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dc.contributor.authorVersteegh JFM
dc.contributor.authorBergers PJM
dc.contributor.authorde Groot AC
dc.date.accessioned2013-06-13T22:30:25
dc.date.issued1991-10-31
dc.identifier714301002
dc.description.abstractCationic quaternary ammonium compounds are used as fabric softeners. DTDMAC, a technical product with an ecotoxicological risk for aquatic organisms, is the most well known. Ecotoxicological risk values have been determined, followed by an agreement to ban the product from fabric softeners. The quaternary ammonium compounds are highly adsorptive for anionic surfactants, particles and sediments in watersystems. This report describes research on occurrence and behaviour of DTDMAC during drinking water production and gives possible risks for public health. DTDMAC occurs in raw surface water (maximum 30 mug/l), in bankfiltrate (maximum 5 mug/l) and in finished drinking water (maximum 4.3 mug/l ; median 1.7 mug/l). The measured concentrations in drinking water do not give risks for public health. The maximum acceptable value, calculated on the basis of literature data is 0.8 mg/kg food or water. On every sampling point only two measurements were carried out, and therefore effects due to the purification processes can only be interpreted qualitatively. In general, a relatively high concentration of DTDMAC can be decreased easily (bottom passage, conventional purification steps) to a few mug's, but the compound cannot be removed completely even by ozone or activated carbon filtration. In surface water the concentrations are much higher than the negligible risk value (0.5 mug/l) for aquatic ecosystems. The actual concentration given in this report give no reason to continue the research into the meaning of DTDMAC for drinking water supplies.<br>
dc.description.sponsorshipDGM/DWB-D
dc.format.extent24 p
dc.language.isonl
dc.publisherRijksinstituut voor Volksgezondheid en Milieu RIVM
dc.relation.ispartofRIVM Rapport 714301002
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/714301002.html
dc.subject14nl
dc.subject91-4nl
dc.subjectdetergentennl
dc.subjectwasverzachtersnl
dc.subjectdrinkwaterzuiveringnl
dc.subjecttoxicologienl
dc.titleHet voorkomen en gedrag van ditalg-dimethyl-ammoniumchloride (DTDMAC) tijdens de drinkwaterproduktienl
dc.title.alternativeThe occurrence and behaviour of ditallow-dimethyl-ammoniumchloride (DTDMAC) during drinking water productionen
dc.typeReport
dc.date.updated2013-06-13T20:30:27Z
html.description.abstractCationic quaternary ammonium compounds are used as fabric softeners. DTDMAC, a technical product with an ecotoxicological risk for aquatic organisms, is the most well known. Ecotoxicological risk values have been determined, followed by an agreement to ban the product from fabric softeners. The quaternary ammonium compounds are highly adsorptive for anionic surfactants, particles and sediments in watersystems. This report describes research on occurrence and behaviour of DTDMAC during drinking water production and gives possible risks for public health. DTDMAC occurs in raw surface water (maximum 30 mug/l), in bankfiltrate (maximum 5 mug/l) and in finished drinking water (maximum 4.3 mug/l ; median 1.7 mug/l). The measured concentrations in drinking water do not give risks for public health. The maximum acceptable value, calculated on the basis of literature data is 0.8 mg/kg food or water. On every sampling point only two measurements were carried out, and therefore effects due to the purification processes can only be interpreted qualitatively. In general, a relatively high concentration of DTDMAC can be decreased easily (bottom passage, conventional purification steps) to a few mug&apos;s, but the compound cannot be removed completely even by ozone or activated carbon filtration. In surface water the concentrations are much higher than the negligible risk value (0.5 mug/l) for aquatic ecosystems. The actual concentration given in this report give no reason to continue the research into the meaning of DTDMAC for drinking water supplies.&lt;br&gt;


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