Influence of physicochemical and chemical parameters on polybrominated diphenyl ethers in selected landfill leachates, sediments and river sediments from Gauteng, South Africa.

摘要: Polybrominated diphenyl ethers (PBDEs) are known to be persistent, endocrine disruptors and bioaccumulative can cause adverse health effects in animals humans. In this study, river landfill sediment samples were collected from selected rivers municipal solid waste (MSWL) sites across Gauteng Province South Africa determine the levels of common PBDEs (BDE-17, BDE-47, BDE-99, BDE-100, BDE-153, BDE-154, BDE-183 BDE-209). The mean median concentrations Σ8 was 2.4 0.4 ng g(-1), respectively, a range 0.8-114 g(-1). highest concentration (43.6 g(-1)) observed at Jukskei River with more than two orders magnitude greater rest. total PBDE leachate ranged 0.8 8.4 g(-1) 127-3,702 pg L(-1) for matrices. BDE-209 predominantly detected most samples. Two MSWLs which lined geomembranes gave ∑7 (2,678 3,702 L(-1)). Correlation values versus Co (r = 0.65), Cu (r = 0.52), Mn (r = 0.10), Mg (r = 0.76), Ca (r = 0.66) Ni (r = 0.77) statistical significance (p   0.05). positive correlation may suggest possible influence trace metals on leachates. Furthermore, test relationship between major anions yielded Cl(-) (r = 0.94, p = 0.16), F(-) (r = 0.97, p = 0.21), Br(-) (r = 0.6, p = 0.29) NO3 (2-) (r = 0.96, p = 0.08) an insignificant difference. However, evaluation some water quality parameters (pH, dissolved oxygen electrical conductivity) negative concentrations.