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Effect of Cr(III) Adsorption on the Dissolution of Boehmite Nanoparticles in Caustic Solution

文献类型：期刊论文

作者Cui, Wenwen5,6,7; Zhang, Xin7; Pearce, Carolyn, I4; Engelhard, Mark H.3; Zhang, Hailin5,6,7; Wang, Yining7; Heald, Steve M.2; Zheng, Shili6; Zhang, Yi6; Clark, Sue B.1,4
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2020-05-19
卷号54期号:10页码:6375-6384
ISSN号0013-936X
DOI10.1021/acs.est.9b07881
英文摘要The incorporation of relatively minor impurity metals onto metal (oxy)hydroxides can strongly impact solubility. In complex highly alkaline multicomponent radioactive tank wastes such as those at the Hanford Nuclear Reservation, tests indicate that the surface area-normalized dissolution rate of boehmite (gamma-AlOOH) nanomaterials is at least an order of magnitude lower than that predicted for the pure phase. Here, we examine the dissolution kinetics of boehmite coated by adsorbed Cr(III), which adheres at saturation coverages as sparse chemisorbed monolayer clusters. Using 40 nm boehmite nanoplates as a model system, temperature-dependent dissolution rates of pure versus Cr(III)-adsorbed boehmite showed that the initial rate for the latter is consistently several times lower, with an apparent activation energy 16 kJ.mol(-1) higher. Although the surface coverage is only around 50%, solution analysis coupled to multimethod solids characterization reveal a phyicochemical armoring effect by adsorbed Cr(III) that substantially reduces the number of dissolution-active sites on particle surfaces. Such findings could help improve kinetics models of boehmite and/or metal ion adsorbed boehmite nanomaterials, ultimately providing a stronger foundation for the development of more robust complex radioactive liquid waste processing strategies.
WOS关键词HEXAVALENT CHROMIUM REMOVAL ; WATER INTERFACE ; WASTE ; PRECIPITATION ; DESORPTION ; GIBBSITE ; GROWTH
资助项目IDREAM (Interfacial Dynamics in Radioactive Environments and Materials), an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE[DE-AC05-76RL0-1830] ; DOE Office of Science[DE-AC02-06CH11357] ; China Scholarship Council
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000537151000048
资助机构IDREAM (Interfacial Dynamics in Radioactive Environments and Materials), an Energy Frontier Research Center - U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES) ; DOE Office of Biological and Environmental Research ; DOE ; DOE Office of Science ; China Scholarship Council
源URL[http://ir.ipe.ac.cn/handle/122111/40947]  
专题中国科学院过程工程研究所
通讯作者Zhang, Xin; Li, Ping; Wang, Zheming; Rosso, Kevin M.
作者单位1.Washington State Univ, Dept Chem, Pullman, WA 99164 USA
2.Argonne Natl Lab, Adv Photon Source, Lemont, IL 60439 USA
3.Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA
4.Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
7.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99354 USA
推荐引用方式
GB/T 7714		 Cui, Wenwen,Zhang, Xin,Pearce, Carolyn, I,et al. Effect of Cr(III) Adsorption on the Dissolution of Boehmite Nanoparticles in Caustic Solution[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2020,54(10):6375-6384.
APA Cui, Wenwen.,Zhang, Xin.,Pearce, Carolyn, I.,Engelhard, Mark H..,Zhang, Hailin.,...&Rosso, Kevin M..(2020).Effect of Cr(III) Adsorption on the Dissolution of Boehmite Nanoparticles in Caustic Solution.ENVIRONMENTAL SCIENCE & TECHNOLOGY,54(10),6375-6384.
MLA Cui, Wenwen,et al."Effect of Cr(III) Adsorption on the Dissolution of Boehmite Nanoparticles in Caustic Solution".ENVIRONMENTAL SCIENCE & TECHNOLOGY 54.10(2020):6375-6384.

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来源：过程工程研究所

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