Environmental Pollution In The Nigeria Coastal Waters; A Case Study Of The Lagos Lagoon
The state of pollution in the Lagos lagoon was examined by a field survey of twenty-six sites (stations) in the dry and wet season in 1985. Some selected sites were further re-examined in the same period in 1986. The sediment trace metals and total hydrocarbons were analysed. The relationship between non residual and residual trace elements was examined. For both years of study, total trace metal levels (mg/kg) fell in the ranges: Cu,1.9 – 132.4, Cr, 2.9 – 167; 7.8 – 830. 6; Ph, 1.6 – 483.1 and Cd, 0.04 – 15.5. Total hydrocarbon concentrations in 1985 ranged from 0.25 to 2766.27 mg/g with high concentrations in muddy and sandy sediments. The results show marked variations and non – uniform distribution from one season to another. With few exceptions, higher values of trace metals and total hydrocarbons were obtained at sites located in the Western industrialized portions and lower values at sites far moved from sources of anthrogenic inputs. The results pointed to a need for an environmental pollution monitoring programme to ensure good water quality and detect subtle changes which could provide early warning (signals) of potential gross damage.
| Main Authors: | , , |
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| Format: | Working Paper biblioteca |
| Language: | English |
| Published: |
1991
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| Subjects: | Environmental pollution, Coastal waters, |
| Online Access: | http://hdl.handle.net/1834/269 |
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