Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
In the present paper, ten aqueous samples which contain-different concentrations of REE were collected in south Jiangxi province, and the reflectance spectra and the concentrations of REE were measured by analytical spectral devices (ASD) FieldSpec-3 reflectance spectroscopy and inductively coupled plasma mass spectrometry (ICP-MS), respectively. The results show that the spectra presented mix characteristics of pure water and rare earth oxide. In addition, six diagnostic absorption features caused by REE in visible and near-infrared wavelengths were detected. Then, relative absorption depths of the six absorption wavelength were calculated by the ratio spectra of sample spectra and pure water spectra. Finally, concentrations of total REE of ten samples and relative absorption depths of the six absorption wavelength were selected as two factors, and their relationship was perfectly described using linear regression analysis in which correlation coefficient was up to 96%-97%. The study provides a new method for quantitative estimation of different concentrations of dissolved REE in aqueous media, and strengthens theoretical basis for hyperspectral information extraction of REE.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Primary production by the purple nonsulfur bacterium in an acidic, moderately sulfidic warm spring.
Appl Environ Microbiol
September 2025
School of Earth and Space Exploration, Arizona State University, Tempe, Arizona, USA.
Populations of the acidophilic purple nonsulfur bacterium were identified in two geographically distinct thermal areas in Yellowstone National Park (Wyoming, USA), as confirmed by 16S rRNA gene sequencing and detection of characteristic methoxylated ketocarotenoids. Microcosm-based carbon uptake assays where oxygenic photosynthesis was excluded via addition of 3-(3,4-dichlorophenyl)-1,1-dimethylurea yielded a light-driven dissolved inorganic carbon (DIC) assimilation rate (7 ± 2 mg C g C h) comparable to those of highly productive algal mats in acidic hot springs, suggesting that may be performing photoautotrophy at the time of the assay. Rates of acetate assimilation were more than two orders of magnitude lower than DIC assimilation and did not differ between light and dark treatments, indicating photoheterotrophic use of acetate was not occurring, though photoheterotrophic assimilation of other organic compounds cannot be excluded.
View Article and Find Full Text PDF3D-Printed Array Helical Monolithic Column Chip with Hierarchical Porous Structure for High-Throughput ICP-MS Analysis of Trace Rare-Earth Elements.
Anal Chem
September 2025
Department of Chemistry, Wuhan University, Wuhan 430072, China.
Three-dimensional printing (3DP) technology enables the flexible fabrication of integrated monolithic microextraction chips for high-throughput sample pretreatment. Meanwhile, the extraction performance of 3DP-based channels is largely limited by printer resolution and the commercially available printing materials. In this work, a 3DP array monolithic microextraction chip (AMC) was fabricated by integrating 26-array helical monolithic microextraction channels for sample pretreatment and 52-array gas valves for fluid control.
View Article and Find Full Text PDFHigh-resolution dual-ended readout PET detectors based on 0.5 mm pitch LYSO arrays with various reflectors.
Med Phys
September 2025
Department of Biomedical Engineering, University of California at Davis, Davis, California, USA.
Background: High-resolution and high-sensitivity small-animal positron emission tomography (PET) scanners are essential non-invasive functional imaging tools in preclinical research. To develop small-animal PET scanners with uniform and high spatial resolution across the field-of-view, PET detectors capable of providing good depth-of-interaction (DOI) information are critical. Dual-ended readout detectors based on lutetium-yttrium oxyorthosilicate (LYSO) arrays with fine pitch represent a promising approach, wherein the choice of inter-crystal reflector significantly impacts the detector performance.
View Article and Find Full Text PDFConstruction of chitosan/wurtzite multiple sites on mesoporous halloysite and selective removal of Al(III) from rare earth ions solution: Microcalorimetry investigation.
Int J Biol Macromol
September 2025
School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China; School of Resources and Civil Engineering, GanNan University of Science and Technology, Ganzhou, 341000, China.
Herein, organic/inorganic multiple adsorption sites were constructed on halloysite to intensify the selective adsorption performance of the adsorbent for Al(III) in rare earth solutions. The adsorption heat behavior and thermodynamics of the composite for different ion systems were investigated using microcalorimetry. The results showed that chitosan formed a mesoporous membrane on the acid-treated calcined halloysite (HalH) substrate through a strong electron interaction between the nitrogen atom of the amino group and the oxygen atom of SiO structure on HalH.
View Article and Find Full Text PDFEvolutionary consequences of extreme climate events.
Curr Biol
September 2025
Institute at Brown for Environment and Society, Brown University, Providence, RI, USA.
Extreme climate events, such as storms, droughts or cold waves, wreak havoc on human and natural systems, but they can also catalyze rapid evolutionary change. Because such extreme events have historically been rare and difficult to forecast, studies of their biological impacts have mostly been serendipitous, limiting our understanding of their evolutionary consequences. However, with extreme climate events now increasing in frequency and severity due to human-induced global change, the opportunity - and need - to study their evolutionary consequences has grown.
View Article and Find Full Text PDF