Fig. 3From: Spatial distribution and contamination assessment of heavy metal pollution of sediments in coastal reclamation areas: a case study in Shenzhen Bay, Chinaa Box and whisker plot of the Igeo indices of the six heavy metals analysed in the sediments of Shenzhen Bay (n = 15, a). The box represents the 25th to 75th percentiles, □ represents the average values, and the top and bottom horizontal lines represent the maximum and minimum values, respectively. b Igeo values in sediments of different sites from the inner to the outer of Shenzhen BayBack to article page