Fig. 4From: Dilution or enrichment: the effects of flood on pollutants in urban riversRisk values of 18 organic pollutants in sediment samples before (BF), during (DF) and after flood (AF) (a); The RQMEC/PNEC of OCP mixture, OPP mixture and RQ of E2 in sediment samples before (BF), during (DF) and after flood (AF) (b)Back to article page