Mass transfer of hydrophobic organic chemicals between siliconesheets and through plant leaves and low-density polyethylene
2016 (English)In: Chemosphere, ISSN 0045-6535, E-ISSN 1879-1298, Vol. 164, 683-690 p.Article in journal (Refereed) Published
Plant leaves play an important role in the fate of hydrophobic organic contaminants (HOCs) in theenvironment. Yet much remains unknown about the permeability of leaves by HOCs. In this pilot studywe measured (i) the kinetics of mass transfer of three polycyclic aromatic hydrocarbons (PAHs) and sixpolychlorinated biphenyls between a spiked and an unspiked sheet of polydimethylsiloxane (PDMS) indirect contact with each other for 24 h and (ii) kinetics of mass transfer of two PAHs through leaves andlow-density polyethylene (LDPE) in a passive dosing experiment by inserting these matrices between thetwo sheets of PDMS for 48 h. The kinetics of mass transfer of ﬂuoranthene between PDMS sheets in directcontact were a factor of 12 slower than those reported in the literature. The kinetics of mass transfer ofﬂuorene and phenanthrene through leaves were within the range of those previously reported for 2,4-dichlorophenoxyacetic acid through isolated cuticles. Our results provide a proof-of-concept demon-stration that the passive dosing method applied in this study can be used to measure the mass transfercoefﬁcients of organic chemicals through leaves. Key recommendations for future experiments are toload the PDMS at the highest feasible concentrations to avoid working at analyte levels close to the limitof detection, to keep the leaves moist and to minimize potential pathways for contamination of the PDMSsheets by exposure to laboratory air.
Place, publisher, year, edition, pages
2016. Vol. 164, 683-690 p.
Passive dosing, PDMS, Mass transfer coefficients, Leaves, LDPE
Research subject Applied Environmental Science
IdentifiersURN: urn:nbn:se:su:diva-136027DOI: 10.1016/j.chemosphere.2016.08.082ISI: 000385318200080OAI: oai:DiVA.org:su-136027DiVA: diva2:1050497
FunderSwedish Research Council, 2011-3890