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Evaluation of coupled sieve-SPLITT fractionation of coastal sediments
2002 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis, the efforts for establishing and evaluating a coupled sieving-SPLITT fractionation method are presented. This method can be used for dividing bulk sediment samples into different fractions, which then are sampled and analyzed for chemical composition. First the sediment was fractionated by wet sieving, which separates particles due to size only. The finest sieve fraction was further fractionated by SPLITT (split-flow thin cell fractionation), which is a novel hydrodynamic separation technique, which separates particles due to differential settling velocity. Different size and settling rate fractions were then analyzed for chemical composition. It was found that the recovery for this coupled fractionation method was satisfactory (approx. 80%) for most major elements, but needs to be further optimized for organic carbon and nitrogen. The fine fraction portion (<38 micron) constituted more than 70% of the total mass in the sediment fractionated here, which means that a fairly large portion was not fractionated with sieving only. this indicates the importance of using another fractionation method such as the splitt after sieving.

Place, publisher, year, edition, pages
2002.
Keyword [en]
Technology, sieve, sikt, SPLITT, kol, kretslopp, Arktis, tundra, fractionation, fraktionering, geokemi, partiklar, geochemistry, particles
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-51503ISRN: LTU-EX--02/271--SELocal ID: 8b5b4da0-a79a-48fc-9423-e4a4790999c3OAI: oai:DiVA.org:ltu-51503DiVA: diva2:1024865
Subject / course
Student thesis, at least 30 credits
Educational program
Environmental Engineering, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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