| Title: | Real-time air concentrations and turbulent fluxes of volatile organic compounds (VOCs) over historic closed landfills to assess their potential environmental impact |
| Author(s): | Manco A; Ciccioli P; Famulari D; Brilli F; Ciccioli P; Tommasi PD; Toscano P; Gioli B; Esposito A; Magliulo V; |
| Address: | "National Research Council, Institute for Agricultural and Forestry Systems in the Mediterranean (CNR-ISAFOM), Piazzale E. Fermi 1, 80055, Portici (NA), Italy. Electronic address: antonio.manco@isafom.cnr.it. National Research Council, Institute of Biological Systems, (CNR-ISB), Area Della Ricerca di Roma, 00015, Monterotondo Scalo, Italy. National Research Council, Institute for Agricultural and Forestry Systems in the Mediterranean (CNR-ISAFOM), Piazzale E. Fermi 1, 80055, Portici (NA), Italy. Institute for Sustainable Plant Protection, National Research Council of Italy (CNR-IPSP), Via Madonna Del Piano 10, 50017, Sesto Fiorentino (Firenze), Italy. Institute of Bioeconomy, National Research Council of Italy (CNR-IBE), Via G. Caproni 8, 50145, Firenze, Italy" |
| DOI: | 10.1016/j.envpol.2022.119748 |
| ISSN/ISBN: | 1873-6424 (Electronic) 0269-7491 (Linking) |
| Abstract: | "For the first time, emission/deposition fluxes of volatile organic compounds (VOCs) and H(2)S from a historic closed landfill site in Southern Italy were determined by Eddy Covariance (EC) using Proton Transfer Reaction Time-of-Flight Mass Spectrometry (PTR-TOF-MS). This was done in two field campaigns of one week performed in July and October 2016, where fluxes of CO(2) and CH(4) were also measured. Many compounds not previously identified in the biogas were detected by PTR-TOF-MS, but only in July some of them produced positive fluxes exceeding the flux limit of detection. Methanol was the most emitted compound with an average flux of 44.20 +/- 4.28 mug m(-2) h(-1), followed by toluene with a mean flux of 18.97 +/- 2.47 mug m(-2) h(-1). Toluene fluxes were 10 times higher than those of benzene, fitting rather well with values previously measured in the biogas. VOCs emission fluxes of monoterpenes and highly reactive arenes did not reflect, however, the biogas composition. This, combined with tiny emissions of VOC oxidation products, suggests that landfill emissions underwent some photochemical degradation before being dispersed in the atmospheric boundary layer (ABL). Deposition fluxes of some VOCs emitted from the sea was also observed in July. No relevant VOC fluxes were instead measured in October, suggesting that temperature was the variable controlling most landfill emission. Albeit small, summer landfill emissions from the investigated site can have an impact on the population living nearby, because they contain or still generate compounds that causing nuisance" |
| Keywords: | *Air Pollutants/analysis Biofuels/analysis Environmental Monitoring/methods Seasons Toluene/analysis *Volatile Organic Compounds/analysis Waste Disposal Facilities Eddy covariance Giugliano Landfill emission Ptr-tof-ms VOC Concentrations VOC Fluxes; |
| Notes: | "MedlineManco, Antonio Ciccioli, Paolo Famulari, Daniela Brilli, Federico Ciccioli, Piero Tommasi, Paul Di Toscano, Piero Gioli, Beniamino Esposito, Andrea Magliulo, Vincenzo eng England 2022/07/23 Environ Pollut. 2022 Sep 15; 309:119748. doi: 10.1016/j.envpol.2022.119748. Epub 2022 Jul 19" |
