Desorption modeling of hydrophobic organic chemicals from plastic sheets using experimentally determined diffusion coefficients in plastics

Hwang Lee, Da Eun Byun, Ju Min Kim, Jung-Hwan Kwon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

To evaluate rate of migration from plastic debris, desorption of model hydrophobic organic chemicals (HOCs) from polyethylene (PE)/polypropylene (PP) films to water was measured using PE/PP films homogeneously loaded with the HOCs. The HOCs fractions remaining in the PE/PP films were compared with those predicted using a model characterized by the mass transfer Biot number. The experimental data agreed with the model simulation, indicating that HOCs desorption from plastic particles can generally be described by the model. For hexachlorocyclohexanes with lower plastic-water partition coefficients, desorption was dominated by diffusion in the plastic film, whereas desorption of chlorinated benzenes with higher partition coefficients was determined by diffusion in the aqueous boundary layer. Evaluation of the fraction of HOCs remaining in plastic films with respect to film thickness and desorption time showed that the partition coefficient between plastic and water is the most important parameter influencing the desorption half-life.

Original languageEnglish
Pages (from-to)312-317
Number of pages6
JournalMarine Pollution Bulletin
Volume126
DOIs
Publication statusPublished - 2018 Jan 1

Keywords

  • Bioavailability
  • Biot number
  • Diffusion coefficient
  • Partition coefficient
  • Polyethylene
  • Polypropylene

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Pollution

Fingerprint Dive into the research topics of 'Desorption modeling of hydrophobic organic chemicals from plastic sheets using experimentally determined diffusion coefficients in plastics'. Together they form a unique fingerprint.

Cite this