scholarly journals Fenton and Fenton-like wet oxidation for degradation and destruction of organic radioactive wastes

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Sam A. Walling ◽  
Wooyong Um ◽  
Claire L. Corkhill ◽  
Neil C. Hyatt
Keyword(s):  
Pilot Plant ◽  
Oxidation Process ◽  
Organic Wastes ◽  
Radioactive Wastes ◽  
Wet Oxidation ◽  
Temperature Oxidation ◽  
Promising Technology ◽  
Waste Production ◽  
Lower Temperature ◽  
Oxidation System

AbstractFenton or Fenton-like oxidation for treatment of organic radioactive wastes is a promising technology with applications to a range of organic wastes. This review details this process; exploring potential challenges, pitfalls and opportunities for industrial usage with radioactive wastes. The application of this process to real radioactive wastes within pilot-plant settings has been documented, with key findings critically assessed in the context of future waste production. Although this oxidation process has not found mainstream success in treatment of radioactive wastes, a lower temperature oxidation system bring certain benefits, specifically for higher volume or problematic organic wastestreams.

The use of catalyst to enhance the wet oxidation process

2007 ◽  
Vol 55 (12) ◽  
pp. 189-193 ◽  
Author(s):  
C. Maugans ◽  
B. Kumfer
Keyword(s):  
Acetic Acid ◽  
Catalytic Activity ◽  
Acrylic Acid ◽  
Oxidation Process ◽  
Wet Oxidation ◽  
Test Results ◽  
Pure Compound ◽  
Spent Caustic

Wet oxidation tests were performed on two pure compound streams: acetic acid and ammonia; and on two wastewater streams: acrylic acid wastewater and sulphide laden spent caustic. Test results showed that Mn/Ce and Pt/TiO2 were effective catalysts that greatly enhanced acetic acid, ammonia and acrylic acid wastewater destruction. However, the Mn/Ce catalyst performance appears to be inhibited by concentrated salts dissolved in solution. This could limit the applicability of this catalyst for the treatment of brackish wastewaters. Zr, Ce and Ce nanoparticles were also shown to exhibit some catalytic activity, however not to the extent of the Mn/Ce and the Pt/TiO2.

scholarly journals HEAT AND EROSION-RESISTANT NANOSTRUCTURED COATINGS FOR GAS TURBINE ENGINES

Aviation ◽  
2013 ◽  
Vol 17 (4) ◽  
pp. 137-144 ◽  
Author(s):  
Aleksandrs Urbahs ◽  
Konstantins Savkovs ◽  
Margarita Urbaha ◽  
Kristine Carjova
Keyword(s):  
Gas Turbine ◽  
Oxidation Process ◽  
Sample Surface ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Functional Coatings ◽  
Temperature Oxidation ◽  
Plasma Sputtering ◽  
Ion Plasma ◽  
Basic Features

This work analyses the characteristics of functional coatings obtained by vacuum ion-plasma sputtering. These coatings have three-layer multiphase structure created as a result of condensing aluminium and titanium according to a certain programme. The article presents the results of investigation into the heat-resistance of ion-plasma coatings based on Ti-Al-N for titanium alloy parts of gas turbine engines. Analysis of the oxidation process between a sample surface and coatings within the range of 500–825 °C was carried out. The basic features of the process of coating destruction under high-temperature oxidation conditions were determined by means of scanning electron microscopy. The results of the tests made it possible to state that the coatings developed are able to operate at temperatures of 600–750 °C.

Temperature Dependence of Wet Oxidation Process Based on VCSEL

2020 ◽  
Vol 47 (7) ◽  
pp. 0701023
Author(s):  
陈磊 Chen Lei ◽  
罗妍 Luo Yan ◽  
冯源 Feng Yuan ◽  
晏长岭 Yan Changling ◽  
范杰 Fan Jie ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Oxidation Process ◽  
Wet Oxidation

Study on Wet Oxidation Process in Vertical Cavity Surface Emitting Laser

2018 ◽  
Vol 39 (12) ◽  
pp. 1714-1721
Author(s):  
李 颖 LI Ying ◽  
周广正 ZHOU Guang-zheng ◽  
兰 天 LAN Tian ◽  
王智勇 WANG Zhi-yong
Keyword(s):  
Oxidation Process ◽  
Cavity Surface ◽  
Wet Oxidation ◽  
Vertical Cavity Surface ◽  
Surface Emitting Laser ◽  
Vertical Cavity

INFLUENCE OF THE CROSSLINK STRUCTURE ON THE ACTIVATION ENERGY CALCULATED UNDER THERMO-OXIDATIVE CONDITIONS

2018 ◽  
Vol 91 (1) ◽  
pp. 205-224 ◽  
Author(s):  
Richard J. Pazur ◽  
T. Mengistu
Keyword(s):  
Activation Energy ◽  
Zinc Oxide ◽  
High Temperature ◽  
Oxidation Process ◽  
Activation Energies ◽  
Structure Stability ◽  
Temperature Oxidation ◽  
Network Chain ◽  
Temperature Activation ◽  
Sulfur Donor

ABSTRACT A series of six carbon black reinforced brominated poly(isobutylene-co-isoprene) (BIIR) compounds has been developed varying only in cure system type: sulfur, sulfur donor, zinc oxide, peroxide, phenolic resin, and ionic. Compounds were aged from room temperature up to 115 °C, and hardness, mechanical properties, and network chain density were measured. Non-Arrhenius behavior was observed due to data curvature from 70 to 85 °C. The oxidation process was adequately described by assigning low (23–85 °C) and high (85–115 °C) temperature regimes. Heterogeneous aging due to diffusion limited oxygen (DLO) occurred for heat aging above 85 °C, and all measured responses except tensile strength were strongly affected, causing lower activation energies. The activation energy for the high temperature oxidation process is in the range of 107 to 133 kJ/mol in the following ascending order: zinc oxide, ionic, sulfur donor, sulfur, peroxide, and resin. The midpoint of the high temperature activation energies is of the same order as the BIIR and poly(isobutylene) elastomers. The low temperature activation energy is in the range of 55–60 kJ/mol and is likely due to a combination of oxidative chain scission (crosslink density loss) and crosslinking recombination (network building) reactions. Apart from the crosslink structure stability, the presence of unsaturation along the polymer chain after vulcanization affects the high temperature activation energy.

CONCENTRATION OF LOW- AND MEDIUM-LEVEL RADIOACTIVE WASTES WITH THREE-STAGE REVERSE OSMOSIS PILOT PLANT

2001 ◽  
Vol 36 (5-6) ◽  
pp. 1117-1127 ◽  
Author(s):  
Andrzej G. Chmielewski ◽  
Marian Harasimowicz ◽  
Bogdan Tyminski ◽  
Grazyna Zakrzewska-Trznadel
Keyword(s):  
Reverse Osmosis ◽  
Pilot Plant ◽  
Radioactive Wastes ◽  
Medium Level
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