Adjacent lanthanides are among the most challenging elements to separate, to the extent that current separations materials would benefit from transformative improvement. Ordered mesoporous carbon (OMC) materials are excellent candidates, owing to their small mesh size and uniform morphology. Herein, OMC materials were physisorbed with bis-(2-ethylhexyl) phosphoric acid (HDEHP) and sorption of Eu was investigated under static and dynamic conditions. The HDEHP-OMC materials displayed higher distribution coefficients and loading capacities than current state-of-the-art materials. Using a small, unpressurized column, a separation between Eu and Nd was achieved. Based on these experimental results, HDEHP-OMC have shown potential as a solid phase sorbent for chromatographic, intragroup, lanthanide separations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.chroma.2019.02.057 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exposure levels and maternal transfer of emerging organophosphate flame retardants (OPFRs) in pregnant women: Comparison with traditional OPFRs.
Environ Int
September 2024
MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China. Electronic address:
Prenatal exposure to organophosphorus flame retardants (OPFRs) has been linked with adverse effects on reproductive health, and new OPFRs are continually emerging. In this study, emerging OPFRs, such as bis(2-ethylhexyl) phenyl phosphate (BEHPP), triamyl phosphate (TAP), tris(4-tert-butylphenyl) phosphate (T4tBPPP), oxydi-2,1-ethanediyl phosphoric acid tetrakis(2 chloro-1-methylethyl) ester (RDT905), cresyl diphenyl phosphate (CDP), and 2-isopropylphenyl diphenyl phosphate (2IPPDPP), were detected in 84 %, 100 %, 100 %, 52 %, 40 %, and 40 % of 25 decidua samples with average concentrations of 2.36, 6.
View Article and Find Full Text PDFMass balance and economic study of a treatment chain for nickel, cobalt and rare earth elements recovery from Ni-MH batteries.
Environ Technol
August 2024
Institut National de la Recherche Scientifique (Centre Eau Terre Environnement), Université du Québec, Québec, Canada.
The aim of this project is to develop and evaluate the economic performance of a complete process for recovering nickel, cobalt, and rare earths (REEs) from nickel metal hydride (Ni-MH) battery waste. The main elements contained in the battery powder are Ni (523 g/kg), La (58 g/kg), Co (39 g/kg), Zn (21 g/kg), Nd (19 g/kg), Sm (19 g/kg) and Ce (14 g/kg). Metal leaching was carried out with 2 M sulfuric acid, solubilising 100% of Ni, 93% of Co and 94% of REEs.
View Article and Find Full Text PDFElucidation of the extraction of trivalent actinides using the DOHyA-HDEHP system: an experimental and theoretical approach.
Phys Chem Chem Phys
May 2024
Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
A combined solvent system composed of an acidic and a neutral extractant is demonstrated as an effective system for the mutual separation of lanthanides and actinides from nitric acid solutions. The geometry and stability of various possible complexes formed under extraction and stripping conditions in a combined solvent system composed of ,-dioctyl hydroxyacetamide (DOHyA) and bis(2-ethylhexyl)phosphoric acid (HDEHP) in the -dodecane medium were studied both experimentally and theoretically. Experimental observations of the distribution ratios of Am(III) and Eu(III) in the combined solvent system revealed synergistic extraction of trivalent metal ions at all nitric acid concentrations.
View Article and Find Full Text PDFTreatment of Stainless Steel Rinse Waters Using Non-Dispersive Extraction and Strip Dispersion Membrane Technology.
Membranes (Basel)
December 2023
Centro Nacional de Investigaciones Metalurgicas (CSIC), Avda. Gregorio del Amo 8, 28040 Madrid, Spain.
The extraction of Fe(III), Cr(III), and Ni(II) from stainless steel rinse water using non-dispersive extraction and strip dispersion membrane technology was carried out in a microporous hydrophobic hollow-fibre module contactor. The fibres were of polypropylene, whereas the organic extractant DP8R (bis(2-ethylhexyl) phosphoric acid) diluted in ExxsolD100 was used as the carrier phase. The rinse water containing the three elements was passed through the tube side, and the pseudo-emulsion formed by the organic phase of DP8R in Exxol D100 and an acidic strip solution were passed through the shell side in a counter-current operation; thus, a unique hollow fibre module was used for extraction and stripping.
View Article and Find Full Text PDFSynthesis of Polymer-Grafted Carbon Dots Serving as Multifunctional Lubricant Additives with Excellent Tribological Performance and Additional Rust Resistance Function for Steel/Steel Contact.
Langmuir
October 2023
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China.
Poly(bis(2-ethylhexyl) phosphoric) methacrylic anhydride-grafted carbon dots (CD--PEPMA) have been controllably synthesized and used as multifunctional lubricant additives of poly(ethylene glycol) (PEG200). The polymers on the surfaces of CD--PEPMA not only endow them with particularly excellent dispersion stability but also enhance their adsorbability on the steel surface and embedded stability between the rubbing surfaces. Hence, CD--PEPMA as an additive showed outstanding rust resistance and tribological performance.
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!