Analysis of pH Dependent Uranium(VI) Sorption to Nanoparticulate Hematite by Flow Field-Flow Fractionation - Inductively Coupled Plasma Mass Spectrometry

详细信息    查看全文

• 作者：Emily K. Lesher ; James F. Ranville ; Bruce D. Honeyman
• 刊名：Environmental Science & Technology
• 出版年：2009
• 出版时间：July 15, 2009
• 年：2009
• 卷：43
• 期：14
• 页码：5403-5409
• 全文大小：240K
• 年卷期：v.43,no.14(July 15, 2009)
• ISSN：1520-5851

文摘

The ability to quantify the amount of metals ions that are present as macromolecular, nanoparticulate, or colloid phases is critical for understanding bioavailability and transport as well as performing risk assessments and remediation strategies. Flow field-flow fractionation-inductively coupled plasma mass spectrometry (Fl FFF-ICP-MS) is a powerful separation tool that has been previously used to characterize colloidal metals in environmental samples. In this study we examine the degree to which Fl FFF-ICP-MS provides quantitative data on uranium speciation by comparing the results to centrifugation followed by filtration. Sorption of uranium to nanoparticulate hematite (60 nm) was examined over the pH range of 3 to 6. Close agreement was found between the two approaches over the pH range.