Fig. 6: Validation of the incidental Fenton-like catalysis toward waste-to-resource recovery. | Nature Communications

Fig. 6: Validation of the incidental Fenton-like catalysis toward waste-to-resource recovery.

From: Incidental iron oxide nanoclusters drive confined Fenton-like detoxification of solid wastes towards sustainable resource recovery

Fig. 6

a Detoxification of fly ash from different MSW incineration plants by incidental Fenton-like catalysis. b The 100-L mechanical mixer for pilot-scale experiments. The right-side figure is the top view of the reaction tank. c Effect of H2O2 concentration on the detoxification efficiency. The control line of 50 ng TEQ kg−1 is derived from a technical specification for pollution control of fly-ash from municipal solid waste incineration in China (HJ 1134-2020). d Comparison of the operating cost of incidental Fenton-like catalysis and traditional thermal disposal processes for fly ash detoxification. The cost of thermal treatment does not contain the cost of pretreatment (i.e., the washing process). e Incidental Fenton-like degradation of different contaminants in various wastes containing iron. Conditions for a: T = 293 ± 1.0 K; pH = 6.0 ± 0.3; [H2O2] = 50 mM; the concentration of fly ash was varied to ensure the same initial TEQ (0.9 ng TEQ). Conditions for c: T = 283 ± 5.0 K; pH = 6.4 ± 0.5; fly ash = 30 ± 1.0 kg; tap water = 66–75 L; [H2O2] = 50 mM. Conditions for e: T = 313 ± 1.0 K; pH = 6.0 ± 0.3; [waste] = 10 g L−1; [H2O2] = 100 mM.

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