Department of Chemistry, Delta State University, P.M.B. 1, Abraka, Nigeria.
Department of Chemistry, Delta State University, P.M.B. 1, Abraka, Nigeria.
Mar Pollut Bull. 2024 May;202:116040. doi: 10.1016/j.marpolbul.2024.116040. Epub 2024 Apr 2.
This study investigated the concentrations of 39 polybrominated diphenyl ether (PBDE) congeners in sediments from three rivers in the western Niger Delta of Nigeria that have been affected by pollution from urbanization and industrial activities. The Σ39 PBDE concentrations in sediments from these rivers ranged from 0.29 to 95.5, 5.15 to 121, and 0.73 to 66.1 ng g for the Afiesere (AR), Edor (ER), and Okpare Rivers (OR), respectively. The homologue distribution patterns indicated the prominence of tetra- and penta-BDE congeners in sediments from these rivers. The ecological risk assessment results showed that the penta-BDEs were the primary source of risk to sediment-dwelling organisms in these rivers. However, the human health risk assessment indicated negligible risks for exposure of both adults and children to PBDEs in these sediments. The source apportionment suggests that the PBDE contamination in these river sediments was derived from long-distance migration, debromination of highly brominated congeners, and commercial penta-BDEs. These results reflect the use of penta-BDE formulations in this region rather than octa- and deca-BDE formulations.
本研究调查了尼日利亚尼日尔三角洲西部三条受城市化和工业活动污染影响的河流中的沉积物中 39 种多溴二苯醚（PBDE）同系物的浓度。这些河流沉积物中的 Σ39 PBDE 浓度分别为 0.29 至 95.5、5.15 至 121 和 0.73 至 66.1 ng/g，来自 Afiesere（AR）、Edor（ER）和 Okpare 河流（OR）。同系物分布模式表明，这些河流沉积物中四溴和五溴同系物较为突出。生态风险评估结果表明，在这些河流中，五溴同系物是沉积物中栖息生物的主要风险来源。然而，人体健康风险评估表明，成人和儿童接触这些沉积物中 PBDE 的风险可以忽略不计。来源分配表明，这些河流沉积物中的 PBDE 污染来自远距离迁移、高溴同系物的脱溴以及商用五溴同系物。这些结果反映了该地区五溴代配方的使用，而不是八溴代和十溴代配方的使用。
