Bamidele Akinsanya, Kuton Minasu Pentho, Iniobong Akhiromen Dorathy, Uchenna Nwadike David, Saliu Joseph Kayode, David Ukwa Uche
Department of Zoology, University of Lagos, Lagos, Nigeria.
Department of Marine sciences and Fisheries, University of Lagos, Lagos, Nigeria.
Bull Environ Contam Toxicol. 2020 Nov;105(5):770-776. doi: 10.1007/s00128-020-02893-y. Epub 2020 Jun 5.
This paper investigates the concentrations of PCBs in the water and sediment media and its bio-concentration in the fish host-parasite bentho-pelagic food chain in Epe lagoon. Samples of water, sediment, plankton, mollusks, fish and intestinal helminth parasites were collected from three stations (Oriba, Imode and Ikosi) in Epe Lagoon. Concentration of total PCBs in the surface water and sediment across the stations ranges from 3.20 to 6.00 ppb and 405.50-860.70 ppb respectively. Imode had the highest concentrations. The plankton bio-concentrates most PCBs in Ikosi (286.70 ppb) followed by Imode concentration (165.40 ppb), then Oribo (92.60 ppb) with total bio-concentration of 544.60 ppb. Surface water temperature negatively and strongly correlates with PCBs in the plankton. The planktons bio-concentrates total PCBs 44 times than that in the surface water. Chrysichthys nigrodigitatus bio-concentrates total PCBs 48 times than that in the surface water. Bioaccumulation of PCBs in human food chain could pose health risk.
本文研究了埃佩泻湖水体和沉积物介质中多氯联苯的浓度及其在鱼类-寄生虫底栖-中上层食物链中的生物富集情况。从埃佩泻湖的三个站点（奥里巴、伊莫德和伊科西）采集了水、沉积物、浮游生物、软体动物、鱼类和肠道蠕虫寄生虫样本。各站点地表水和沉积物中多氯联苯的总浓度分别为3.20至6.00 ppb和405.50 - 860.70 ppb。伊莫德的浓度最高。浮游生物在伊科西对多氯联苯的生物富集量最高（286.70 ppb），其次是伊莫德的浓度（165.40 ppb），然后是奥里博（92.60 ppb），总生物富集量为544.60 ppb。地表水温度与浮游生物中的多氯联苯呈强烈负相关。浮游生物对多氯联苯的总生物富集量是地表水的44倍。黑鳍笛鲷对多氯联苯的总生物富集量是地表水的48倍。多氯联苯在人类食物链中的生物积累可能会带来健康风险。
