DOI: 10.1016/j.watres.2018.04.060
Scopus记录号: 2-s2.0-85046668446
论文题名: Stable isotope insights into the weathering processes of a phosphogypsum disposal area
作者: Papaslioti E.-M. ; Pérez-López R. ; Parviainen A. ; Macías F. ; Delgado-Huertas A. ; Garrido C.J. ; Marchesi C. ; Nieto J.M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 140 起始页码: 344
结束页码: 353
语种: 英语
英文关键词: Huelva estuary
; Isotopic tracers
; Phosphogypsum
; Ternary mixing
; Water source
; Weathering model
Scopus关键词: Estuaries
; Gypsum
; Infiltration
; Isotopes
; Leaching
; Marine pollution
; Mixing
; Restoration
; Estuarine environments
; Geochemical tracer
; Huelva estuary
; Impermeable barriers
; Isotopic tracer
; Phosphogypsum
; Water source
; Weathering process
; Weathering
; brackish water
; calcium sulfate
; phosphoric acid
; stable isotope
; anthropogenic source
; coastal zone
; gypsum
; infiltration
; isotopic analysis
; leachate
; leaching
; morphodynamics
; pile
; quantitative analysis
; stable isotope
; waste disposal
; water resource
; weathering
; Article
; coastal waters
; electric conductivity
; estuary
; industrial production
; leaching
; oxidation reduction potential
; oxidation reduction reaction
; priority journal
; salt marsh
; surface property
; waste water management
; water contamination
; water supply
; weathering
; Andalucia
; Huelva Estuary
; Huelva [Andalucia]
; Spain
英文摘要: Highly acidic phosphogypsum wastes with elevated potential for contaminant leaching are stack-piled near coastal areas worldwide, threatening the adjacent environment. Huge phosphogypsum stacks were disposed directly on the marshes of the Estuary of Huelva (SW Spain) without any impermeable barrier to prevent leaching and thus, contributing to the total contamination of the estuarine environment. According to the previous weathering model, the process water ponded on the surface of the stack, initially used to carry the waste, was thought to be the main washing agent through its infiltration and subsequently the main component of the leachates emerging as the edge outflows. Preliminary restorations have been applied to the site and similar ones are planned for the future considering process water as the only pollution agent. Further investigation to validate the pollution pathway was necessary, thus an evaluation of the relationship between leachates and weathering agents of the stack was carried out using stable isotopes (δ18O, δ2H, and δ34S) as geochemical tracers. Quantification of the contribution of all possible end-members to the phosphogypsum leachates was also conducted using ternary mixing via the stable isotopic tracers. The results ruled out ponded process water as main vector of edge outflow pollution and unveiled a continuous infiltration of estuarine waters to the stack implying that is subjected to an open weathering system. The isotopic tracers revealed a progressive contribution downstream from fluvial to marine signatures in the composition of the edge outflows, depending on the location of each disposal zone within the different estuarine morphodynamic domains. Thus, the current study suggests that the access of intertidal water inside the phosphogypsum stack, for instance through secondary tidal channels, is the main responsible for the weathering of the waste in depth, underlying the necessity for new, more effective restorations plans. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112693
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Instituto Andaluz de Ciencias de la Tierra, CSIC and UGR, Avenida de las Palmeras 4, Armilla, Granada 18100, Spain; Department of Earth Sciences and Research Center on Natural Resources, Health and the Environment, University of Huelva, Campus El Carmen, Huelva, E-21071, Spain; Department of Mineralogy and Petrology, UGR, Avda. Fuentenueva s/n, Granada, E-18002, Spain
Recommended Citation:
Papaslioti E.-M.,Pérez-López R.,Parviainen A.,et al. Stable isotope insights into the weathering processes of a phosphogypsum disposal area[J]. Water Research,2018-01-01,140