Gypsum precipitation/dissolution as an explanation of the decrease of sulphate concentration during seawater intrusion
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http://hdl.handle.net/10045/2120
Title: | Gypsum precipitation/dissolution as an explanation of the decrease of sulphate concentration during seawater intrusion |
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Authors: | Gomis Yagües, Vicente | Boluda Botella, Nuria | Ruiz Beviá, Francisco |
Research Group/s: | Control de Calidad de Aguas. Estudio de la Intrusión Marina |
Center, Department or Service: | Universidad de Alicante. Departamento de Ingeniería Química |
Keywords: | Gypsum | Seawater intrusion | Sulphate | Hydrogeochemistry |
Knowledge Area: | Ingeniería Química |
Issue Date: | 21-Feb-2000 |
Publisher: | Elsevier |
Citation: | GOMIS YAGÜES, Vicente; BOLUDA BOTELLA, Nuria; RUIZ BEVIÁ, Francisco. "Gypsum precipitation/dissolution as an explanation of the decrease of sulphate concentration during seawater intrusion". Journal of Hydrology. Vol. 228, Issues 1-2 (Febr. 2000). ISSN 0022-1694, pp. 48-55 |
Abstract: | The precipitation of gypsum during the intrusion of seawater in a coastal aquifer is shown to be a possible cause of the decrease of the sulphate concentration with respect to the conservative freshwater / seawater mixing observed in many field studies. Results of previously published laboratory column experiments and the application of a multicomponent reactive transport model show that gypsum precipitates during the first stages of seawater intrusion, causing a decrease in sulphate concentration. As the resultant front advances, the water becomes undersaturated with respect to gypsum when the content of seawater <50%. At that point, water samples exhibit a deficit of sulphate of several mmol/L, in the range of the field values reported in papers on intrusion in coastal aquifers. Thus, in addition to bacterial sulphate reduction by organic matter, gypsum precipitation is a possible explanation for the non-conservative behaviour of sulphate during seawater intrusion. |
Sponsor: | This work was supported by “Conselleria de Cultura, Educació i Ciencia de la Generalitat Valenciana” and “Diputación Provincial de Alicante”. |
URI: | http://hdl.handle.net/10045/2120 |
ISSN: | 0022-1694 |
DOI: | 10.1016/S0022-1694(99)00207-3 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/S0022-1694(99)00207-3 |
Link to OCW-UA: | http://ocw.ua.es/es/ingenieria-y-arquitectura/modelizacion-hidrogeoquimica-2009.html |
Appears in Collections: | INV - CAIM - Artículos de Revistas INV - Recursos Hídricos y Desarrollo Sostenible - Artículos de Revistas INV - EQF - Artículos de Revistas |
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File | Description | Size | Format | |
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GYPSUM_SWINTRUSION.PDF | Versión final (acceso restringido) | 225,16 kB | Adobe PDF | Open Request a copy |
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