Community Research and Development Information Service - CORDIS

Abstract

This study reports on the effect of the stagnation time and the sample volume at the consumers� tap on the concentrations of several elements. Experiments were performed in two private properties, one in Italy and one in The Netherlands.
The water distribution system of the house in Italy is characterised by an old cast iron main, a new polyethene service pipe and a mix of old galvanised steel and polypropene domestic pipes. Iron exceeds the DWD limit due to corrosion of the main tubing and the concentration is independent of the sample volume. Small elevated concentrations of mercury were detected starting 850 ml from the tap, but the source is not discovered. The old galvanised steel pipes release cadmium, lead and zinc and seem to adsorb iron and manganese. Unexpectedly polypropene seem to release nickel. This was not confirmed by static migration experiments according to prEN 12783-1. Taps including the metallic parts in the flexible hoses released cadmium, copper, lead, nickel and zinc. The reduction of the sample volume from successive 500 ml samples to successive 50 ml samples showed a more detailed pattern of the elements in the distribution and revealed that most probably lead-tin solders are present in the supply to the kitchen. The concentrations of cadmium, copper, lead, nickel and zinc in the first three successive 50 ml samples, covering the new tap in the kitchen, increased with the stagnation time.

Additional information

Authors: HOEKSTRA E J, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);PEDRONI V, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);PASSARELLA R, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);TRINCHERINI P R, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);EISENREICH S J, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: EUR 20672 EN/3 (2004), 33 pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9893 Fax: +39 033278 5409 E-mail: jrc-publications-office@ec.europa.eu or Bruxelles (BE) Tel: +32 2 295 76 24 Fax: +32 2 299 63 22
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top