Effects of oxygen content on gaseous and solid products during molten salt oxidation of cation exchange resins.

Molten salt oxidation (MSO) is an advanced method for waste resins treatment; nevertheless, the research about gas product variations of resins under different stoichiometric air feed coefficient (α) is rare. The optimal working condition of hazardous waste disposal is obtained through thermodynamic equilibrium calculation, and the method to improve the treatment efficiency is found to guide the optimization of the actual experiment. In this paper, Fact Sage was used to calculate the oxidation products of cation exchange resins (CERs) at different temperatures and α, focusing on the similarities and differences through the contents of CO, CH, CO, and SO during the oxidation of CERs, the MSO of CERs, and the theoretical calculation.

Catalytic effect of cesium on the oxidation behavior of cation exchange resins in LiCO-NaCO-KCO melt.

After the treatment of liquid radioactive waste, there is a certain amount of Cs in the waste resin, and these Cs-doped resins are prone to volatilize during the thermal treatment process and cause radionuclide leakage. The molten salt oxidation (MSO) can effectively prevent the volatilization of toxic metal, especially the volatilization of Cs. Under nitrogen and air conditions, it is found that the oxidation behavior between Cs-doped and clean cation exchange resins (CERs) is quite different.

Electrochemical preparation and properties of a Mg-Li-Y alloy co-reduction of Mg(ii) and Y(iii) in chloride melts.

Mg-Li based alloys have been widely used in various fields. However, the widespread use of Mg-Li based alloys were restricted by their poor properties. The addition of rare earth element in Mg-Li can significantly improve the properties of alloys.

A Large Institutional Study on Outcomes and Complications after Transcatheter Closure of a Perimembranous-Type Ventricular Septal Defect in 890 Cases.

Purpose: To investigate the incidence, cause, and prevention of complications associated with interventional therapy for perimembranous ventricular septal defects (pmVSDs).

Methods: A retrospective analysis was performed on 890 patients with pmVSDs after interventional therapy. The complications were then analyzed by electrocardiography and echocardiography during or after interventional therapy.

Electrochemical formation of Mg-Li-Ca alloys by codeposition of Mg, Li and Ca from LiCl-KCl-MgCl2-CaCl2 melts.

This work presents electrochemical formation of Mg-Li-Ca alloys via codeposition of Mg, Li and Ca on a molybdenum electrode in KCl-LiCl-MgCl(2)-CaCl(2) melts at 943 K. Cyclic voltammograms (CVs) showed that the underpotential deposition (UPD) of calcium on pre-deposited magnesium leads to the formation of a liquid Mg-Ca alloy, and the succeeding underpotential deposition of lithium on pre-deposited Mg-Ca alloy leads to the formation of a liquid Mg-Li-Ca solution. Chronopotentiometric measurements indicated that the codepositon of Mg, Li and Ca occurs at current densities more negative than -0.

[Computational study on the electronic absorption transitions for 2,3-diaryl maleic anhydrides].

The electronic absorption transitions for 2, 3-bis (2, 4-dimethylthiophen-3-yl) maleic anhydride were calculated by time-dependent method with 6-31G(d) basis at structures optimized at B3LYP/6-31G(d) level. The S1, S2, and S3 transitions calculated for the open and the closed forms of the compound are 390, 360.5, 339.