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dc.contributor.authorVerweij W
dc.contributor.authorvan den Velde-Koerts T
dc.contributor.authorde Boer JLM
dc.contributor.authorMennes W
dc.date.accessioned2017-02-20T06:46:50
dc.date.issued1994-01-31
dc.identifier734301003
dc.description.abstractA survey has been carried out to measure the concentrations of rare earth elements in drinking water and its cources in the Netherlands. Rare earth elements occur in the earth's crust and, by weathering, also in surface water and groundwater. In surface water rare earth elements were found in concentrations up to 1000 ng/L. In drinking water produced from surface water no concentrations above the detection limits were found. In many of the groundwater samples no rare earth elements were found at all. In a few samples, however, high concentrations of up to 30,000 ng/L were measured. No correlation was found between high concentrations and low pH, although this is sometimes suggested in the literature. High concentrations of rare earth elements were only found in phreatic water with low bicarbonate content collected at a relatively low depth. During purification the concentrations decreased to nearly zero at a few pumping stations, but remained high at a few others. The toxicological data on rare earth elements were evaluated, resulting in indicative admissible concentrations. A comparison, showed that at two of the twenty investigated pumping stations one or more indicative admissible concentrations were exceeded. A more detailed assessment of the concentrations of rare earth elements in Dutch drinking water and its sources is recommended.<br>
dc.description.sponsorshipDGM/DWL
dc.format.extent62 p
dc.language.isonl
dc.publisherRijksinstituut voor Volksgezondheid en Milieu RIVM
dc.relation.ispartofRIVM Rapport 734301003
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/734301003.html
dc.subject06nl
dc.subjectdrinkwaternl
dc.subjectgrondwaternl
dc.subjectoppervlaktewaternl
dc.subjectconcentratienl
dc.subjectdrinking wateren
dc.subjectgroundwateren
dc.subjectsurface wateren
dc.subjectconcentrationen
dc.subjectrare earth elementsen
dc.subjectzeldzame aardenen
dc.titleZeldzame aarden in drinkwater en drinkwaterbronnennl
dc.title.alternative[Rare earth elements in drinking water and its sources.]en
dc.typeReport
dc.date.updated2017-02-20T05:46:51Z
html.description.abstractA survey has been carried out to measure the concentrations of rare earth elements in drinking water and its cources in the Netherlands. Rare earth elements occur in the earth&apos;s crust and, by weathering, also in surface water and groundwater. In surface water rare earth elements were found in concentrations up to 1000 ng/L. In drinking water produced from surface water no concentrations above the detection limits were found. In many of the groundwater samples no rare earth elements were found at all. In a few samples, however, high concentrations of up to 30,000 ng/L were measured. No correlation was found between high concentrations and low pH, although this is sometimes suggested in the literature. High concentrations of rare earth elements were only found in phreatic water with low bicarbonate content collected at a relatively low depth. During purification the concentrations decreased to nearly zero at a few pumping stations, but remained high at a few others. The toxicological data on rare earth elements were evaluated, resulting in indicative admissible concentrations. A comparison, showed that at two of the twenty investigated pumping stations one or more indicative admissible concentrations were exceeded. A more detailed assessment of the concentrations of rare earth elements in Dutch drinking water and its sources is recommended.&lt;br&gt;


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