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Lakningsförsök med furubarksflis: en utredning om utsläpp av fenolföreningar samt metallsorption
Mälardalen University, Department of Public Technology.
2007 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
Abstract [en]

The filters used today to purify water are often expensive and the need to find new filter materials is substantial. Studies of pine bark have shown that this is a material that may be used as an alternative to conventional filter materials, such as activated carbon. However, the study of pine bark has shown that a leakage of phenolic compounds may occur when using the material for water purification. Therefore, the purpose of this report is to investigate the release of phenols from pine bark, in order to evaluate the use of pine bark as a filter material. Another assignment is to investigate the amount of metals adsorbed by the filter material. The studies were carried out through three leaching experiments. As leachates, double deionised water and storm water were used. The phenol concentration in the leachate was determined for both double deionised water and storm water. The degree of metal sorption was measured only for the storm water. The measured phenol concentration in the double deionised water was 4.40 mg/L and in the storm water 4.81 mg/L. These concentrations exceed the Canadian guideline value, of 4.0 μg/L, more than a 1000 times. No metal sorption occurred as the metal content of the storm water was too low. Instead a release of metals from the pine bark into the eluate of the storm water occurred. The leaching attempts also resulted in a decline of the pH-values of the two different waters. The pH-values for the double deionised water and the storm water decreased from 7.0 to 4.3 and from 6.0 to 4.2 respectively. A release of phenols was ascertained with a significant difference in concentrations between double deionised water and storm water. Therefore it is not advisable to use pine bark filters for purification of water with low concentrations of metals, as the filter material may release metals into the water under such conditions.

Keywords: pine bark, phenol, filter materials, leaching, metal sorption, toxicity

Nyckelord: furubarksflis, fenol, filtermaterial, lakning, metallsorption, toxicitet

Place, publisher, year, edition, pages
Institutionen för samhällsteknik , 2007. , 26 p.
Keyword [en]
pine bark, phenol, filter materials, leaching, metal sorption, toxicity
Keyword [sv]
furubarksflis, fenol, filtermaterial, lakning, metallsorption, toxicitet
National Category
Other Environmental Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-597OAI: oai:DiVA.org:mdh-597DiVA: diva2:121180
Presentation
2007-11-29, Västerås, 00:00
Uppsok
teknik
Supervisors
Examiners
Available from: 2008-03-17 Created: 2008-03-17

Open Access in DiVA

fulltext(417 kB)1082 downloads
File information
File name FULLTEXT01.pdfFile size 417 kBChecksum MD5
7a37b8c9c02f980eb5edeb38ebbbe709e1d0e9eb80b199e2d29b68e6156624047ce253d7
Type fulltextMimetype application/pdf

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CiteExportLink to record
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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