000151607 001__ 151607
000151607 005__ 20250319155217.0
000151607 0247_ $$2doi$$a10.1016/j.jhazmat.2025.137738
000151607 0248_ $$2sideral$$a143220
000151607 037__ $$aART-2025-143220
000151607 041__ $$aeng
000151607 100__ $$aHernández, Mauricio
000151607 245__ $$aNatural attenuation of contamination by hexachlorocyclohexanes in the soils around the Bailín landfill site (Sabiñánigo, Huesca province, NE Spain)
000151607 260__ $$c2025
000151607 5060_ $$aAccess copy available to the general public$$fUnrestricted
000151607 5203_ $$aINQUINOSA company dumped waste from lindane production in Sabiñánigo (Huesca, Spain). Lindane is the γ-isomer of hexachlorocyclohexane (γ-HCH), a persistent organic pollutant listed in the Stockholm Convention in 2009. The uncontrolled dumping at two poorly managed landfills (Sardas and Bailín) has become one of the most serious contamination cases in Europe. In 2014, after discovering the underground migration of liquid HCH towards the Gállego River, more than 400,000 tonnes of contaminated materials were relocated from the old Bailín landfill to a new security cell. During the transfer operations, a small fraction of ∼100–200 kg HCH was dispersed in the area. The aim of this study is to assess the spatio-temporal dynamics of HCH-isomers around the Bailín landfill. Data from five soil sampling campaigns have been used, spanning the period from 2014 to 2022. Notably, HCH concentrations decreased from 170 kg in 2014–2.4 kg 2022, with the highest contamination levels concentrated near the road used by trucks during the removal operations. Several potential sinks for topsoil pollution were identified and their contribution quantified. For instance, the amount of HCH stored in vegetation (< 1 kg) is negligible, as is the downward movement of HCH through the vadose zone into the water table. Surface runoff does not appear to be a significant mode of HCH loss, as it would have occurred rapidly during the relocation operation, likely reaching the Gállego River. Therefore, volatilisation of HCH into the atmosphere and biological degradation are the two primary sinks for HCH in the area.
000151607 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000151607 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000151607 700__ $$aFernández, Jesús
000151607 700__ $$aFontecha, Gustavo
000151607 700__ $$aValladares, Yefrin
000151607 700__ $$0(orcid)0000-0001-7275-9321$$aGómez, Javier$$uUniversidad de Zaragoza
000151607 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Petrología y Geoquímica
000151607 773__ $$g490 (2025), 137738 [10 pp.]$$pJ. hazard. mater.$$tJournal of Hazardous Materials$$x0304-3894
000151607 8564_ $$s15683995$$uhttps://zaguan.unizar.es/record/151607/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-03-01
000151607 8564_ $$s739205$$uhttps://zaguan.unizar.es/record/151607/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2027-03-01
000151607 909CO $$ooai:zaguan.unizar.es:151607$$particulos$$pdriver
000151607 951__ $$a2025-03-19-14:19:01
000151607 980__ $$aARTICLE