Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Understanding and modelling the diffusion process of low molecular weight substances in polyethylene pipes
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-6071-6241
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.ORCID iD: 0000-0002-5010-5391
2019 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, p. 301-309Article in journal (Refereed) Published
Abstract [en]

Peroxides are widely used as crosslinkers in polyethylene (PE) drinking water pipes. Cross-linked polyethylene (PEX) has better mechanical properties than PE, but peroxide decomposition by-products can migrate from PEX water pipes into the drinking water unless sufficient preventive actions are undertaken. This work systematically examines the migration of tert-Butyl methyl ether (MTBE), a dominating crosslinking by-product from PEX water pipes, into tap water by utilizing both experimental techniques and finite element (FEM) diffusion modeling. The effects of pipe geometry, tap water temperature (23–80 °C), boundary conditions (air or water interface) and degasing (at 180 °C) were considered. The MTBE diffusivity increased strongly with increasing temperature and it was concluded that a desired water quality can be achieved with proper degasing of the PEX pipes. As the FEM simulations were in excellent agreement with the experimental results, the model can accurately predict the MTBE concentration as a function of time, water temperature and PEX pipe geometry, and enable the pipe manufacturers to aid in ensuring desirable drinking water quality.

Place, publisher, year, edition, pages
Elsevier Ltd , 2019. p. 301-309
Keywords [en]
Crosslinked polyethylene, Diffusion coefficient, Diffusion model, Drinking water, PEX pipes, Polymers, Diffusion, Oxidation, Peroxides, Phase interfaces, Polyethylenes, Temperature, Water pipelines, Water piping systems, Water quality, Drinking water pipes, Experimental techniques, Increasing temperatures, Low molecular weight, Peroxide decomposition, Tert-butyl methyl ethers, Potable water, deionized water, peroxide, polyethylene, polymer, tap water, tert butyl methyl ether, byproduct, decomposition, molecular analysis, MTBE, pipe, plastic, pollution incidence, water temperature, Article, biodegradation, concentration (parameter), cross linking, diffusivity, finite element analysis, heat treatment, mass fragmentography, molecular weight, priority journal, process model, simulation
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-252470DOI: 10.1016/j.watres.2019.03.084ISI: 000468253500030Scopus ID: 2-s2.0-85063760634OAI: oai:DiVA.org:kth-252470DiVA, id: diva2:1337460
Note

QC 20190715

Available from: 2019-07-15 Created: 2019-07-15 Last updated: 2019-07-15Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Holder, ShimaHedenqvist, Mikael S.Nilsson, Fritjof

Search in DiVA

By author/editor
Holder, ShimaHedenqvist, Mikael S.Nilsson, Fritjof
By organisation
Polymeric Materials
In the same journal
Water Research
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 74 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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