Fig. 2From: Risk assessment of eight metals and their mixtures to aquatic biota in sediments with diffusive gradients in thin films (DGT): a case study in Pearl River intertidal zoneCorrelations between median grain size and organic matter (A) and CaCO3 (B). The scenarios of sampled sites S3 (C) and S16 (D); clay (< 4 μm), silt (4–63 μm), and sand (63–2000 μm)Back to article page