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Evaluating salinity sources of groundwater and implications for sustainable reverse osmosis desalination in coastal North Carolina, USA

dc.contributor.author Vinson, DS
dc.contributor.author Schwartz, HG
dc.contributor.author Dwyer, GS
dc.contributor.author Vengosh, A
dc.date.accessioned 2013-05-14T00:45:36Z
dc.date.issued 2011-08-01
dc.identifier.issn 1431-2174
dc.identifier.uri https://hdl.handle.net/10161/7355
dc.description.abstract The natural and pumping-induced controls on groundwater salinization in the coastal aquifers of North Carolina, USA, and the implications for the performance of a reverse osmosis (RO) desalination plant have been investigated. Since installation of the well field in the Yorktown aquifer in Kill Devil Hills of Dare County during the late 1980s, the groundwater level has declined and salinity of groundwater has increased from ∼1,000 to ∼2,500 mg/L. Geochemical and boron isotope analyses suggest that the salinity increase is derived from an upflow of underlying saline groundwater and not from modern seawater intrusion. In the groundwater of four wells supplying the plant, elevated boron and arsenic concentrations were observed (1.3–1.4 mg/L and 8–53 μg/L, respectively). Major ions are effectively rejected by the RO membrane (96–99% removal), while boron and arsenic are not removed as effectively (16–42% and 54–75%, respectively). In coming decades, the expected rise of salinity will be associated with higher boron content in the groundwater and consequently also in the RO-produced water. In contrast, there is no expectation of an increase in the arsenic content of the salinized groundwater due to the lack of increase of arsenic with depth and salinity in Yorktown aquifer groundwater.
dc.publisher Springer Science and Business Media LLC
dc.relation.ispartof Hydrogeology Journal
dc.relation.isversionof 10.1007/s10040-011-0738-x
dc.subject Coastal aquifers
dc.subject Stable isotopes
dc.subject Arsenic
dc.subject Reverse osmosis desalination
dc.subject USA
dc.title Evaluating salinity sources of groundwater and implications for sustainable reverse osmosis desalination in coastal North Carolina, USA
dc.type Journal article
duke.contributor.id Dwyer, GS|0063357
duke.contributor.id Vengosh, A|0334554
pubs.begin-page 981
pubs.end-page 994
pubs.issue 5
pubs.organisational-group Civil and Environmental Engineering
pubs.organisational-group Duke
pubs.organisational-group Earth and Ocean Sciences
pubs.organisational-group Global Health Institute
pubs.organisational-group Institutes and Provost's Academic Units
pubs.organisational-group Nicholas School of the Environment
pubs.organisational-group Pratt School of Engineering
pubs.organisational-group Staff
pubs.organisational-group University Institutes and Centers
pubs.volume 19
dc.identifier.eissn 1435-0157
duke.contributor.orcid Vengosh, A|0000-0001-8928-0157


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