Ylva Persson
Umeå University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Ylva Persson.
Chemosphere | 2008
Ylva Persson; Kristian Hemström; Lars Öberg; Mats Tysklind; Anja Enell
An equilibrium and recirculation column test for hydrophobic organic chemicals (ER-H test) was used to study the leaching behaviour of chlorophenols (CPs), polychlorinated diphenyl ethers (PCDEs), polychlorinated dibenzofurans (PCDFs) and polychlorinated dibenzo-p-dioxins (PCDDs) from contaminated soil. A 50% increase in the pore water velocity was shown to have little or no effect on the mobility of CPs, PCDEs, PCDFs and PCDDs. The standard deviations of truly dissolved compounds, CPs, were between 19% and 65% between the tests. However, the repeatability of the ER-H test decreased with increases in the hydrophobicity of the studied compounds; the standard deviations for PCDEs, PCDFs and PCDDs ranged from 53% to 110%, 57% to 77% and 110% to 130%, respectively. The influence of colloids on the release of these compounds was also examined. Up to 30% of the CPs in the soil were leached, of which 1-3% were associated with colloids. The PCDEs, PCDFs and PCDDs were found to be preferably associated with the particulate fraction of the leachate, and less than 0.2% of these compounds were mobilised.
Environmental Toxicology and Chemistry | 2007
Malin L. Nording; Michael S. Denison; David Baston; Ylva Persson; Erik Spinnel; Peter Haglund
The chemically activated luciferase expression assay, the chemically activated fluorescence expression assay, and the enzyme-linked immunosorbent assay (ELISA) are all bioanalytical methods that have been used for the detection and quantification of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). However, no comparisons of the results obtained by these three methods have been published analyzing identical replicates of purified sample extracts. Therefore, we have evaluated the performance of each of these methods for analyzing PCDD/Fs in aliquots of extracts from aged-contaminated soil samples and compared the results with those obtained by gas chromatography/high-resolution mass spectrometry (GC/HRMS). The quantitative performance was assessed and the effects of sample purification and data interpretation on the quality of the bioassay results were investigated. Results from the bioanalytical techniques were, in principle, not significantly different from each other or from the GC/HRMS data (p = 0.05). Furthermore, properly used, all of the bioanalytical techniques examined were found to be sufficiently sensitive, selective, and accurate to be used in connection with soil remediation activities when aiming at the remediation goal recommended by the U.S. Environmental Protection Agency (i.e., <1000 pg toxic equivalency/g). However, a site-specific correction factor should be applied with the use of the ELISA to account for differences between the toxic equivalency factors and the ELISA cross-reactivities of the various PCDD/F congeners, which otherwise might significantly underestimate the PCDD/F content.
AMBIO: A Journal of the Human Environment | 2007
Sofia Frankki; Ylva Persson; Lars Öberg; Ulf Skyllberg; Mats Tysklind
Abstract This paper summarizes recent studies on the environmental fate of chloroaromatic compounds in chlorophenol (CP)-contaminated soil and groundwater at Swedish sawmill sites. Relative proportions of CPs, polychlorinated phenoxy phenols (PCPPs), polychlorinated diphenyl ethers (PCDEs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) were determined in preservatives, particulate organic matter (POM), dissolved organic matter (DOM), groundwater, and particles filtered from groundwater. All compound classes were found in the different compartments. The fraction of PCPPs, PCDEs, PCDDs, and PCDFs had increased in the soil samples relative to the proportions in the preservatives. This increase showed correlation with the hydrophobicity, that is, PCDDs had the largest increase. Similar correlation was found between hydrophobicity and the importance of partitioning to POM over DOM. The more water soluble compound group, CP, was found equally distributed between POM and DOM. For PCPPs, PCDEs, PCDDs, and PCDFs, the relative partitioning to POM increased with increased hydrophobicity. Despite the relative partitioning towards POM, compared with DOM, cotransport with DOM and suspended colloidal fractions was found to substantially increase the transport of these compounds in the groundwater samples.
Journal of Hazardous Materials | 2007
Sofia Jonsson; Ylva Persson; Sofia Frankki; Bert van Bavel; Staffan Lundstedt; Peter Haglund; Mats Tysklind
Chemosphere | 2006
Staffan Lundstedt; Ylva Persson; Lars Öberg
Environmental Science & Technology | 2008
Gerard Cornelissen; Karin Wiberg; Dag Broman; Hans Peter H. Arp; Ylva Persson; Kristina Sundqvist; Per Jonsson
Chemosphere | 2007
Ylva Persson; Staffan Lundstedt; Lars Öberg; Mats Tysklind
Environmental Science and Pollution Research | 2008
Ylva Persson; Andrei Shchukarev; Lars Öberg; Mats Tysklind
Analytical and Bioanalytical Chemistry | 2006
Malin L. Nording; Mikaela Nichkova; Erik Spinnel; Ylva Persson; Shirley J. Gee; Bruce D. Hammock; Peter Haglund
Environmental Science & Technology | 2006
Sofia Frankki; Ylva Persson; Mats Tysklind; Ulf Skyllberg