Metakaolin prepared from a natural clay mineral ore of aluminium kaolinite is a promising low cost and high activity aluminosilicate material that has been investigated for studying the sorption behavior of uranium. Here, metakaolin was characterized using X-ray photoelectron spectroscopy (XPS) and the effects of pH, contact time and initial metal ion concentration on its sorption behavior were studied. The sorption process was found to initially be rapid (approximately 60% at time 0 min) but became slower with time; equilibrium was established within 24 h (approximately 80% sorption). The data were applied to study the kinetics of the sorption process. The Langmuir and Dubinin-Radushkevich (D-R) sorption isotherms were used to describe partitioning behavior for the system at room temperature. The binding of metal ions was found to be pH dependent, with optimal sorption occurring at pH 5. The retained metal ions were eluted with 5 mL of 0.1 M HNO(3). Raman spectroscopy and XPS were used to evaluate the sorption mechanism of U(VI).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.aca.2008.10.017 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Preparation and related properties of geopolymer solidified uranium tailings bodies with various fibers and fiber content.
Environ Sci Pollut Res Int
March 2022
School of Resource & Environment and Safety Engineering, University of South China, Hengyang, 421001, China.
Uranium tailing ponds are a potential major source of radioactive pollution. Solidification treatment can control the diffusion and migration of radioactive elements in uranium tailings to safeguard the surrounding ecological environment. A literature review and field investigation were conducted in this study prior to fabricating 11 solidified uranium tailing samples with different proportions of PVA fiber, basalt fiber, metakaolin, and fly ash, and the weight percentage of uranium tailings in the solidified body is 61.
View Article and Find Full Text PDFExperimental study of pore characteristics and radon exhalation of uranium tailing solidified bodies in acidic environments.
Environ Sci Pollut Res Int
April 2021
School of Resource & Environment and Safety Engineering, University of South China, Hengyang, 421001, China.
The pore characteristics and radon exhalation of uranium tailings solidified in an acid environment were investigated in this study. Tailings from the beach of a uranium tailing reservoir in the acid rain area of Central China were selected as samples and solidified with cement, slag powder (GGBS), metakaolin (MK), or slag powder and metakaolin (GM), then immersed in simulated acid rain solution for 60 days. The transverse relaxation time T distribution and porosity of each solidified sample before and after immersion were measured by nuclear magnetic resonance (NMR) and the cumulative radon concentration before and after immersion was measured by a RAD7 radon meter.
View Article and Find Full Text PDFEvaluation of sorption of uranium onto metakaolin using X-ray photoelectron and Raman spectroscopies.
Anal Chim Acta
January 2009
National Center of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Sindh 76080, Pakistan.
Metakaolin prepared from a natural clay mineral ore of aluminium kaolinite is a promising low cost and high activity aluminosilicate material that has been investigated for studying the sorption behavior of uranium. Here, metakaolin was characterized using X-ray photoelectron spectroscopy (XPS) and the effects of pH, contact time and initial metal ion concentration on its sorption behavior were studied. The sorption process was found to initially be rapid (approximately 60% at time 0 min) but became slower with time; equilibrium was established within 24 h (approximately 80% sorption).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!