Microplastic Monitoring

Particle concentration 400

Filter mesh size 0.30 mm

Current speed 0.4 m/s

Net tow speed 1.0 m/s

Captured / L

0.0

Detection accuracy

Sample volume

0.0 L

Total captured

How it works

A neuston/plankton-style net is towed vertically through the water column. Any particle whose diameter is at least the net's mesh aperture and that passes within the net mouth radius during a tow pass is retained; smaller particles slip straight through the mesh.

retained = (d_particle ≥ mesh_size) AND (|r_particle − r_net| ≤ R_net)
concentration_L = captured_count / sample_volume
sample_volume = π·R_net² · Σ(tow_speed · dt)

Particle concentration — how many microplastic fragments drift in the sampled water column.
Filter mesh size — the net's aperture in mm; finer mesh catches smaller fragments but the trade-off is real-world clogging (not modelled here).
Current speed — lateral drift speed carrying particles past the net, set by real ocean currents.
Net tow speed — how fast the net is hauled through the column; faster tows sample more volume per minute but can skip particles near the mesh threshold.

The spectroscopy scan simulates FTIR/Raman analysis of the captured sample: each retained particle is illuminated to confirm it is a real polymer signature, giving the detection accuracy readout.

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