CCPortal
DOI10.1021/acs.est.6b03913
X-ray Analyses of Lead Adsorption on the (001), (110), and (012) Hematite Surfaces
Noerpel, Matthew R.1,3; Lee, Sang Soo2; Lenhart, John J.1
发表日期2016-11-15
ISSN0013-936X
卷号50期号:22页码:12283-12291
英文摘要

Predicting the environmental fate of lead relies on a detailed understanding of its coordination to mineral surfaces, which in turn reflects the innate reactivity of the mineral surface. In this research, we investigated fundamental dependencies in lead, adsorption to hematite by coupling extended X-ray absorption fine structure (EXAFS) spectroscopy on hematite particles (10 and 50 nm) with resonant anomalous X-ray reflectivity (RAXR) to single crystals expressing the (001), (012), or (110) crystallographic face. The EXAFS showed that lead adsorbed in a bidentate inner-sphere manner in both edge and corner sharing arrangements on the FeO6 octahedra for both particle sizes. The RAXR measurements confirmed these inner-sphere adsorption modes for all three hematite surfaces and additionally revealed outer-sphere adsorption modes not seen in the EXAFS. Lead uptake was larger and pH dependence was greater for the (012) and (110) surfaces, than the (001) surface, due to their expressing singly- and triply coordinated oxygen atoms the (001) surface lacks. In coupling these two techniques we provide a more detailed and nuanced picture of the coordination of lead to hematite while also providing fundamental insight into the reactivity of hematite.


语种英语
WOS记录号WOS:000388155000026
来源期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/60389
作者单位1.Ohio State Univ, Dept Civil Environm & Geodet Engn, Columbus, OH 43210 USA;
2.Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Argonne, IL 60439 USA;
3.US EPA, 5995 Ctr Hill Ave, Cincinnati, OH 45224 USA
推荐引用方式
GB/T 7714
Noerpel, Matthew R.,Lee, Sang Soo,Lenhart, John J.. X-ray Analyses of Lead Adsorption on the (001), (110), and (012) Hematite Surfaces[J]. 美国环保署,2016,50(22):12283-12291.
APA Noerpel, Matthew R.,Lee, Sang Soo,&Lenhart, John J..(2016).X-ray Analyses of Lead Adsorption on the (001), (110), and (012) Hematite Surfaces.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(22),12283-12291.
MLA Noerpel, Matthew R.,et al."X-ray Analyses of Lead Adsorption on the (001), (110), and (012) Hematite Surfaces".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.22(2016):12283-12291.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Noerpel, Matthew R.]的文章
[Lee, Sang Soo]的文章
[Lenhart, John J.]的文章
百度学术
百度学术中相似的文章
[Noerpel, Matthew R.]的文章
[Lee, Sang Soo]的文章
[Lenhart, John J.]的文章
必应学术
必应学术中相似的文章
[Noerpel, Matthew R.]的文章
[Lee, Sang Soo]的文章
[Lenhart, John J.]的文章
相关权益政策
暂无数据
收藏/分享

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。