A research consortium including scientists from Slovakia, Czech Republic has designed a convenient device for evaluating river water quality. Their mobile dynamic passive sampling device can be attached to a cruising ship. It is capable of reproducible and sensitive detection of trace organic compounds, as demonstrated for the river Danube. Along a total distance of >2000km, between Passau (GER) and Tulcea (RO), chemical analysis and bioanalytic/toxicity assessment revealed major differences in pollutant type and concentration in eight pre-defined river stretches. Among over 150 chemicals found, prominent ones include diverse pharmaceuticals as well as triisobutylphosphate, a strong solvent used for liquefying concrete, textile auxiliaries and paper coating compounds; and naphtalen, attributable to solvent-/synthetics-producing industries.
The device could prove useful to monitor water quality improvements that potentially arise from ecoinnovative alternatives replacing non-eco production processes.

Vrana B, Smedes F, Allan I, Rusina T, Okonski K, Hilscherova K, Novak J, Tarabek P, Slobodnik J. 2018. Mobile dynamic passive sampling of trace organic compounds: Evaluation of sampler performance in the Danube River. Sci Total Environ 636: 1597-1607.
Novak J, Vrana B, Rusina T, Okonski K, Grabic R, Neale PA, Escher BI, Macova M, Ait-Aissa S, Creusot N, et al. 2018. Effect-based monitoring of the Danube River using mobile passive sampling. Sci Total Environ 636: 1608-1619.