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Vogel, Lisa, 2015. Spreading of persistent organic pollutants from fiber bank sediments. Second cycle, A2E. Uppsala: SLU, Dept. of Aquatic Sciences and Assessment

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Abstract

Discharge of untreated wastewater from paper and pulp industries have led to large environmental impacts on the coastal sediments in Västernorrland, Sweden. Dissolved fibers caused the formation of large fiber banks and fiber influenced sediment areas, which proved to be highly affected by contamination with persistent organic pollutants (POPs). Concentrations of hexachlorobenzene (HCB), 21 polychlorinated biphenyls (PCB) congeners and 6 substances of the dichlorodiphenyltrichloroethane(DDT) group were determined in sediment, pore water (extracted with polyoxymethylene (POM) strips) and two benthic biota species (Marenzelleria ssp., Saduria entomon). Contaminants were extracted using Soxhlet(sediment), shaking with acetone:n-hexane (POM) and cold column extraction(biota). Multilayer clean-up columns were used for sediment and biota, before instrumental analysis with GC-MS/MS.
Several sediment samples were classified with very high contamination levels for HCB and PCB7, which is an indicator value of the seven most common PCBs in nature. Different contaminant distribution patterns at the investigated sites indicated that contaminant composition varied at different local sources. Pore water concentrations
were higher for less hydrophobic contaminant groups (HCB, DDT and its derivates (DDX)). Sorption (log Kd) increased significantly with increasing hydrophobicity (log Kow) and was significantly higher in fiber bank sediments than in fiber rich sediments and less affected sediments. Bioaccumulation, measured with biota-sediment-accumulation factors (BSAF), seemed to have a bell-shaped distribution for Marenzelleria BSAFs when related to contaminant hydrophobicity; however, results observed were not significant. For Saduria entomon, bioaccumulation increased linearly with increasing contaminant hydrophobicity. Significant positive correlations between contaminant concentrations in biota and sediment for pore water was observed between concentrations in Marenzelleria on a lipid weight basis and concentrations in sediment on a dry weight basis.

Main title:Spreading of persistent organic pollutants from fiber bank sediments
Authors:Vogel, Lisa
Supervisor:Josefsson, Sarah
Examiner:Wiberg, Karin
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2015
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:NM025 EnvEuro - European Master in Environmental Science 120 HEC
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Keywords:persistent organic pollutants, PCB, DDT, HCB, fiber bank, paper and pulp, POM, log Kd, bioaccumulation, pore water concentration, Marenzelleria spp., Saduria entomon
URN:NBN:urn:nbn:se:slu:epsilon-s-5021
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-5021
Subjects:Water resources and management
Chemistry
Language:English
Deposited On:15 Dec 2015 14:30
Metadata Last Modified:15 Dec 2015 14:36

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