Saturation states of carbonate minerals in a freshwater-seawater mixing zone of small tropical island’s aquifer

Mohd Harun Abdullah, and Sarva Mangala Praveena , and Ahmad Zaharin Aris, (2010) Saturation states of carbonate minerals in a freshwater-seawater mixing zone of small tropical island’s aquifer. Chinese Journal of Geochemistry, 29 (3). pp. 278-286. ISSN 1000-9426

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Official URL: http://dx.doi.org/10.1007/s11631-010-0457-3

Abstract

Groundwater is a crucial resource on the Manukan Island as it is the only source of freshwater available on the island. The aquifer has deteriorated to a high degree, during the last decade. Nine domestic wells were sampled from March 2006 to January 2007 to probe the hydrochemical components that influence the water quality. Geochemical data on dissolved major constituents in groundwater samples from the Manukan Island revealed the main processes responsible for their geochemical evolution. The results using statistical analyses, graphical method and numerical model output (PHREEQC) showed that the groundwater was chemically highly enriched in Na and Cl, indicative of seawater intrusion into the aquifer as also supported from the Na-Cl signature on the Piper diagram. From the PHREEQC simulation model, calcite, dolomite and aragonite solubility showed positive values of the saturation indices (SI), indicating supersaturation which led to mineral precipitation condition of water by these minerals.

Item Type:Article
Uncontrolled Keywords:Manukan Island, seawater intrusion, hydrochemistry, saturation index
Subjects:T Technology > TD Environmental technology. Sanitary engineering
Divisions:SCHOOL > School of Science and Technology
ID Code:15036
Deposited By:IR Admin
Deposited On:29 Nov 2016 11:30
Last Modified:29 Nov 2016 11:30

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