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Tattersdill, Kristina, 2011. Association of hydrophobic organic contaminants to size fraction of natural humic substances : using ultrafiltration and high-performance liquid chromatography. Second cycle, A2E. Uppsala: SLU, Dept. of Aquatic Sciences and Assessment

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Abstract

Ultrafiltration and high-performance size exclusion chromatography (HPSEC) were used to determine interactions between different size-fractions of natural humic substance and carbofuran, lindane, chlorpyrifos and PCB-105. Ultrafiltration, using filter MWCO size of 1 kDa and 100 kDa, showed an adsorption of pesticide to filter. Chlorpyrifos (1 kDa) had the highest bioconcentration factor on filter (BCF) of 208±4.0. There was an overall trend of loss of pesticide recovery. Lindane had the lowest recovery 62±2.3% at 1 kDa. Fractionation using HPSEC gave different size-fractions of humic substance with recovered pesticide. However, HPLC/MS/MS showed that both carbofuran and chlorpyrifos fastened in the column. This was most likely the case for lindane also, although this could not be tested due to lindane’s volatility. PCB-105 was lost during incubation previous to HPSEC fractionation.

When adding humic substance, there was a decreased adsorption of pesticide to filter (ultrafiltration) and column (HPSEC). Even though no pattern between pesticides and specific size fractions of humic substance could be detected, it is obvious that humic substance alters the behavior of HOC and making them more mobile.

Main title:Association of hydrophobic organic contaminants to size fraction of natural humic substances
Subtitle:using ultrafiltration and high-performance liquid chromatography
Authors:Tattersdill, Kristina
Supervisor:Goedkoop, Willem and Lundqvist, Anna
Examiner:Sonesten, Lars
Series:UNSPECIFIED
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2011
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:Other
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Keywords:humic substance, high-performance size exclusion chromatography, ultrafiltration, pesticide, size fraction
URN:NBN:urn:nbn:se:slu:epsilon-s-483
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-483
Subjects:Water resources and management
Chemistry
Language:English
Deposited On:25 Jul 2011 08:05
Metadata Last Modified:20 Apr 2012 14:21

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