Research Paper
Relationship between Occurrences of Perfluoroalkyl Acids in Medaka, Environmental Water, and Sediment in Its Habitat and Bioconcentration
2018 Volume 41 Issue 4 Pages 61-71
Details
2018 Volume 41 Issue 4 Pages 61-71
Perfluoroalkyl acid (PFAA) is diffused into the environment and detected in wildlife and its environmental persistence and accumulation is becoming a major concern. In this study, we determined the homolog distribution of 15 PFAA in samples of medaka (Olyzias latipes) , surrounding water, and sediment collected from 5 sites in Japan. PFAA concentrations in environmental water, sediment, and medaka differed depending on the sampling site; however, each PFAA composition ratio was almost constant within these sampling sites. The PFAA bioconcentration factor (BCF) in medaka was related with the octanol/water partition coefficient (Log Kow) of PFAA. PFAA concentrations in the water samples had better correlations with those in the sediment samples not per unit dry weight, but per unit ignition loss (IL) . In addition, between sediment and medaka, good correlations were found when the comparison was done with the PFAA concentrations of sediment per unit IL. The PFAA accumulation in medaka was estimated by multiregression analysis using the PFAA concentrations in sediment per unit IL, gender, and body length. The PFAA concentrations in sediment per unit IL were significantly related to accumulation in medaka.
