Bioaccumulation of Heavy Metals and Hydrocarbons in Hemichromis Fasciatus Exposed to Surface Water in Borrow Pits Located Within Onshore Oil Exploration and Production Area

摘要

A field bioaccumulation study was carried out. Juvenile hemichromis fasciatus in net cages were exposed to contaminated surface water in borrow pits located within oil exploration and production (E & P) installations within the Niger Delta region of Nigeria during wet and dry seasons. Percentage mortality ranged between 2% and 3.8%. Assuming a first order kinetics and steady state at day 14; toxicokinetic variables were obtained for xenobiotics assessed. The up-take rate constant k , ranged from 38.47 ×10 -2 d -1 (pit B, wet season) to 40.82 ×10 -2 d -1 (pit A, dry season) for TPH, while PAHs ranged between 22.40 ×10 -2 d -1 (pit B, wet season) and 24.98 ×10 -2 d -1 (pit A, dry season) for both pits and seasons. Amongst the water borne metals k for hemichromis fasciatus ranged from 4.66×10 -2 d -1 to 47.66 ×10 -2 d -1 and 2.70 ×10 -2 d -1 to 33.90×10 -2 d -1 in pits A and B respectively during both seasons. The order of uptake was Fe