The suitability of @entity691 sheets as passive samplers of lipophilic contaminants in water bodies was tested. High-density @entity691 (HDPE) and low-density @entity691 (LDPE) sheets were contaminated with @entity2556 . Uncontaminated and pre-contaminated sheets were deployed simultaneously and collected at intervals over 32 days. The exposed sheets and water samples were analyzed for @entity2556 . The initial @entity2556 concentrations in the contaminated and uncontaminated sheets differed by two to three orders of magnitude, but approached a common equilibrium concentration during exposure. The two- to four-ring @entity2556 achieved quasi-equilibrium within the 32-day exposure period, whereas the five- and six-ring @entity2556 did not. The estimated PE/water partition coefficients were approximately three times higher for HDPE than for LDPE, and they were similar in magnitude to the K(ow) values (the partition coefficients between @entity32215 and water). The uptake rate constants were approximately four times higher for HDPE than LDPE, which was attributed to the four times higher specific surface area. The uptake and elimination in HDPE followed linear first-order kinetics, whereas for LDPE very slow elimination rates were observed that could not be explained. The results show that PE is a simple, effective, and inexpensive material for sampling trace organic contaminants in water.

Partitioning of polycyclic aromatic hydrocarbons in the XXXX /water system.

@entity691 :: ('MESH:D020959', 'Chemical') :: ['polyethylene'] @entity2556 :: ('CHEBI:33848', 'Chemical') :: ['PAH'] @entity32215 :: ('MESH:D020003', 'Chemical') :: ['n-octanol']
@entity691 :: (MESH:D020959,Chemical) :: ['polyethylene']
