| 1 | Polybrominated diphenyl ethers(PBDEs)concentrations in soil,sediment and water samples around electronic wastes dumpsites in Lagos,Nigeria显示文摘Polybrominated diphenyl ethers(PBDEs)were listed in the Stockholm Convention as POPs because of their bio-accumulative,long-range and toxicity characteristics.Therefore,these should be managed and assessed by Parties of the convention in an environmentally sound manner.This present study assessed the status of PBDEs contamination at e-waste dumpsites in Lagos,Nigeria.Soil and sediment samples were collected from 3 e-waste dumpsites and water samples were collected from rain water ponds located within the e-waste dumpsites vicinities and control sites over a period of two years.The concentrations of ∑7PBDEs in soils from the e-waste dumpsites at 0e15 cm depth for the first and second year ranged from 141 to 302 ngg^(-1)dry weight,respectively while that of the control soils was 13.2 e27.2ngg^(-1)dry weight.These high concentrations may be attributed to the fact that open burning of electronic waste was the regular method of reducing the volume of e-waste at the sites.PBDE levels across the soil profile from 0 to 45 cm depth showed a gradual increase in PBDEs accumulation in the topsoil and migration into the sub-soil over the period of 2 years,but with no significant difference(pvalue=0.89).Sediments and water from the rain water ponds around the dumpsites were found to be contaminated by PBDEs with levels ranging from 51.4 to 85.8ngg^(-1)and 14.4 to 27.4ngg^(-1),respectively,while levels in control for sediment and water are 11.5ngg^(-1)and 2.43ngg^(-1)respectively.These,however indicates that there was significance difference between the PBDEs levels in water and sediment from the study sites with those of their respective controls(p-value for water was 0.01,while that for sediment was 0.03).The levels of PBDEs in this study sites were higher than those of the respective control.The range of PBDEs in e-waste dumpsites was comparable to those reported in USA and Europe but lower than those from China.Environmental samples from the e-waste dumpsites in Lagos were contaminated with PBDEs,there is therefore the need for proper disposal methods for end-of-life products especially those containing PBDEs in Nigeria. | Oloruntoba Kike Omotayo Sindiku Oladele Osibanjo Roland Weber | 2022 | Emerging Contaminants2022，8，1： | 2 |
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