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Metoder för att bedöma urlakning av bly från mässing till dricksvatten
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Brass is a material widely used in drinking water applications such as faucets, mixers and fittings. Brass contains small amounts of lead (Pb) which may, under unfavourable circumstances, be released to the drinking water. The parameters which affect this release are many and not fully understood today. Among these parameters are water chemistry, operation time, stagnation time, material composition, product geometry, treatment and processing of the material. The aim of this study is to summarize current knowledge about Pb contamination from brass products to drinking water and to compare three methods for assessment of Pb release; a European material test, a Scandinavian product test and an American product test. This study shows that a product will perform differently depending on the test method, and that the results from a short-term product test are not related to the results in a long term material test. The two product tests proved to give very different results; while all samples passed the Scandinavian product test, no sample passed the American product test. Furthermore, the Scandinavian product test has been proved to be unreliable due to a number of reasons such as low repeatability, inconsistency with current drinking water parametric value and test water which does not represent a worst case. The conclusion is that the choice of test method influences the result and that short-term test cannot be used to predict the outcome of a long term test. The current Scandinavian product approval is not a reliable method for long term testing of products.

Place, publisher, year, edition, pages
2012. , 54 p.
Keyword [en]
Technology
Keyword [sv]
Teknik, bly, mässing, dricksvatten, lead, brass, drinking water
Identifiers
URN: urn:nbn:se:ltu:diva-42193Local ID: 03f494ed-d9a5-4028-8aa9-96250cbaa3e3OAI: oai:DiVA.org:ltu-42193DiVA: diva2:1015410
Subject / course
Student thesis, at least 30 credits
Educational program
Arenaprogrammes (2002-2014)
Examiners
Note
Validerat; 20120703 (anonymous)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

Open Access in DiVA

fulltext(1969 kB)58 downloads
File information
File name FULLTEXT02.pdfFile size 1969 kBChecksum SHA-512
9ab7b3c0cc90af3c85dc05d6259acf25a22190ed7ea03abc5e3ff023963c502f32df2f53e66a1e8e75174e6889c0ecd9e568c5426a9baa1cdaf05191bfa7b611
Type fulltextMimetype application/pdf

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Johansson, Lisen

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf