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	Cu(ii) sorption by biogenic birnessite produced by pseudomonas putida strain mnb1: structural differences from abiotic birnessite and its environmental implications
	Liu, Yuwei1; Li, Yan1; Chen, Ning2; Ding, Hongrui1; Zhang, Huiqin1; Liu, Feifei1; Yin, Hui3; Chu, Shengqi4; Wang, Changqiu1; Lu, Anhuai1
刊名	Crystengcomm
	2018-03-14
卷号	20期号:10页码:1361-1374
ISSN号	1466-8033
DOI	10.1039/c7ce02168b
通讯作者	Li, yan(liyan-pku@pku.edu.cn) ; Lu, anhuai(ahlu@pku.edu.cn)
英文摘要	Biogenic birnessite is the most prevalent form of mn-oxide in nature and it plays important roles in controlling the mobility of heavy metals such as cu(ii). this study focuses on the fine mineralogical characteristics of cu(ii)-incorporated biogenic (bio-) birnessite produced by the pseudomonas putida strain mnb1, and discusses the structural stability of cu-binding birnessite. compared to the structural analog, hexagonal (abio-) birnessite, the x-ray diffraction (xrd) patterns of bio-birnessite showed an enlarged interlayer space from 7.33 to similar to 9.17 angstrom. the reduced in-plane crystallinity and increased lattice parameter b were indicated after cu(ii) adsorption. the linear combination fitting of the mn k-edge x-ray absorption near-edge structure (xanes) indicated similar to 13% mn(ii), and only a small amount of mn(iii) was present. the saturated sorption amount of cu(ii) was 0.17 and 0.25 mol cu/mol mn for bio- and abio-birnessite, respectively. by conducting extended x-ray absorption fine structure (exafs) spectroscopic analysis, multiple coordination paths of cu-mn similar to 2.85 angstrom, cu-cu similar to 3.00 angstrom and cu-mn similar to 3.43 angstrom were shown to exist in both bio-and abio-birnessite, showing the diversity of the cu coordination structure. the fitted coordination numbers for these three paths were much larger (with identical debye-waller factors) in bio-birnessite (1.9, 1.9 and 2.5, respectively) compared to abio-birnessite (1.1, 1.1, 1.6), indicating that cu had more surrounding atoms in bio-birnessite. the results indicate that cu sorption by vacant sites, i.e. incorporation into the vacancy (inc species) or adsorption on the vacancy (tcs species), was more dominant for bio-birnessite, which may have benefitted from the larger interlayer space for accommodation of the cu inner-sphere complex and the very low content of structural mn(iii) competing for vacant sites. in turn, the cu inner-sphere complex modified both the layer and interlayer structures of bio-birnessite. in abio-birnessite, cu binds favorably at abundant edge sites as dimers or multinuclear clusters, which contributes to a larger sorption amount. this binding style was depressed in bio-birnessite because the organic ligands released by microbial activity could block the layer edges. theoretically, the structural stability of cu clusters at the edges should be weaker than the tcs and inc species. this work also provides insight into the geochemical behaviors of cu(ii) controlled by widespread biogenic birnessite.
WOS关键词	X-RAY-DIFFRACTION ; ZN ISOTOPIC FRACTIONATION ; HIGH-TEMPERATURE DECOMPOSITION ; ABSORPTION FINE-STRUCTURE ; MANGANESE HYDROUS OXIDES ; METAL SORBED BIRNESSITE ; NA-RICH BIRNESSITE ; HEXAGONAL BIRNESSITE ; XANES SPECTROSCOPY ; MOLECULAR CONTROLS
WOS研究方向	Chemistry ; Crystallography
WOS类目	Chemistry, Multidisciplinary ; Crystallography
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000430582900004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2178119
专题	高能物理研究所
通讯作者	Li, Yan; Lu, Anhuai
作者单位	1.Peking Univ, Sch Earth & Space Sci, Beijing Key Lab Mineral Environm Funct, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China 2.Canadian Light Source, 44 Innovat Blvd, Saskatoon, SK S7N 2V3, Canada 3.Huazhong Agr Univ, Coll Resources & Environm, Minist Agr, Key Lab Arable Land Conservat Middle & Lower Reac, Wuhan 430070, Hubei, Peoples R China 4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yuwei,Li, Yan,Chen, Ning,et al. Cu(ii) sorption by biogenic birnessite produced by pseudomonas putida strain mnb1: structural differences from abiotic birnessite and its environmental implications[J]. Crystengcomm,2018,20(10):1361-1374.
APA	Liu, Yuwei.,Li, Yan.,Chen, Ning.,Ding, Hongrui.,Zhang, Huiqin.,...&Lu, Anhuai.(2018).Cu(ii) sorption by biogenic birnessite produced by pseudomonas putida strain mnb1: structural differences from abiotic birnessite and its environmental implications.Crystengcomm,20(10),1361-1374.
MLA	Liu, Yuwei,et al."Cu(ii) sorption by biogenic birnessite produced by pseudomonas putida strain mnb1: structural differences from abiotic birnessite and its environmental implications".Crystengcomm 20.10(2018):1361-1374.

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