Table 4 Most successful (highest % organic carbon reduction) lab-scale runs from first AEA wet-oxidation programme13.
From: Fenton and Fenton-like wet oxidation for degradation and destruction of organic radioactive wastes
Waste | Active | Oxidant | Catalyst | pH | Organic carbon reduction |
|---|---|---|---|---|---|
Lewatit DN (cation IER) | N | H2O2 50% 5.1 t m−3 | Fe2+ 4.7 kg m−3 | 2.0 | 99% |
Amberlite IRN150L (mixed IER) | N | H2O2 50% 6.6 t m−3 | Fe2+ 4.0 kg m−3 Cu2+ 1.0 kg m−3 | 4.0 | 96% |
Powdex (mixed IER) | N | H2O2 50% 5.64 t m−3 | Fe2+ 2.4 kg m−3 Cu2+ 0.6 kg m−3 | 4.0 | 95% |
Lewatit/AW500 (3:1 organic: inorganic) | N | H2O2 50% 4.8 t m−3 | Fe2+ 1.0 kg m−3 Cu2+ 1.0 kg m−3 | 3.5 | 88% |
Lewatit/Descalo Y (3:1 organic: inorganic) | N | H2O2 50% 4.8 t m−3 | Fe2+ 1.0 kg m−3 Cu2+ 1.0 kg m−3 | 3.5 | 86% |
SGHWR sludge (semi-cont reaction) | N | H2O2 50% 2.0 t m−3 | None added, present in waste | 3.5 | 93–96% |
Lewatit DN (semi-cont reaction) | N | H2O2 50% 3.6 t m−3 | Fe2+ 1.2 kg m−3 | 2.0 | 95% |
Trawsfynydd resin (Lewatit/AW500) | Y | H2O2 50% 5.0 t m−3 | Fe2+ 1.0 kg m−3 Cu2+ 1.0 kg m−3 | 3.5 | 97% |
Cellulose waste (paper, tissue, cloth) | N | H2O2 50% 1.4 t m−3 | Fe2+ 2.5 kg m−3 Cu2+ 2.5 kg m−3 | 3.0 | 95% |
1% citric acid | N | H2O2 50% 0.044 t m−3 | Fe2+ 0.2 kg m−3 Cu2+ 0.2 kg m−3 | 2–4 | 99% |
1% formic acid | N | H2O2 50% 0.018 t m−3 | Fe2+ 0.1 kg m−3 | 2–3 | 99% |
1% EDTA | N | H2O2 50% 0.05 t m−3 | Fe2+ 0.2 kg m−3 Cu2+ 0.2 kg m−3 | 3–4 | 99% |
Scintillant residue (1% organics) | N | H2O2 50% 0.084 t m−3 | Fe2+ 0.2 kg m−3 Cu2+ 0.2 kg m−3 | 2–3 | 94% |
