000127678 001__ 127678
000127678 005__ 20241125101157.0
000127678 0247_ $$2doi$$a10.1016/j.scitotenv.2023.165293
000127678 0248_ $$2sideral$$a134752
000127678 037__ $$aART-2023-134752
000127678 041__ $$aeng
000127678 100__ $$0(orcid)0000-0002-2698-789X$$aJiménez Beltrán, Jon$$uUniversidad de Zaragoza
000127678 245__ $$aThe genesis of an extremely acidic perched aquifer within roasted pyrite waste in a fully urbanized area (Zaragoza, Spain)
000127678 260__ $$c2023
000127678 5060_ $$aAccess copy available to the general public$$fUnrestricted
000127678 5203_ $$aContaminated groundwater is a serious problem in developed countries. The abandonment of industrial waste may lead to acid drainage affecting groundwater and severely impacting the environment and urban infrastructure. We examined the hydrogeology and hydrochemistry of an urban area in Almozara (Zaragoza, Spain); built over an old industrial zone, with pyrite roasting waste deposits, there were acid drainage problems in underground car parks. Drilling and piezometer construction, and groundwater samples revealed the existence of a perched aquifer within old sulfide mill tailings, where the building basements interrupted groundwater flow, leading to a water stagnation zone that reached extreme acidity values (pH < 2). A groundwater flow reactive transport model was developed using PHAST to reproduce flow and groundwater chemistry, in order to be used as a predictive tool for guiding remediation actions. The model reproduced the measured groundwater chemistry by simulating the kinetically controlled pyrite and portlandite dissolution. The model predicts that an extreme acidity front (pH < 2), coincident with the Fe (III) pyrite oxidation mechanism taking dominance, is propagating by 30 m/year if constant flow is assumed. The incomplete dissolution of residual pyrite (up to 18 % dissolved) predicted by the model indicates that the acid drainage is limited by the flow regime rather than sulfide availability. The installation of additional water collectors between the recharge source and the stagnation zone has been proposed, together with periodic pumping of the stagnation zone. The study findings are expected to serve as a useful background for the assessment of acid drainage in urban areas, since urbanization of old industrial land is rapidly increasing worldwide.
000127678 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2020-114218RA-100
000127678 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000127678 590__ $$a8.2$$b2023
000127678 592__ $$a1.998$$b2023
000127678 591__ $$aENVIRONMENTAL SCIENCES$$b31 / 358 = 0.087$$c2023$$dQ1$$eT1
000127678 593__ $$aEnvironmental Chemistry$$c2023$$dQ1
000127678 593__ $$aWaste Management and Disposal$$c2023$$dQ1
000127678 593__ $$aPollution$$c2023$$dQ1
000127678 593__ $$aEnvironmental Engineering$$c2023$$dQ1
000127678 594__ $$a17.6$$b2023
000127678 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000127678 700__ $$aMarazuela, Miguel Ángel
000127678 700__ $$aBaquedano, Carlos
000127678 700__ $$aMartínez-León, Jorge
000127678 700__ $$0(orcid)0000-0001-8286-4088$$aSanchez Navarro, Jose Ángel$$uUniversidad de Zaragoza
000127678 700__ $$aCruz-Pérez, Noelia
000127678 700__ $$aSantamarta, Juan C.
000127678 700__ $$aGarcía-Gil, Alejandro
000127678 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Petrología y Geoquímica
000127678 7102_ $$12000$$2427$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Externa
000127678 773__ $$g896 (2023), 165293 [14 pp.]$$pSci. total environ.$$tSCIENCE OF THE TOTAL ENVIRONMENT$$x0048-9697
000127678 8564_ $$s7160202$$uhttps://zaguan.unizar.es/record/127678/files/texto_completo.pdf$$yVersión publicada
000127678 8564_ $$s2340123$$uhttps://zaguan.unizar.es/record/127678/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000127678 909CO $$ooai:zaguan.unizar.es:127678$$particulos$$pdriver
000127678 951__ $$a2024-11-22-12:09:43
000127678 980__ $$aARTICLE