Assertion: sediment's concentration | /r/CapableOf | increase over a 12 month study period
Facets:
Source sentences:
text: compared the long-term sorption of metals among plastic types in seawater and found that in general all types of plastics tended to accumulate similar concentrations of metals and that over a 12 month study period the concentrations of all metals increased over time and did not reach saturation.