Incorporation of Pb(ii) into hematite during ferrihydrite transformation

doi:10.1039/c9en01355e

	Incorporation of Pb(ii) into hematite during ferrihydrite transformation
	Lu, Yang 5; Hu, Shiwen 5; Liang, Zheng 1; Zhu, Mengqiang 2; Wang, Zimeng 3; Wang, Xiaoming 4; Liang, Yuzhen 5; Dang, Zhi 5; Shi, Zhenqing 5
刊名	ENVIRONMENTAL SCIENCE-NANO
	2020-03-01
卷号	7 期号:3 页码:829-841
ISSN号	2051-8153
DOI	10.1039/c9en01355e
通讯作者	Shi, Zhenqing(zqshi@scut.edu.cn)
英文摘要	Ferrihydrite is ubiquitous in natural environments, and its transformation significantly influences the fate of heavy metals. Although Pb(ii) adsorption on iron oxides has been extensively studied, there is still a knowledge gap on the fate of Pb during the dynamic processes of iron oxide transformation. In this study, a set of wet chemistry experiments, spherical aberration corrected scanning transmission electron microscopy (Cs-STEM) integrated with energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS) were used to unravel Pb interactions with iron oxides during ferrihydrite transformation processes under abiotic conditions. Wet chemistry experiments, STEM-EDS elemental mapping and line scans, and quantitative analysis suggested that Pb penetrated into hematite nanoparticles during the transformation processes. STEM analysis at sub-nanoscales, XRD fine scans, and XAS analysis provided evidence of Pb incorporation into the crystal structures of hematite nanoparticles, in which Pb distributed along the zone axis and enlarged the lattice distance of hematite. These results advanced our understanding of the dynamic interactions of Pb with iron oxides by offering new perspectives about the critical roles of chemical speciation, nano-scale spatial distribution, and atomic coordination environments in controlling the geochemical dynamics of heavy metals.
资助项目	National Natural Science Foundation of China[41573090] ; Fundamental Research Funds for the Central Universities[2018PY10] ; Natural Science Foundation of Guangdong[2018A030310394]
WOS关键词	ZERO-VALENT IRON ; URANIUM-MINE TAILINGS ; 2-LINE FERRIHYDRITE ; LEAD(II) SORPTION ; HUMIC-ACID ; HIGH PH ; CRYSTALLIZATION ; NANOPARTICLES ; ADSORPTION ; KINETICS
WOS研究方向	Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000522036000006
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Natural Science Foundation of Guangdong
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/26959]
专题	中国科学院广州能源研究所
通讯作者	Shi, Zhenqing
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Wyoming, Dept Ecosyst Sci & Management, Laramie, WY 82071 USA 3.Fudan Univ, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China 4.Huazhong Agr Univ, Key Lab Arable Land Conservat Middle & Lower Reac, Minist Agr & Rural Affairs, Coll Resources & Environm, Wuhan 430070, Peoples R China 5.South China Univ Technol, Key Lab Pollut Control & Ecosyst Restorat Ind Clu, Minist Educ, Sch Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Lu, Yang,Hu, Shiwen,Liang, Zheng,et al. Incorporation of Pb(ii) into hematite during ferrihydrite transformation[J]. ENVIRONMENTAL SCIENCE-NANO,2020,7(3):829-841.
APA	Lu, Yang.,Hu, Shiwen.,Liang, Zheng.,Zhu, Mengqiang.,Wang, Zimeng.,...&Shi, Zhenqing.(2020).Incorporation of Pb(ii) into hematite during ferrihydrite transformation.ENVIRONMENTAL SCIENCE-NANO,7(3),829-841.
MLA	Lu, Yang,et al."Incorporation of Pb(ii) into hematite during ferrihydrite transformation".ENVIRONMENTAL SCIENCE-NANO 7.3(2020):829-841.