| Title | Comparison between heterogeneous and homogeneous solar driven advanced oxidation processes for urban wastewater treatment: Pharmaceuticals removal and toxicity |
| Abstract | The release of toxic contaminant of emerging concern from urban wastewater treatment plants (UWTPs) into the environment calls for more effective (tertiary) treatment methods. In this manuscript, homogeneous solar-driven advanced oxidation processes (AOPs), namely HO/sunlight, solar photo-Fenton (Fe/HO/sunlight) and solar photo-Fenton with ethylenediamine-N,N'-disuccinic acid (EDDS) complex (Fe/HO/EDDS/sunlight) were compared to a new heterogeneous process (supported nitrogen-doped TiO (N-TiO)/sunlight), with the aim of contributing to fill the gap between lab scale tests and full scale applications as well as to provide a sustainable solution for tertiary treatment in small UWTPs. Process efficiency was evaluated in terms of effluent toxicity and degradation of a mixture of three pharmaceuticals (namely carbamazepine (CBZ), diclofenac and trimethoprim), at initial concentration of 200 µg/L each, in deionized water (DW) and real wastewater (WW). Fe/HO/EDDS/sunlight was found to be the most effective process (98% removal of CBZ from WW in 60 min, 5.6 kJ/L as cumulative solar energy per unit of volume). Conventional solar photo Fenton was drastically and negatively affected by water matrix, due to the spontaneous neutral pH and iron precipitation in real WW. Although N-TiO/sunlight process was not so affected by water matrix, it was found to be less efficient (30% removal of CBZ in 180 min, 13.3 kJ/L) than Fe/HO/EDDS/sunlight process. Toxicity values were found to be lower in WW compared to DW matrix. Class weight scores for WW samples showed a toxicity reduction up to the no acute toxicity level for N-TiO/sunlight and Fe/HO/EDDS/sunlight treatments, while HO/sunlight and Fe/HO/sunlight increased the final effluent toxicity up to slightly acute levels. |
| Source | Separation and purification technology (Print) 236, pp. 116249 |
| Keywords | Contaminants of emerging concernPharmaceuticalsPhotocatalysisSolar photo FentonWastewater reuse |
| Journal | Separation and purification technology (Print) |
| Editor | Elsevier, New York ;, Paesi Bassi |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.seppur.2019.116249 |
| Authors | Maniakova, G.; Kowalska, K.; Murgolo, S.; Mascolo, G.; Libralato, G.; Lofrano, G.; Sacco, O.; Guida, M.; Rizzo, L. |
| Text | 414400 2020 10.1016/j.seppur.2019.116249 Scopus 2 s2.0 85074538882 Contaminants of emerging concern Pharmaceuticals Photocatalysis Solar photo Fenton Wastewater reuse Comparison between heterogeneous and homogeneous solar driven advanced oxidation processes for urban wastewater treatment Pharmaceuticals removal and toxicity Maniakova, G.; Kowalska, K.; Murgolo, S.; Mascolo, G.; Libralato, G.; Lofrano, G.; Sacco, O.; Guida, M.; Rizzo, L. Istituto di Ricerca Sulle Acque, Bari; Universita degli Studi di Napoli Federico II; Silesian University of Technology; Universita di Salerno The release of toxic contaminant of emerging concern from urban wastewater treatment plants UWTPs into the environment calls for more effective tertiary treatment methods. In this manuscript, homogeneous solar driven advanced oxidation processes AOPs , namely HO/sunlight, solar photo Fenton Fe/HO/sunlight and solar photo Fenton with ethylenediamine N,N disuccinic acid EDDS complex Fe/HO/EDDS/sunlight were compared to a new heterogeneous process supported nitrogen doped TiO N TiO /sunlight , with the aim of contributing to fill the gap between lab scale tests and full scale applications as well as to provide a sustainable solution for tertiary treatment in small UWTPs. Process efficiency was evaluated in terms of effluent toxicity and degradation of a mixture of three pharmaceuticals namely carbamazepine CBZ , diclofenac and trimethoprim , at initial concentration of 200 µg/L each, in deionized water DW and real wastewater WW . Fe/HO/EDDS/sunlight was found to be the most effective process 98% removal of CBZ from WW in 60 min, 5.6 kJ/L as cumulative solar energy per unit of volume . Conventional solar photo Fenton was drastically and negatively affected by water matrix, due to the spontaneous neutral pH and iron precipitation in real WW. Although N TiO/sunlight process was not so affected by water matrix, it was found to be less efficient 30% removal of CBZ in 180 min, 13.3 kJ/L than Fe/HO/EDDS/sunlight process. Toxicity values were found to be lower in WW compared to DW matrix. Class weight scores for WW samples showed a toxicity reduction up to the no acute toxicity level for N TiO/sunlight and Fe/HO/EDDS/sunlight treatments, while HO/sunlight and Fe/HO/sunlight increased the final effluent toxicity up to slightly acute levels. 236 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85074538882 origin=inward Articolo in rivista Elsevier 1383 5866 Separation and purification technology Print Separation and purification technology Print Separation and purification technology. Print sapia.murgolo MURGOLO SAPIA giuseppe.mascolo MASCOLO GIUSEPPE |
