Fig. 6
From: Analysis, occurrence and removal of polychlorinated biphenyls (PCBs) in mine water – A review
Microplastics in filter residue of mining influenced water from the abandoned Straßberg/Germany fluorspar mine. Light, round dots are fluorescent microspheres (20 µm diameter), elongated objects are microplastics, granular objects unidentified, very likely Fe oxyhydrates. Width: ≈ 400 µm (source: authors; fluorescent microscopy image)