑黎荣)
2014
发表期刊CHEMICAL GEOLOGY
卷号389页码:82-90
摘要Although most reported biogenic Mn oxides are hexagonal birnessites, other types of biogenic Mn oxides also commonly occur in the environment. Compared to hexagonal birnessites, the sorption characteristics and the underlying mechanism of adsorption of heavy-metal ions to those of the other biogenic Mn oxides are still rarely addressed. A strain of Mn-oxidizing bacteria isolated from Claypani-Udic Argosols was identified as Bacillus with 16S rRNA sequencing analysis. The bacterial Mn(II) oxidation product is a poorly crystallized bixbyite-like Mn2O3 (alpha-Mn2O3). The maximum adsorption capacities of Zn(II) onto the biogenic Mn oxide at pH 6.00 and pH 4.00 were 663 mmol/kg and 629 mmol/kg, respectively. The complex structure of adsorbed Zn2+ was constrained using Zn EXAFS analysis, combined with structural parameters of the biogenic Mn oxide with alternately arranged regular and distorted MnO6 octahedra obtained through multiple-FEFF fitting of Mn EXAFS data. At a relatively low Zn2+ loading (100 mmol/kg, pH 6.00), Zn2+ adsorbed onto the biogenic Mn oxide with two types of tetrahedrally coordinated complexes, i.e. (1) coordinated with one regular/distorted MnO6 octahedron as a monodentate-mononuclear complex and (2) with two MnO6 octahedra (two regular, two distorted or a regular and a distorted) as a bidentate-binuclear complex. While, at a relatively high Zn2+ loading (556 mmol/kg, pH 4.00; 635 mmol/kg, pH 6.00), two types of octahedrally coordinated complexes are constrained, i.e. (1) coordinated with one regular/distorted MnO6 octahedron as a monodentate-mononuclear complex and (2) with one regular MnO6 octahedron as a bidentate mononuclear complex. This research extends further understanding on the formation of biogenic Mn oxides in the environment and the adsorption mechanism of heavy metals onto low-valence Mn oxides with distorted structures. The application of low valence biogenic Mn oxides to efficiently remove heavy metals from water is also shown to be promising. (C) 2014 Elsevier B.V. All rights reserved.
关键词Biogenic Mn oxide Mn-oxidizing bacteria Bixbyite XAFS Zn2+ adsorption
学科领域Geochemistry & Geophysics
DOI10.1016/j.chemgeo.2014.09.017
收录类别SCI
WOS记录号WOS:000345441900006
引用统计
被引频次:5[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/311005/224883
专题多学科研究中心
推荐引用方式
GB/T 7714
Zhang, ZJ,Yin, H,Tan, WF,et al. Zn sorption to biogenic bixbyite-like Mn2O3 produced by Bacillus CUA isolated from soil: XAFS study with constraints on sorption mechanism[J]. CHEMICAL GEOLOGY,2014,389:82-90.
APA Zhang, ZJ.,Yin, H.,Tan, WF.,Koopal, LK.,Zheng, LR.,...&郑黎荣.(2014).Zn sorption to biogenic bixbyite-like Mn2O3 produced by Bacillus CUA isolated from soil: XAFS study with constraints on sorption mechanism.CHEMICAL GEOLOGY,389,82-90.
MLA Zhang, ZJ,et al."Zn sorption to biogenic bixbyite-like Mn2O3 produced by Bacillus CUA isolated from soil: XAFS study with constraints on sorption mechanism".CHEMICAL GEOLOGY 389(2014):82-90.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
10774.pdf(2035KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Zhang, ZJ]的文章
[Yin, H]的文章
[Tan, WF]的文章
百度学术
百度学术中相似的文章
[Zhang, ZJ]的文章
[Yin, H]的文章
[Tan, WF]的文章
必应学术
必应学术中相似的文章
[Zhang, ZJ]的文章
[Yin, H]的文章
[Tan, WF]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。