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[80210] Artykuł: Effect of H2O2 sequential dosing in the Fenton process on leachate treatmentCzasopismo: Desalination and Water Treatment Tom: 134, Strony: 310-315ISSN: 1944-3994 Opublikowano: Grudzień 2018 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 20 Pełny tekst DOI Keywords: Fenton reaction  Leachate  Heavy metals  AOP  |
Landfill leachate is infiltration water percolating through the landfill body together with waste ingredients that were washed out and dissolved, and also the products of biochemical reactions that
occur in stored wastes. Leachate produced in this way requires specialised treatment, in which it is necessary to account for variability in leachate volume and chemical composition. Advanced oxidation
processes, in which highly reactive and non-selective •OH free radicals are produced, constitute an alternative to classical pre-treatment options. Tests were conducted on leachate samples collected from
the closed landfill in Barcza in the Świętokrzyskie Province, Poland. Fenton reaction was performed for Fe2+ to H2O2 ratio of 1:10 and pH = 4 (pH was adjusted using H2SO4) for six Fe2+ catalyst doses (50,
100, 150, 200, 250 and 300 mg/L) at the temperature of 20°C ± 1°C. The entire Fe2+ dose was delivered at the beginning of the process. The impact of H2O2 sequential dosing was investigated for four different configurations at Fe2+ to H2O2 ratio of 1:10. A simple mode of linear sequencing and advanced nonlinear dosing mode were used. It was demonstrated that oxidant sequencing while the catalyst dose is kept constant leads to substantial improvement in total organic carbon, chemical oxygen demand and UVA(254) absorbance compared with a conventional Fenton reaction.