This tutorial review covers the chemistry of artificial receptors designed to recognize the pertechnetate and perrhenate anions. It focuses on the molecular features that give rise to effective and selective complexation. Specific receptor classes are discussed in the context of available solution-phase and solid-state data with differences between pertechnetate and perrhenate binding behavior being highlighted where appropriate.
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Interactions of perrhenate (ReO) and pertechnetate (TcO) with the uranyl ion (UO) in acetonitrile solution: spectroscopy and theoretical calculations.
Dalton Trans
December 2024
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.
The co-extraction of pertechnetate (TcO) along with the uranyl ion (UO) is a problematic issue that complicates the Plutonium Uranium Reduction EXtraction (PUREX) process for reprocessing spent nuclear fuel. Unfortunately, research on the interactions of TcO with UO is very scarce. This work quantitatively investigated the interactions of TcO and its analog ReO with UO in acetonitrile with 0.
View Article and Find Full Text PDFAntagonistic Effect of Nitrate Conversion on Photocatalytic Reduction of Aqueous Pertechnetate and Perrhenate.
Environ Sci Technol
December 2024
State Key Laboratory of Environment-friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, P. R. China.
Sustainable photocatalysis can effectively reduce the radioactive TcO to less soluble TcO·HO(s), but the reduction efficiency is highly susceptible to coexisting nitrate (NO). Here, we quantitatively investigate photocatalytic remediation conditions for Tc-contaminated water stimulated by the analogue perrhenate (ReO) in the presence of NO, and we elucidate the influence mechanism of NO by in situ characterizations. The interfering NO can compete with Re(VII) for the carbonyl radical (·CO) produced by formic acid (HCOOH) oxidation to generate nitrogen-containing products such as NH, NO, and NO, resulting in the decrease in the Re(VII) reduction ratio.
View Article and Find Full Text PDFSynthesis and Evaluation of the Extraction Efficiency of Pristine Zeolite Na-A to Remove ReO Ions (Surrogate of TcO) from a Simulated Low-Level Waste Solution.
Langmuir
November 2024
Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India.
Article Synopsis
- Zeolite Na-A was synthesized from kaolin using hydrothermal, alkali-fusion, and sonochemical methods, and was characterized through various techniques like XRD and FT-IR to assess its structure and thermal stability.
- The synthesized zeolite was successfully used to extract perrhenate ions from simulated low-level waste solutions, demonstrating an impressive maximum sorption capacity of 926.8 mg/g at pH 11 without needing harmful additives.
- The study established that the sonochemically synthesized zeolite Na-A not only effectively adsorbs ReO ions but also has potential for sustainable applications in nuclear waste management.
Fabricating Porous Alkali-Resistant Resin for Segregation of Perrhenate/Pertechnetate Anions from Wastewater.
Inorg Chem
November 2024
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China.
The elimination of the β-emitting pertechnetate ion (TcO) from highly alkaline tank waste poses a daunting challenge that is of great significance for nuclear safety and environmental protection. Herein, we report a strategy to fabricate an alkaline-stable porous resin (PANPEI-MeCl) that features hyperbranched quaternary amine groups grafted on the surface and confined within the pores of a superhydrophobic polymer matrix synthesized by a one-pot method, exhibiting a clear superiority both in adsorption kinetics and efficiency compared with available commercial anion-exchange resins applying to TcO capture. Notably, the alkaline stability of the resin can be improved by manipulating the length of side chain alkyl groups, and it shows ultrahigh structural integrity and prominent performance toward acid/alkaline soaking, high-temperature calcination procedures, and high doses of ionizing radiation.
View Article and Find Full Text PDFChalcogen Bonding in Selective Recognition and Liquid-Liquid Extraction of Perrhenate.
Chemistry
September 2024
School of Chemical Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata, 700032, India.
Efficient recognition and extraction of hazardous anionic pollutants from water medium is of great significance for environmental concerns, representing a challenging area of research in supramolecular chemistry. In this study, we present, for the first time, a comprehensive demonstration of the ability of chalcogen bonding (ChB) to recognize and remove the ReO from 100 % water medium. The anion recognition ability is well elucidated through solution phase NMR and ITC studies, which clearly reveal the selective binding of ReO over other oxo-anions.
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