Modelling passive sampling of hydrophilic compounds under time-variable aqueous concentrations.

ABSTRACT: Passive sampling is a crucial method for evaluating concentrations of hydrophilic organic compounds in the aquatic environment, but it is insufficiently understood to what extent passive samplers capture the intermittent emissions that frequently occur for this group of compounds. In the present study, silicone sheets and styrene-divinyl benzene-reversed phase sulfonated extraction disks with and without a polyethersulfone membrane were exposed under semi-field conditions in a 31 m³ flume at three different flow velocities. Natural processes and spiking/dilution measures caused aqueous concentrations to vary strongly with time. The data were analyzed using two analytical models that account for these time-variable concentrations: a sampling rate model and a diffusion model. The

SUBMITTER: Becker B 

PROVIDER: S-EPMC11374861 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature