RT Journal Article T1 Hydrogen fluoride concentrations in ambient air of an urban area based on the emissions of a major phosphogypsum deposit (SW, Europe) A1 Torres Sánchez, Raquel A1 Sánchez-Rodas Navarro, Daniel Alejandro A1 Sánchez de la Campa Verdona, Ana María A1 Rosa Díaz, Jesús de la AB Hydrogen fluoride (HF) is one of the most toxic gaseous compounds in air, the primary anthropogenic source of which is industrial activity, specifically fertilizer and waste. HF concentrations in an urban area (Huelva, SW Spain) related to a nearby major phosphogypsum (PG) depositweremeasured by passive sampling during summer and winter months from 2014 to 2017 and high-resolution sampling during 2017 and 2017–2018 using an HF analyser. An HF geochemical anomalywas found in the PG pondwith average concentrations of up to 19.1 μg/m3, and concentrations of up to 1.6 μg/m3 were exhibited in the nearest urban area. The concentrations were associated with the HF emissions fromthe PG deposit. Emission factorswere calculated by field and laboratory experiments, and the brines exhibited the highest emission factor (2.7 kg/ha day). Several impacts of HF (N0.1 μg/m3) in the citywere recorded throughout the year, occurring at noon in the summer and during fog events in the winter. Consequently, the PG system should be restored to protect the population living in Huelva from the impacts of HF emission. PB Elsevier SN 0048-9697 SN 1879-1026 (electrónico) YR 2021 FD 2021 LK https://hdl.handle.net/10272/24808 UL https://hdl.handle.net/10272/24808 LA eng NO Torres-Sánchez, R., Sánchez-Rodas, D., Sánchez de la Campa, A. M., & de la Rosa, J. D. (2020). Hydrogen fluoride concentrations in ambient air of an urban area based on the emissions of a major phosphogypsum deposit (SW, Europe). In Science of The Total Environment (Vol. 714, p. 136891). Elsevier BV. https://doi.org/10.1016/j.scitotenv.2020.136891 NO This study was supported by the Autonomous Government of Andalusia and Ministry of Economy and Competitiveness of Spain (Project CGL2014-54637-P; BES-2015-071239). DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026