Efficient sequestration of radioactive 99TcO4- by a rare 3-fold interlocking cationic metal-organic framework: A combined batch experiments, pair distribution function, and crystallographic investigation

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous 99TcO4− Uptake

“…The removal of ReO 4 − under different pH values were tested to show the fibers' adsorption ability in acidic and alkaline conditions (Figure S18, Supporting Information). At selected pH range (2)(3)(4)(5)(6)(7)(8)(9)(10)(11), the removal efficiencies were high up to 90%. In certain types of nuclear waste streams, the pH values are either highly acidic or alkaline.…”

“…[10] Considering the danger of handling radioactive 99 TcO 4 − in general laboratories, ReO 4 − is usually used as a nonradioactive analog for 99 TcO 4 − . [11] Traditional microspherolitic polymeric anion-exchange resins (e.g., IRA-400, IRA-401 or Purolite-A-520E) have already been applied for 99 TcO 4 − elimination in a practical large-scale treatment process. However, they showed slow adsorption kinetics and limited adsorption capacity due to their high mass transfer resistance and low content of functional groups.…”

A Cu2I2-Based Coordination Framework as the Selective Sensor for Ag+ and the Effective Adsorbent for I2

“…Over the past several decades, environmental pollution has become an important issue of public concern accompanied by the long-term flourishment of modern industries. − Substance abuse in mining, printing, and dyeing processes, etc. has resulted in the discharge of massive pollutants such as heavy metal ions into the natural environment, which brings a significant threat to human beings and living bodies. − For instance, the existence of Ag + in water may cause irreversible argyria and even lead to the liver injury, kidney damage, and epilepsy when an excessive silver ingestion occurs in humans. − Therefore, it is highly essential to design a facile and effective method for the fast recognition of targeted species. At present, though several detecting means, such as atomic absorption spectrometry, gas chromatography, and ion mobility spectrometry, have been developed, they suffer from inconvenience and a high-cost nature. , By contrast, luminescent chemosensors have been in high demand for contaminant monitoring recently, owing to their inexpensiveness, high accuracy, quick response, and excellent selectivity. − Consequently, pursuit of original and appropriate luminous materials for the specific metal sensing is of great importance and high urgency.…”

Hydrolytically Stable Zr-Based Metal–Organic Framework as a Highly Sensitive and Selective Luminescent Sensor of Radionuclides

“…As a new class of hybrid materials assembled from metal nodes and organic linkers, metal–organic frameworks (MOFs) are scientifically compelling in gas storage, separation, sensing, catalysis, and so forth. − Their tunability in terms of chemical composition and structure renders MOFs as promising candidate materials for radionuclide sensing. − Incorporating photoluminescent (PL) metal centers or organic phosphors within the frameworks endows sensing capacities of MOFs toward the target radionuclides via emission alteration of the host. , Furthermore, phosphors can be orderly and spatially distributed in rigid luminescent MOFs, eliminating luminescence quenching induced by agglomeration and boosting the detection sensitivity. , In addition, the feasible in-and-out channels and tailorable binding site of MOFs allow for sensing of target radionuclides with high selectivity. , However, only a few MOFs for sensing of UO 2 2+ have been documented. − Those for detection of the I – anion have been barely reported, and the most relevant cases thus far include Ln 2 Zn­(L) 3 (H 2 O) 4 ]­(NO 3 ) 2 (Ln = Eu or Tb), [Eu 4 (OH) 4 (tcbpp) 2 (H 2 O) 9 ]­Cl 8 , Cd 2.5 (PDA)­(tz) 3 , and Tb­(cpia)­(H 2 O) 2 . − Moreover, the hydrolytic stability, a key parameter of the chemosensor for practical applications under environmentally relevant conditions, was not investigated in most studies. − …”