Insights into solar photo-Fenton reaction parameters in the oxidation of a sanitary landfill leachate at lab-scale

Journal of Environmental Management
Tânia F C V SilvaVítor J P Vilar

Abstract

This work evaluates the effect of the main photo-Fenton (PF) reaction variables on the treatment of a sanitary landfill leachate collected at the outlet of a leachate treatment plant, which includes aerated lagooning followed by aerated activated sludge and a final coagulation-flocculation step. The PF experiments were performed in a lab-scale compound parabolic collector (CPC) photoreactor using artificial solar radiation. The photocatalytic reaction rate was determined while varying the total dissolved iron concentration (20-100 mg Fe(2+)/L), solution pH (2.0-3.6), operating temperature (10-50 °C), type of acid used for acidification (H2SO4, HCl and H2SO4 + HCl) and UV irradiance (22-68 W/m(2)). This work also tries to elucidate the role of ferric hydroxides, ferric sulphate and ferric chloride species, by taking advantage of ferric speciation diagrams, in the efficiency of the PF reaction when applied to leachate oxidation. The molar fraction of the most photoactive ferric species, FeOH(2+), was linearly correlated with the PF pseudo-first order kinetic constants obtained at different solution pH and temperature values. Ferric ion speciation diagrams also showed that the presence of high amounts of chloride ions negatively a...Continue Reading

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Citations

Apr 8, 2016·Environmental Science and Pollution Research International·Fernanda Gomes de MendonçaRochel Montero Lago
Aug 19, 2016·Environmental Science and Pollution Research International·Sophia TsoumachidouIoannis Poulios
Oct 26, 2016·The Science of the Total Environment·Tânia F C V SilvaVítor J P Vilar
Nov 1, 2016·Environmental Science and Pollution Research International·A M DíezM Pazos
May 22, 2021·Environmental Science and Pollution Research International·Asaad Olabi, Sayiter Yildiz
Jul 31, 2021·Waste Management·Yara L BrasilMíriam C S Amaral

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