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Changes in molecular weight of humic substances in the Gulf of Bothnia
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
1996 (English)In: Environment International, ISSN 0160-4120, E-ISSN 1873-6750, Vol. 22, no 5, 551-558 p.Article in journal (Refereed) Published
Abstract [en]

Humic substances were isolated in the brackish Gulf of Bothnia utilizing two techniques: ion exchange on DEAE-cellulose and hydrophobic interaction on XAD-8 resin. The salinity of the water resulted in different yields for the two adsorbents. With XAD-8 resin, 30–80% of the organic carbon was isolated, whereas 5–20% was isolated on the DEAE-cellulose. The concentration of total organic carbon was rather constant but the concentration of humic substances decreased with increasing salinity. Gel filtration was used to measure the homogeneity of the humic fraction. Humic substances isolated in December were more homogeneous than those isolated in June, which indicates a degradation during the summer period which might be caused by photolysis or increased microbial degradation during the warm season.

Place, publisher, year, edition, pages
1996. Vol. 22, no 5, 551-558 p.
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Social Sciences Interdisciplinary
Identifiers
URN: urn:nbn:se:liu:diva-30635DOI: 10.1016/0160-4120(96)00051-7Local ID: 16229OAI: oai:DiVA.org:liu-30635DiVA: diva2:251458
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2017-12-13

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Rahm, Lars

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